github.com/jhump/golang-x-tools@v0.0.0-20220218190644-4958d6d39439/go/analysis/passes/printf/testdata/src/a/a.go (about)

     1  // Copyright 2010 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // This file contains tests for the printf checker.
     6  
     7  package a
     8  
     9  import (
    10  	"fmt"
    11  	logpkg "log" // renamed to make it harder to see
    12  	"math"
    13  	"os"
    14  	"testing"
    15  	"unsafe" // just for test case printing unsafe.Pointer
    16  
    17  	// For testing printf-like functions from external package.
    18  	// "github.com/foobar/externalprintf"
    19  	"b"
    20  )
    21  
    22  func UnsafePointerPrintfTest() {
    23  	var up unsafe.Pointer
    24  	fmt.Printf("%p, %x %X", up, up, up)
    25  }
    26  
    27  // Error methods that do not satisfy the Error interface and should be checked.
    28  type errorTest1 int
    29  
    30  func (errorTest1) Error(...interface{}) string {
    31  	return "hi"
    32  }
    33  
    34  type errorTest2 int // Analogous to testing's *T type.
    35  func (errorTest2) Error(...interface{}) {
    36  }
    37  
    38  type errorTest3 int
    39  
    40  func (errorTest3) Error() { // No return value.
    41  }
    42  
    43  type errorTest4 int
    44  
    45  func (errorTest4) Error() int { // Different return type.
    46  	return 3
    47  }
    48  
    49  type errorTest5 int
    50  
    51  func (errorTest5) error() { // niladic; don't complain if no args (was bug)
    52  }
    53  
    54  type errorTestOK int
    55  
    56  func (errorTestOK) Error() string { return "" }
    57  
    58  // This function never executes, but it serves as a simple test for the program.
    59  // Test with make test.
    60  func PrintfTests() {
    61  	var b bool
    62  	var i int
    63  	var r rune
    64  	var s string
    65  	var x float64
    66  	var p *int
    67  	var imap map[int]int
    68  	var fslice []float64
    69  	var c complex64
    70  	var err error
    71  	// Some good format/argtypes
    72  	fmt.Printf("")
    73  	fmt.Printf("%b %b %b", 3, i, x)
    74  	fmt.Printf("%c %c %c %c", 3, i, 'x', r)
    75  	fmt.Printf("%d %d %d", 3, i, imap)
    76  	fmt.Printf("%e %e %e %e", 3e9, x, fslice, c)
    77  	fmt.Printf("%E %E %E %E", 3e9, x, fslice, c)
    78  	fmt.Printf("%f %f %f %f", 3e9, x, fslice, c)
    79  	fmt.Printf("%F %F %F %F", 3e9, x, fslice, c)
    80  	fmt.Printf("%g %g %g %g", 3e9, x, fslice, c)
    81  	fmt.Printf("%G %G %G %G", 3e9, x, fslice, c)
    82  	fmt.Printf("%b %b %b %b", 3e9, x, fslice, c)
    83  	fmt.Printf("%o %o", 3, i)
    84  	fmt.Printf("%O %O", 3, i)
    85  	fmt.Printf("%p", p)
    86  	fmt.Printf("%q %q %q %q", 3, i, 'x', r)
    87  	fmt.Printf("%s %s %s", "hi", s, []byte{65})
    88  	fmt.Printf("%t %t", true, b)
    89  	fmt.Printf("%T %T", 3, i)
    90  	fmt.Printf("%U %U", 3, i)
    91  	fmt.Printf("%v %v", 3, i)
    92  	fmt.Printf("%x %x %x %x %x %x %x", 3, i, "hi", s, x, c, fslice)
    93  	fmt.Printf("%X %X %X %X %X %X %X", 3, i, "hi", s, x, c, fslice)
    94  	fmt.Printf("%.*s %d %g", 3, "hi", 23, 2.3)
    95  	fmt.Printf("%s", &stringerv)
    96  	fmt.Printf("%v", &stringerv)
    97  	fmt.Printf("%T", &stringerv)
    98  	fmt.Printf("%s", &embeddedStringerv)
    99  	fmt.Printf("%v", &embeddedStringerv)
   100  	fmt.Printf("%T", &embeddedStringerv)
   101  	fmt.Printf("%v", notstringerv)
   102  	fmt.Printf("%T", notstringerv)
   103  	fmt.Printf("%q", stringerarrayv)
   104  	fmt.Printf("%v", stringerarrayv)
   105  	fmt.Printf("%s", stringerarrayv)
   106  	fmt.Printf("%v", notstringerarrayv)
   107  	fmt.Printf("%T", notstringerarrayv)
   108  	fmt.Printf("%d", new(fmt.Formatter))
   109  	fmt.Printf("%*%", 2)                              // Ridiculous but allowed.
   110  	fmt.Printf("%s", interface{}(nil))                // Nothing useful we can say.
   111  	fmt.Printf("%a", interface{}(new(BoolFormatter))) // Could be a fmt.Formatter.
   112  
   113  	fmt.Printf("%g", 1+2i)
   114  	fmt.Printf("%#e %#E %#f %#F %#g %#G", 1.2, 1.2, 1.2, 1.2, 1.2, 1.2) // OK since Go 1.9
   115  	// Some bad format/argTypes
   116  	fmt.Printf("%b", "hi")                      // want "fmt.Printf format %b has arg \x22hi\x22 of wrong type string"
   117  	fmt.Printf("%t", c)                         // want "fmt.Printf format %t has arg c of wrong type complex64"
   118  	fmt.Printf("%t", 1+2i)                      // want `fmt.Printf format %t has arg 1 \+ 2i of wrong type complex128`
   119  	fmt.Printf("%c", 2.3)                       // want "fmt.Printf format %c has arg 2.3 of wrong type float64"
   120  	fmt.Printf("%d", 2.3)                       // want "fmt.Printf format %d has arg 2.3 of wrong type float64"
   121  	fmt.Printf("%e", "hi")                      // want `fmt.Printf format %e has arg "hi" of wrong type string`
   122  	fmt.Printf("%E", true)                      // want "fmt.Printf format %E has arg true of wrong type bool"
   123  	fmt.Printf("%f", "hi")                      // want "fmt.Printf format %f has arg \x22hi\x22 of wrong type string"
   124  	fmt.Printf("%F", 'x')                       // want "fmt.Printf format %F has arg 'x' of wrong type rune"
   125  	fmt.Printf("%g", "hi")                      // want `fmt.Printf format %g has arg "hi" of wrong type string`
   126  	fmt.Printf("%g", imap)                      // want `fmt.Printf format %g has arg imap of wrong type map\[int\]int`
   127  	fmt.Printf("%G", i)                         // want "fmt.Printf format %G has arg i of wrong type int"
   128  	fmt.Printf("%o", x)                         // want "fmt.Printf format %o has arg x of wrong type float64"
   129  	fmt.Printf("%O", x)                         // want "fmt.Printf format %O has arg x of wrong type float64"
   130  	fmt.Printf("%p", nil)                       // want "fmt.Printf format %p has arg nil of wrong type untyped nil"
   131  	fmt.Printf("%p", 23)                        // want "fmt.Printf format %p has arg 23 of wrong type int"
   132  	fmt.Printf("%q", x)                         // want "fmt.Printf format %q has arg x of wrong type float64"
   133  	fmt.Printf("%s", b)                         // want "fmt.Printf format %s has arg b of wrong type bool"
   134  	fmt.Printf("%s", byte(65))                  // want `fmt.Printf format %s has arg byte\(65\) of wrong type byte`
   135  	fmt.Printf("%t", 23)                        // want "fmt.Printf format %t has arg 23 of wrong type int"
   136  	fmt.Printf("%U", x)                         // want "fmt.Printf format %U has arg x of wrong type float64"
   137  	fmt.Printf("%x", nil)                       // want "fmt.Printf format %x has arg nil of wrong type untyped nil"
   138  	fmt.Printf("%s", stringerv)                 // want "fmt.Printf format %s has arg stringerv of wrong type a.ptrStringer"
   139  	fmt.Printf("%t", stringerv)                 // want "fmt.Printf format %t has arg stringerv of wrong type a.ptrStringer"
   140  	fmt.Printf("%s", embeddedStringerv)         // want "fmt.Printf format %s has arg embeddedStringerv of wrong type a.embeddedStringer"
   141  	fmt.Printf("%t", embeddedStringerv)         // want "fmt.Printf format %t has arg embeddedStringerv of wrong type a.embeddedStringer"
   142  	fmt.Printf("%q", notstringerv)              // want "fmt.Printf format %q has arg notstringerv of wrong type a.notstringer"
   143  	fmt.Printf("%t", notstringerv)              // want "fmt.Printf format %t has arg notstringerv of wrong type a.notstringer"
   144  	fmt.Printf("%t", stringerarrayv)            // want "fmt.Printf format %t has arg stringerarrayv of wrong type a.stringerarray"
   145  	fmt.Printf("%t", notstringerarrayv)         // want "fmt.Printf format %t has arg notstringerarrayv of wrong type a.notstringerarray"
   146  	fmt.Printf("%q", notstringerarrayv)         // want "fmt.Printf format %q has arg notstringerarrayv of wrong type a.notstringerarray"
   147  	fmt.Printf("%d", BoolFormatter(true))       // want `fmt.Printf format %d has arg BoolFormatter\(true\) of wrong type a.BoolFormatter`
   148  	fmt.Printf("%z", FormatterVal(true))        // correct (the type is responsible for formatting)
   149  	fmt.Printf("%d", FormatterVal(true))        // correct (the type is responsible for formatting)
   150  	fmt.Printf("%s", nonemptyinterface)         // correct (the type is responsible for formatting)
   151  	fmt.Printf("%.*s %d %6g", 3, "hi", 23, 'x') // want "fmt.Printf format %6g has arg 'x' of wrong type rune"
   152  	fmt.Println()                               // not an error
   153  	fmt.Println("%s", "hi")                     // want "fmt.Println call has possible formatting directive %s"
   154  	fmt.Println("%v", "hi")                     // want "fmt.Println call has possible formatting directive %v"
   155  	fmt.Println("%T", "hi")                     // want "fmt.Println call has possible formatting directive %T"
   156  	fmt.Println("%s"+" there", "hi")            // want "fmt.Println call has possible formatting directive %s"
   157  	fmt.Println("0.0%")                         // correct (trailing % couldn't be a formatting directive)
   158  	fmt.Printf("%s", "hi", 3)                   // want "fmt.Printf call needs 1 arg but has 2 args"
   159  	_ = fmt.Sprintf("%"+("s"), "hi", 3)         // want "fmt.Sprintf call needs 1 arg but has 2 args"
   160  	fmt.Printf("%s%%%d", "hi", 3)               // correct
   161  	fmt.Printf("%08s", "woo")                   // correct
   162  	fmt.Printf("% 8s", "woo")                   // correct
   163  	fmt.Printf("%.*d", 3, 3)                    // correct
   164  	fmt.Printf("%.*d x", 3, 3, 3, 3)            // want "fmt.Printf call needs 2 args but has 4 args"
   165  	fmt.Printf("%.*d x", "hi", 3)               // want `fmt.Printf format %.*d uses non-int "hi" as argument of \*`
   166  	fmt.Printf("%.*d x", i, 3)                  // correct
   167  	fmt.Printf("%.*d x", s, 3)                  // want `fmt.Printf format %.\*d uses non-int s as argument of \*`
   168  	fmt.Printf("%*% x", 0.22)                   // want `fmt.Printf format %\*% uses non-int 0.22 as argument of \*`
   169  	fmt.Printf("%q %q", multi()...)             // ok
   170  	fmt.Printf("%#q", `blah`)                   // ok
   171  	fmt.Printf("%#b", 3)                        // ok
   172  	// printf("now is the time", "buddy")          // no error "a.printf call has arguments but no formatting directives"
   173  	Printf("now is the time", "buddy") // want "a.Printf call has arguments but no formatting directives"
   174  	Printf("hi")                       // ok
   175  	const format = "%s %s\n"
   176  	Printf(format, "hi", "there")
   177  	Printf(format, "hi")              // want "a.Printf format %s reads arg #2, but call has 1 arg$"
   178  	Printf("%s %d %.3v %q", "str", 4) // want "a.Printf format %.3v reads arg #3, but call has 2 args"
   179  	f := new(ptrStringer)
   180  	f.Warn(0, "%s", "hello", 3)           // want `\(\*a.ptrStringer\).Warn call has possible formatting directive %s`
   181  	f.Warnf(0, "%s", "hello", 3)          // want `\(\*a.ptrStringer\).Warnf call needs 1 arg but has 2 args`
   182  	f.Warnf(0, "%r", "hello")             // want `\(\*a.ptrStringer\).Warnf format %r has unknown verb r`
   183  	f.Warnf(0, "%#s", "hello")            // want `\(\*a.ptrStringer\).Warnf format %#s has unrecognized flag #`
   184  	f.Warn2(0, "%s", "hello", 3)          // want `\(\*a.ptrStringer\).Warn2 call has possible formatting directive %s`
   185  	f.Warnf2(0, "%s", "hello", 3)         // want `\(\*a.ptrStringer\).Warnf2 call needs 1 arg but has 2 args`
   186  	f.Warnf2(0, "%r", "hello")            // want `\(\*a.ptrStringer\).Warnf2 format %r has unknown verb r`
   187  	f.Warnf2(0, "%#s", "hello")           // want `\(\*a.ptrStringer\).Warnf2 format %#s has unrecognized flag #`
   188  	f.Wrap(0, "%s", "hello", 3)           // want `\(\*a.ptrStringer\).Wrap call has possible formatting directive %s`
   189  	f.Wrapf(0, "%s", "hello", 3)          // want `\(\*a.ptrStringer\).Wrapf call needs 1 arg but has 2 args`
   190  	f.Wrapf(0, "%r", "hello")             // want `\(\*a.ptrStringer\).Wrapf format %r has unknown verb r`
   191  	f.Wrapf(0, "%#s", "hello")            // want `\(\*a.ptrStringer\).Wrapf format %#s has unrecognized flag #`
   192  	f.Wrap2(0, "%s", "hello", 3)          // want `\(\*a.ptrStringer\).Wrap2 call has possible formatting directive %s`
   193  	f.Wrapf2(0, "%s", "hello", 3)         // want `\(\*a.ptrStringer\).Wrapf2 call needs 1 arg but has 2 args`
   194  	f.Wrapf2(0, "%r", "hello")            // want `\(\*a.ptrStringer\).Wrapf2 format %r has unknown verb r`
   195  	f.Wrapf2(0, "%#s", "hello")           // want `\(\*a.ptrStringer\).Wrapf2 format %#s has unrecognized flag #`
   196  	fmt.Printf("%#s", FormatterVal(true)) // correct (the type is responsible for formatting)
   197  	Printf("d%", 2)                       // want "a.Printf format % is missing verb at end of string"
   198  	Printf("%d", percentDV)
   199  	Printf("%d", &percentDV)
   200  	Printf("%d", notPercentDV)  // want "a.Printf format %d has arg notPercentDV of wrong type a.notPercentDStruct"
   201  	Printf("%d", &notPercentDV) // want `a.Printf format %d has arg &notPercentDV of wrong type \*a.notPercentDStruct`
   202  	Printf("%p", &notPercentDV) // Works regardless: we print it as a pointer.
   203  	Printf("%q", &percentDV)    // want `a.Printf format %q has arg &percentDV of wrong type \*a.percentDStruct`
   204  	Printf("%s", percentSV)
   205  	Printf("%s", &percentSV)
   206  	// Good argument reorderings.
   207  	Printf("%[1]d", 3)
   208  	Printf("%[1]*d", 3, 1)
   209  	Printf("%[2]*[1]d", 1, 3)
   210  	Printf("%[2]*.[1]*[3]d", 2, 3, 4)
   211  	fmt.Fprintf(os.Stderr, "%[2]*.[1]*[3]d", 2, 3, 4) // Use Fprintf to make sure we count arguments correctly.
   212  	// Bad argument reorderings.
   213  	Printf("%[xd", 3)                      // want `a.Printf format %\[xd is missing closing \]`
   214  	Printf("%[x]d x", 3)                   // want `a.Printf format has invalid argument index \[x\]`
   215  	Printf("%[3]*s x", "hi", 2)            // want `a.Printf format has invalid argument index \[3\]`
   216  	_ = fmt.Sprintf("%[3]d x", 2)          // want `fmt.Sprintf format has invalid argument index \[3\]`
   217  	Printf("%[2]*.[1]*[3]d x", 2, "hi", 4) // want `a.Printf format %\[2]\*\.\[1\]\*\[3\]d uses non-int \x22hi\x22 as argument of \*`
   218  	Printf("%[0]s x", "arg1")              // want `a.Printf format has invalid argument index \[0\]`
   219  	Printf("%[0]d x", 1)                   // want `a.Printf format has invalid argument index \[0\]`
   220  	// Something that satisfies the error interface.
   221  	var e error
   222  	fmt.Println(e.Error()) // ok
   223  	// Something that looks like an error interface but isn't, such as the (*T).Error method
   224  	// in the testing package.
   225  	var et1 *testing.T
   226  	et1.Error()         // ok
   227  	et1.Error("hi")     // ok
   228  	et1.Error("%d", 3)  // want `\(\*testing.common\).Error call has possible formatting directive %d`
   229  	et1.Errorf("%s", 1) // want `\(\*testing.common\).Errorf format %s has arg 1 of wrong type int`
   230  	var et3 errorTest3
   231  	et3.Error() // ok, not an error method.
   232  	var et4 errorTest4
   233  	et4.Error() // ok, not an error method.
   234  	var et5 errorTest5
   235  	et5.error() // ok, not an error method.
   236  	// Interfaces can be used with any verb.
   237  	var iface interface {
   238  		ToTheMadness() bool // Method ToTheMadness usually returns false
   239  	}
   240  	fmt.Printf("%f", iface) // ok: fmt treats interfaces as transparent and iface may well have a float concrete type
   241  	// Can't print a function.
   242  	Printf("%d", someFunction) // want "a.Printf format %d arg someFunction is a func value, not called"
   243  	Printf("%v", someFunction) // want "a.Printf format %v arg someFunction is a func value, not called"
   244  	Println(someFunction)      // want "a.Println arg someFunction is a func value, not called"
   245  	Printf("%p", someFunction) // ok: maybe someone wants to see the pointer
   246  	Printf("%T", someFunction) // ok: maybe someone wants to see the type
   247  	// Bug: used to recur forever.
   248  	Printf("%p %x", recursiveStructV, recursiveStructV.next)
   249  	Printf("%p %x", recursiveStruct1V, recursiveStruct1V.next) // want `a.Printf format %x has arg recursiveStruct1V\.next of wrong type \*a\.RecursiveStruct2`
   250  	Printf("%p %x", recursiveSliceV, recursiveSliceV)
   251  	Printf("%p %x", recursiveMapV, recursiveMapV)
   252  	// Special handling for Log.
   253  	math.Log(3) // OK
   254  	var t *testing.T
   255  	t.Log("%d", 3) // want `\(\*testing.common\).Log call has possible formatting directive %d`
   256  	t.Logf("%d", 3)
   257  	t.Logf("%d", "hi") // want `\(\*testing.common\).Logf format %d has arg "hi" of wrong type string`
   258  
   259  	Errorf(1, "%d", 3)    // OK
   260  	Errorf(1, "%d", "hi") // want `a.Errorf format %d has arg "hi" of wrong type string`
   261  
   262  	// Multiple string arguments before variadic args
   263  	errorf("WARNING", "foobar")            // OK
   264  	errorf("INFO", "s=%s, n=%d", "foo", 1) // OK
   265  	errorf("ERROR", "%d")                  // want "a.errorf format %d reads arg #1, but call has 0 args"
   266  
   267  	var tb testing.TB
   268  	tb.Errorf("%s", 1) // want `\(testing.TB\).Errorf format %s has arg 1 of wrong type int`
   269  
   270  	// Printf from external package
   271  	// externalprintf.Printf("%d", 42) // OK
   272  	// externalprintf.Printf("foobar") // OK
   273  	// level := 123
   274  	// externalprintf.Logf(level, "%d", 42)                        // OK
   275  	// externalprintf.Errorf(level, level, "foo %q bar", "foobar") // OK
   276  	// externalprintf.Logf(level, "%d")                            // no error "Logf format %d reads arg #1, but call has 0 args"
   277  	// var formatStr = "%s %s"
   278  	// externalprintf.Sprintf(formatStr, "a", "b")     // OK
   279  	// externalprintf.Logf(level, formatStr, "a", "b") // OK
   280  
   281  	// user-defined Println-like functions
   282  	ss := &someStruct{}
   283  	ss.Log(someFunction, "foo")          // OK
   284  	ss.Error(someFunction, someFunction) // OK
   285  	ss.Println()                         // OK
   286  	ss.Println(1.234, "foo")             // OK
   287  	ss.Println(1, someFunction)          // no error "Println arg someFunction is a func value, not called"
   288  	ss.log(someFunction)                 // OK
   289  	ss.log(someFunction, "bar", 1.33)    // OK
   290  	ss.log(someFunction, someFunction)   // no error "log arg someFunction is a func value, not called"
   291  
   292  	// indexed arguments
   293  	Printf("%d %[3]d %d %[2]d x", 1, 2, 3, 4)             // OK
   294  	Printf("%d %[0]d %d %[2]d x", 1, 2, 3, 4)             // want `a.Printf format has invalid argument index \[0\]`
   295  	Printf("%d %[3]d %d %[-2]d x", 1, 2, 3, 4)            // want `a.Printf format has invalid argument index \[-2\]`
   296  	Printf("%d %[3]d %d %[2234234234234]d x", 1, 2, 3, 4) // want `a.Printf format has invalid argument index \[2234234234234\]`
   297  	Printf("%d %[3]d %-10d %[2]d x", 1, 2, 3)             // want "a.Printf format %-10d reads arg #4, but call has 3 args"
   298  	Printf("%[1][3]d x", 1, 2)                            // want `a.Printf format %\[1\]\[ has unknown verb \[`
   299  	Printf("%[1]d x", 1, 2)                               // OK
   300  	Printf("%d %[3]d %d %[2]d x", 1, 2, 3, 4, 5)          // OK
   301  
   302  	// wrote Println but meant Fprintln
   303  	Printf("%p\n", os.Stdout)   // OK
   304  	Println(os.Stdout, "hello") // want "a.Println does not take io.Writer but has first arg os.Stdout"
   305  
   306  	Printf(someString(), "hello") // OK
   307  
   308  	// Printf wrappers in package log should be detected automatically
   309  	logpkg.Fatal("%d", 1)    // want "log.Fatal call has possible formatting directive %d"
   310  	logpkg.Fatalf("%d", "x") // want `log.Fatalf format %d has arg "x" of wrong type string`
   311  	logpkg.Fatalln("%d", 1)  // want "log.Fatalln call has possible formatting directive %d"
   312  	logpkg.Panic("%d", 1)    // want "log.Panic call has possible formatting directive %d"
   313  	logpkg.Panicf("%d", "x") // want `log.Panicf format %d has arg "x" of wrong type string`
   314  	logpkg.Panicln("%d", 1)  // want "log.Panicln call has possible formatting directive %d"
   315  	logpkg.Print("%d", 1)    // want "log.Print call has possible formatting directive %d"
   316  	logpkg.Printf("%d", "x") // want `log.Printf format %d has arg "x" of wrong type string`
   317  	logpkg.Println("%d", 1)  // want "log.Println call has possible formatting directive %d"
   318  
   319  	// Methods too.
   320  	var l *logpkg.Logger
   321  	l.Fatal("%d", 1)    // want `\(\*log.Logger\).Fatal call has possible formatting directive %d`
   322  	l.Fatalf("%d", "x") // want `\(\*log.Logger\).Fatalf format %d has arg "x" of wrong type string`
   323  	l.Fatalln("%d", 1)  // want `\(\*log.Logger\).Fatalln call has possible formatting directive %d`
   324  	l.Panic("%d", 1)    // want `\(\*log.Logger\).Panic call has possible formatting directive %d`
   325  	l.Panicf("%d", "x") // want `\(\*log.Logger\).Panicf format %d has arg "x" of wrong type string`
   326  	l.Panicln("%d", 1)  // want `\(\*log.Logger\).Panicln call has possible formatting directive %d`
   327  	l.Print("%d", 1)    // want `\(\*log.Logger\).Print call has possible formatting directive %d`
   328  	l.Printf("%d", "x") // want `\(\*log.Logger\).Printf format %d has arg "x" of wrong type string`
   329  	l.Println("%d", 1)  // want `\(\*log.Logger\).Println call has possible formatting directive %d`
   330  
   331  	// Issue 26486
   332  	dbg("", 1) // no error "call has arguments but no formatting directive"
   333  
   334  	// %w
   335  	var errSubset interface {
   336  		Error() string
   337  		A()
   338  	}
   339  	_ = fmt.Errorf("%w", err)               // OK
   340  	_ = fmt.Errorf("%#w", err)              // OK
   341  	_ = fmt.Errorf("%[2]w %[1]s", "x", err) // OK
   342  	_ = fmt.Errorf("%[2]w %[1]s", e, "x")   // want `fmt.Errorf format %\[2\]w has arg "x" of wrong type string`
   343  	_ = fmt.Errorf("%w", "x")               // want `fmt.Errorf format %w has arg "x" of wrong type string`
   344  	_ = fmt.Errorf("%w %w", err, err)       // want `fmt.Errorf call has more than one error-wrapping directive %w`
   345  	_ = fmt.Errorf("%w", interface{}(nil))  // want `fmt.Errorf format %w has arg interface{}\(nil\) of wrong type interface{}`
   346  	_ = fmt.Errorf("%w", errorTestOK(0))    // concrete value implements error
   347  	_ = fmt.Errorf("%w", errSubset)         // interface value implements error
   348  	fmt.Printf("%w", err)                   // want `fmt.Printf does not support error-wrapping directive %w`
   349  	var wt *testing.T
   350  	wt.Errorf("%w", err)          // want `\(\*testing.common\).Errorf does not support error-wrapping directive %w`
   351  	wt.Errorf("%[1][3]d x", 1, 2) // want `\(\*testing.common\).Errorf format %\[1\]\[ has unknown verb \[`
   352  	wt.Errorf("%[1]d x", 1, 2)    // OK
   353  	// Errorf is a printfWrapper, not an errorfWrapper.
   354  	Errorf(0, "%w", err) // want `a.Errorf does not support error-wrapping directive %w`
   355  	// %w should work on fmt.Errorf-based wrappers.
   356  	var es errorfStruct
   357  	var eis errorfIntStruct
   358  	var ess errorfStringStruct
   359  	es.Errorf("%w", err)           // OK
   360  	eis.Errorf(0, "%w", err)       // OK
   361  	ess.Errorf("ERROR", "%w", err) // OK
   362  }
   363  
   364  func someString() string { return "X" }
   365  
   366  type someStruct struct{}
   367  
   368  // Log is non-variadic user-define Println-like function.
   369  // Calls to this func must be skipped when checking
   370  // for Println-like arguments.
   371  func (ss *someStruct) Log(f func(), s string) {}
   372  
   373  // Error is variadic user-define Println-like function.
   374  // Calls to this func mustn't be checked for Println-like arguments,
   375  // since variadic arguments type isn't interface{}.
   376  func (ss *someStruct) Error(args ...func()) {}
   377  
   378  // Println is variadic user-defined Println-like function.
   379  // Calls to this func must be checked for Println-like arguments.
   380  func (ss *someStruct) Println(args ...interface{}) {}
   381  
   382  // log is variadic user-defined Println-like function.
   383  // Calls to this func must be checked for Println-like arguments.
   384  func (ss *someStruct) log(f func(), args ...interface{}) {}
   385  
   386  // A function we use as a function value; it has no other purpose.
   387  func someFunction() {}
   388  
   389  // Printf is used by the test so we must declare it.
   390  func Printf(format string, args ...interface{}) { // want Printf:"printfWrapper"
   391  	fmt.Printf(format, args...)
   392  }
   393  
   394  // Println is used by the test so we must declare it.
   395  func Println(args ...interface{}) { // want Println:"printWrapper"
   396  	fmt.Println(args...)
   397  }
   398  
   399  // printf is used by the test so we must declare it.
   400  func printf(format string, args ...interface{}) { // want printf:"printfWrapper"
   401  	fmt.Printf(format, args...)
   402  }
   403  
   404  // Errorf is used by the test for a case in which the first parameter
   405  // is not a format string.
   406  func Errorf(i int, format string, args ...interface{}) { // want Errorf:"printfWrapper"
   407  	fmt.Sprintf(format, args...)
   408  }
   409  
   410  // errorf is used by the test for a case in which the function accepts multiple
   411  // string parameters before variadic arguments
   412  func errorf(level, format string, args ...interface{}) { // want errorf:"printfWrapper"
   413  	fmt.Sprintf(format, args...)
   414  }
   415  
   416  type errorfStruct struct{}
   417  
   418  // Errorf is used to test %w works on errorf wrappers.
   419  func (errorfStruct) Errorf(format string, args ...interface{}) { // want Errorf:"errorfWrapper"
   420  	_ = fmt.Errorf(format, args...)
   421  }
   422  
   423  type errorfStringStruct struct{}
   424  
   425  // Errorf is used by the test for a case in which the function accepts multiple
   426  // string parameters before variadic arguments
   427  func (errorfStringStruct) Errorf(level, format string, args ...interface{}) { // want Errorf:"errorfWrapper"
   428  	_ = fmt.Errorf(format, args...)
   429  }
   430  
   431  type errorfIntStruct struct{}
   432  
   433  // Errorf is used by the test for a case in which the first parameter
   434  // is not a format string.
   435  func (errorfIntStruct) Errorf(i int, format string, args ...interface{}) { // want Errorf:"errorfWrapper"
   436  	_ = fmt.Errorf(format, args...)
   437  }
   438  
   439  // multi is used by the test.
   440  func multi() []interface{} {
   441  	panic("don't call - testing only")
   442  }
   443  
   444  type stringer int
   445  
   446  func (stringer) String() string { return "string" }
   447  
   448  type ptrStringer float64
   449  
   450  var stringerv ptrStringer
   451  
   452  func (*ptrStringer) String() string {
   453  	return "string"
   454  }
   455  
   456  func (p *ptrStringer) Warn2(x int, args ...interface{}) string { // want Warn2:"printWrapper"
   457  	return p.Warn(x, args...)
   458  }
   459  
   460  func (p *ptrStringer) Warnf2(x int, format string, args ...interface{}) string { // want Warnf2:"printfWrapper"
   461  	return p.Warnf(x, format, args...)
   462  }
   463  
   464  // During testing -printf.funcs flag matches Warn.
   465  func (*ptrStringer) Warn(x int, args ...interface{}) string {
   466  	return "warn"
   467  }
   468  
   469  // During testing -printf.funcs flag matches Warnf.
   470  func (*ptrStringer) Warnf(x int, format string, args ...interface{}) string {
   471  	return "warnf"
   472  }
   473  
   474  func (p *ptrStringer) Wrap2(x int, args ...interface{}) string { // want Wrap2:"printWrapper"
   475  	return p.Wrap(x, args...)
   476  }
   477  
   478  func (p *ptrStringer) Wrapf2(x int, format string, args ...interface{}) string { // want Wrapf2:"printfWrapper"
   479  	return p.Wrapf(x, format, args...)
   480  }
   481  
   482  func (*ptrStringer) Wrap(x int, args ...interface{}) string { // want Wrap:"printWrapper"
   483  	return fmt.Sprint(args...)
   484  }
   485  
   486  func (*ptrStringer) Wrapf(x int, format string, args ...interface{}) string { // want Wrapf:"printfWrapper"
   487  	return fmt.Sprintf(format, args...)
   488  }
   489  
   490  func (*ptrStringer) BadWrap(x int, args ...interface{}) string {
   491  	return fmt.Sprint(args) // want "missing ... in args forwarded to print-like function"
   492  }
   493  
   494  func (*ptrStringer) BadWrapf(x int, format string, args ...interface{}) string {
   495  	return fmt.Sprintf(format, args) // want "missing ... in args forwarded to printf-like function"
   496  }
   497  
   498  func (*ptrStringer) WrapfFalsePositive(x int, arg1 string, arg2 ...interface{}) string {
   499  	return fmt.Sprintf("%s %v", arg1, arg2)
   500  }
   501  
   502  type embeddedStringer struct {
   503  	foo string
   504  	ptrStringer
   505  	bar int
   506  }
   507  
   508  var embeddedStringerv embeddedStringer
   509  
   510  type notstringer struct {
   511  	f float64
   512  }
   513  
   514  var notstringerv notstringer
   515  
   516  type stringerarray [4]float64
   517  
   518  func (stringerarray) String() string {
   519  	return "string"
   520  }
   521  
   522  var stringerarrayv stringerarray
   523  
   524  type notstringerarray [4]float64
   525  
   526  var notstringerarrayv notstringerarray
   527  
   528  var nonemptyinterface = interface {
   529  	f()
   530  }(nil)
   531  
   532  // A data type we can print with "%d".
   533  type percentDStruct struct {
   534  	a int
   535  	b []byte
   536  	c *float64
   537  }
   538  
   539  var percentDV percentDStruct
   540  
   541  // A data type we cannot print correctly with "%d".
   542  type notPercentDStruct struct {
   543  	a int
   544  	b []byte
   545  	c bool
   546  }
   547  
   548  var notPercentDV notPercentDStruct
   549  
   550  // A data type we can print with "%s".
   551  type percentSStruct struct {
   552  	a string
   553  	b []byte
   554  	C stringerarray
   555  }
   556  
   557  var percentSV percentSStruct
   558  
   559  type recursiveStringer int
   560  
   561  func (s recursiveStringer) String() string {
   562  	_ = fmt.Sprintf("%d", s)
   563  	_ = fmt.Sprintf("%#v", s)
   564  	_ = fmt.Sprintf("%v", s)  // want `fmt.Sprintf format %v with arg s causes recursive \(a.recursiveStringer\).String method call`
   565  	_ = fmt.Sprintf("%v", &s) // want `fmt.Sprintf format %v with arg &s causes recursive \(a.recursiveStringer\).String method call`
   566  	_ = fmt.Sprintf("%T", s)  // ok; does not recursively call String
   567  	return fmt.Sprintln(s)    // want `fmt.Sprintln arg s causes recursive call to \(a.recursiveStringer\).String method`
   568  }
   569  
   570  type recursivePtrStringer int
   571  
   572  func (p *recursivePtrStringer) String() string {
   573  	_ = fmt.Sprintf("%v", *p)
   574  	_ = fmt.Sprint(&p)     // ok; prints address
   575  	return fmt.Sprintln(p) // want `fmt.Sprintln arg p causes recursive call to \(\*a.recursivePtrStringer\).String method`
   576  }
   577  
   578  type recursiveError int
   579  
   580  func (s recursiveError) Error() string {
   581  	_ = fmt.Sprintf("%d", s)
   582  	_ = fmt.Sprintf("%#v", s)
   583  	_ = fmt.Sprintf("%v", s)  // want `fmt.Sprintf format %v with arg s causes recursive \(a.recursiveError\).Error method call`
   584  	_ = fmt.Sprintf("%v", &s) // want `fmt.Sprintf format %v with arg &s causes recursive \(a.recursiveError\).Error method call`
   585  	_ = fmt.Sprintf("%T", s)  // ok; does not recursively call Error
   586  	return fmt.Sprintln(s)    // want `fmt.Sprintln arg s causes recursive call to \(a.recursiveError\).Error method`
   587  }
   588  
   589  type recursivePtrError int
   590  
   591  func (p *recursivePtrError) Error() string {
   592  	_ = fmt.Sprintf("%v", *p)
   593  	_ = fmt.Sprint(&p)     // ok; prints address
   594  	return fmt.Sprintln(p) // want `fmt.Sprintln arg p causes recursive call to \(\*a.recursivePtrError\).Error method`
   595  }
   596  
   597  type recursiveStringerAndError int
   598  
   599  func (s recursiveStringerAndError) String() string {
   600  	_ = fmt.Sprintf("%d", s)
   601  	_ = fmt.Sprintf("%#v", s)
   602  	_ = fmt.Sprintf("%v", s)  // want `fmt.Sprintf format %v with arg s causes recursive \(a.recursiveStringerAndError\).String method call`
   603  	_ = fmt.Sprintf("%v", &s) // want `fmt.Sprintf format %v with arg &s causes recursive \(a.recursiveStringerAndError\).String method call`
   604  	_ = fmt.Sprintf("%T", s)  // ok; does not recursively call String
   605  	return fmt.Sprintln(s)    // want `fmt.Sprintln arg s causes recursive call to \(a.recursiveStringerAndError\).String method`
   606  }
   607  
   608  func (s recursiveStringerAndError) Error() string {
   609  	_ = fmt.Sprintf("%d", s)
   610  	_ = fmt.Sprintf("%#v", s)
   611  	_ = fmt.Sprintf("%v", s)  // want `fmt.Sprintf format %v with arg s causes recursive \(a.recursiveStringerAndError\).Error method call`
   612  	_ = fmt.Sprintf("%v", &s) // want `fmt.Sprintf format %v with arg &s causes recursive \(a.recursiveStringerAndError\).Error method call`
   613  	_ = fmt.Sprintf("%T", s)  // ok; does not recursively call Error
   614  	return fmt.Sprintln(s)    // want `fmt.Sprintln arg s causes recursive call to \(a.recursiveStringerAndError\).Error method`
   615  }
   616  
   617  type recursivePtrStringerAndError int
   618  
   619  func (p *recursivePtrStringerAndError) String() string {
   620  	_ = fmt.Sprintf("%v", *p)
   621  	_ = fmt.Sprint(&p)     // ok; prints address
   622  	return fmt.Sprintln(p) // want `fmt.Sprintln arg p causes recursive call to \(\*a.recursivePtrStringerAndError\).String method`
   623  }
   624  
   625  func (p *recursivePtrStringerAndError) Error() string {
   626  	_ = fmt.Sprintf("%v", *p)
   627  	_ = fmt.Sprint(&p)     // ok; prints address
   628  	return fmt.Sprintln(p) // want `fmt.Sprintln arg p causes recursive call to \(\*a.recursivePtrStringerAndError\).Error method`
   629  }
   630  
   631  // implements a String() method but with non-matching return types
   632  type nonStringerWrongReturn int
   633  
   634  func (s nonStringerWrongReturn) String() (string, error) {
   635  	return "", fmt.Errorf("%v", s)
   636  }
   637  
   638  // implements a String() method but with non-matching arguments
   639  type nonStringerWrongArgs int
   640  
   641  func (s nonStringerWrongArgs) String(i int) string {
   642  	return fmt.Sprintf("%d%v", i, s)
   643  }
   644  
   645  type cons struct {
   646  	car int
   647  	cdr *cons
   648  }
   649  
   650  func (cons *cons) String() string {
   651  	if cons == nil {
   652  		return "nil"
   653  	}
   654  	_ = fmt.Sprint(cons.cdr)                            // don't want "recursive call" diagnostic
   655  	return fmt.Sprintf("(%d . %v)", cons.car, cons.cdr) // don't want "recursive call" diagnostic
   656  }
   657  
   658  type BoolFormatter bool
   659  
   660  func (*BoolFormatter) Format(fmt.State, rune) {
   661  }
   662  
   663  // Formatter with value receiver
   664  type FormatterVal bool
   665  
   666  func (FormatterVal) Format(fmt.State, rune) {
   667  }
   668  
   669  type RecursiveSlice []RecursiveSlice
   670  
   671  var recursiveSliceV = &RecursiveSlice{}
   672  
   673  type RecursiveMap map[int]RecursiveMap
   674  
   675  var recursiveMapV = make(RecursiveMap)
   676  
   677  type RecursiveStruct struct {
   678  	next *RecursiveStruct
   679  }
   680  
   681  var recursiveStructV = &RecursiveStruct{}
   682  
   683  type RecursiveStruct1 struct {
   684  	next *RecursiveStruct2
   685  }
   686  
   687  type RecursiveStruct2 struct {
   688  	next *RecursiveStruct1
   689  }
   690  
   691  var recursiveStruct1V = &RecursiveStruct1{}
   692  
   693  type unexportedInterface struct {
   694  	f interface{}
   695  }
   696  
   697  // Issue 17798: unexported ptrStringer cannot be formatted.
   698  type unexportedStringer struct {
   699  	t ptrStringer
   700  }
   701  
   702  type unexportedStringerOtherFields struct {
   703  	s string
   704  	t ptrStringer
   705  	S string
   706  }
   707  
   708  // Issue 17798: unexported error cannot be formatted.
   709  type unexportedError struct {
   710  	e error
   711  }
   712  
   713  type unexportedErrorOtherFields struct {
   714  	s string
   715  	e error
   716  	S string
   717  }
   718  
   719  type errorer struct{}
   720  
   721  func (e errorer) Error() string { return "errorer" }
   722  
   723  type unexportedCustomError struct {
   724  	e errorer
   725  }
   726  
   727  type errorInterface interface {
   728  	error
   729  	ExtraMethod()
   730  }
   731  
   732  type unexportedErrorInterface struct {
   733  	e errorInterface
   734  }
   735  
   736  func UnexportedStringerOrError() {
   737  	fmt.Printf("%s", unexportedInterface{"foo"}) // ok; prints {foo}
   738  	fmt.Printf("%s", unexportedInterface{3})     // ok; we can't see the problem
   739  
   740  	us := unexportedStringer{}
   741  	fmt.Printf("%s", us)  // want "Printf format %s has arg us of wrong type a.unexportedStringer"
   742  	fmt.Printf("%s", &us) // want "Printf format %s has arg &us of wrong type [*]a.unexportedStringer"
   743  
   744  	usf := unexportedStringerOtherFields{
   745  		s: "foo",
   746  		S: "bar",
   747  	}
   748  	fmt.Printf("%s", usf)  // want "Printf format %s has arg usf of wrong type a.unexportedStringerOtherFields"
   749  	fmt.Printf("%s", &usf) // want "Printf format %s has arg &usf of wrong type [*]a.unexportedStringerOtherFields"
   750  
   751  	ue := unexportedError{
   752  		e: &errorer{},
   753  	}
   754  	fmt.Printf("%s", ue)  // want "Printf format %s has arg ue of wrong type a.unexportedError"
   755  	fmt.Printf("%s", &ue) // want "Printf format %s has arg &ue of wrong type [*]a.unexportedError"
   756  
   757  	uef := unexportedErrorOtherFields{
   758  		s: "foo",
   759  		e: &errorer{},
   760  		S: "bar",
   761  	}
   762  	fmt.Printf("%s", uef)  // want "Printf format %s has arg uef of wrong type a.unexportedErrorOtherFields"
   763  	fmt.Printf("%s", &uef) // want "Printf format %s has arg &uef of wrong type [*]a.unexportedErrorOtherFields"
   764  
   765  	uce := unexportedCustomError{
   766  		e: errorer{},
   767  	}
   768  	fmt.Printf("%s", uce) // want "Printf format %s has arg uce of wrong type a.unexportedCustomError"
   769  
   770  	uei := unexportedErrorInterface{}
   771  	fmt.Printf("%s", uei)       // want "Printf format %s has arg uei of wrong type a.unexportedErrorInterface"
   772  	fmt.Println("foo\n", "bar") // not an error
   773  
   774  	fmt.Println("foo\n")      // want "Println arg list ends with redundant newline"
   775  	fmt.Println("foo" + "\n") // want "Println arg list ends with redundant newline"
   776  	fmt.Println("foo\\n")     // not an error
   777  	fmt.Println(`foo\n`)      // not an error
   778  
   779  	intSlice := []int{3, 4}
   780  	fmt.Printf("%s", intSlice) // want `fmt.Printf format %s has arg intSlice of wrong type \[\]int`
   781  	nonStringerArray := [1]unexportedStringer{{}}
   782  	fmt.Printf("%s", nonStringerArray)  // want `fmt.Printf format %s has arg nonStringerArray of wrong type \[1\]a.unexportedStringer`
   783  	fmt.Printf("%s", []stringer{3, 4})  // not an error
   784  	fmt.Printf("%s", [2]stringer{3, 4}) // not an error
   785  }
   786  
   787  // TODO: Disable complaint about '0' for Go 1.10. To be fixed properly in 1.11.
   788  // See issues 23598 and 23605.
   789  func DisableErrorForFlag0() {
   790  	fmt.Printf("%0t", true)
   791  }
   792  
   793  // Issue 26486.
   794  func dbg(format string, args ...interface{}) {
   795  	if format == "" {
   796  		format = "%v"
   797  	}
   798  	fmt.Printf(format, args...)
   799  }
   800  
   801  func PointersToCompoundTypes() {
   802  	stringSlice := []string{"a", "b"}
   803  	fmt.Printf("%s", &stringSlice) // not an error
   804  
   805  	intSlice := []int{3, 4}
   806  	fmt.Printf("%s", &intSlice) // want `fmt.Printf format %s has arg &intSlice of wrong type \*\[\]int`
   807  
   808  	stringArray := [2]string{"a", "b"}
   809  	fmt.Printf("%s", &stringArray) // not an error
   810  
   811  	intArray := [2]int{3, 4}
   812  	fmt.Printf("%s", &intArray) // want `fmt.Printf format %s has arg &intArray of wrong type \*\[2\]int`
   813  
   814  	stringStruct := struct{ F string }{"foo"}
   815  	fmt.Printf("%s", &stringStruct) // not an error
   816  
   817  	intStruct := struct{ F int }{3}
   818  	fmt.Printf("%s", &intStruct) // want `fmt.Printf format %s has arg &intStruct of wrong type \*struct{F int}`
   819  
   820  	stringMap := map[string]string{"foo": "bar"}
   821  	fmt.Printf("%s", &stringMap) // not an error
   822  
   823  	intMap := map[int]int{3: 4}
   824  	fmt.Printf("%s", &intMap) // want `fmt.Printf format %s has arg &intMap of wrong type \*map\[int\]int`
   825  
   826  	type T2 struct {
   827  		X string
   828  	}
   829  	type T1 struct {
   830  		X *T2
   831  	}
   832  	fmt.Printf("%s\n", T1{&T2{"x"}}) // want `fmt.Printf format %s has arg T1{&T2{.x.}} of wrong type a\.T1`
   833  }
   834  
   835  // Printf wrappers from external package
   836  func externalPackage() {
   837  	b.Wrapf("%s", 1) // want "Wrapf format %s has arg 1 of wrong type int"
   838  	b.Wrap("%s", 1)  // want "Wrap call has possible formatting directive %s"
   839  	b.NoWrap("%s", 1)
   840  	b.Wrapf2("%s", 1) // want "Wrapf2 format %s has arg 1 of wrong type int"
   841  }
   842  
   843  func PointerVerbs() {
   844  	// Use booleans, so that we don't just format the elements like in
   845  	// PointersToCompoundTypes. Bools can only be formatted with verbs like
   846  	// %t and %v, and none of the ones below.
   847  	ptr := new(bool)
   848  	slice := []bool{}
   849  	array := [3]bool{}
   850  	map_ := map[bool]bool{}
   851  	chan_ := make(chan bool)
   852  	func_ := func(bool) {}
   853  
   854  	// %p, %b, %d, %o, %O, %x, and %X all support pointers.
   855  	fmt.Printf("%p", ptr)
   856  	fmt.Printf("%b", ptr)
   857  	fmt.Printf("%d", ptr)
   858  	fmt.Printf("%o", ptr)
   859  	fmt.Printf("%O", ptr)
   860  	fmt.Printf("%x", ptr)
   861  	fmt.Printf("%X", ptr)
   862  
   863  	// %p, %b, %d, %o, %O, %x, and %X all support channels.
   864  	fmt.Printf("%p", chan_)
   865  	fmt.Printf("%b", chan_)
   866  	fmt.Printf("%d", chan_)
   867  	fmt.Printf("%o", chan_)
   868  	fmt.Printf("%O", chan_)
   869  	fmt.Printf("%x", chan_)
   870  	fmt.Printf("%X", chan_)
   871  
   872  	// %p is the only one that supports funcs.
   873  	fmt.Printf("%p", func_)
   874  	fmt.Printf("%b", func_) // want `fmt.Printf format %b arg func_ is a func value, not called`
   875  	fmt.Printf("%d", func_) // want `fmt.Printf format %d arg func_ is a func value, not called`
   876  	fmt.Printf("%o", func_) // want `fmt.Printf format %o arg func_ is a func value, not called`
   877  	fmt.Printf("%O", func_) // want `fmt.Printf format %O arg func_ is a func value, not called`
   878  	fmt.Printf("%x", func_) // want `fmt.Printf format %x arg func_ is a func value, not called`
   879  	fmt.Printf("%X", func_) // want `fmt.Printf format %X arg func_ is a func value, not called`
   880  
   881  	// %p is the only one that supports all slices, by printing the address
   882  	// of the 0th element.
   883  	fmt.Printf("%p", slice) // supported; address of 0th element
   884  	fmt.Printf("%b", slice) // want `fmt.Printf format %b has arg slice of wrong type \[\]bool`
   885  
   886  	fmt.Printf("%d", slice) // want `fmt.Printf format %d has arg slice of wrong type \[\]bool`
   887  
   888  	fmt.Printf("%o", slice) // want `fmt.Printf format %o has arg slice of wrong type \[\]bool`
   889  	fmt.Printf("%O", slice) // want `fmt.Printf format %O has arg slice of wrong type \[\]bool`
   890  
   891  	fmt.Printf("%x", slice) // want `fmt.Printf format %x has arg slice of wrong type \[\]bool`
   892  	fmt.Printf("%X", slice) // want `fmt.Printf format %X has arg slice of wrong type \[\]bool`
   893  
   894  	// None support arrays.
   895  	fmt.Printf("%p", array) // want `fmt.Printf format %p has arg array of wrong type \[3\]bool`
   896  	fmt.Printf("%b", array) // want `fmt.Printf format %b has arg array of wrong type \[3\]bool`
   897  	fmt.Printf("%d", array) // want `fmt.Printf format %d has arg array of wrong type \[3\]bool`
   898  	fmt.Printf("%o", array) // want `fmt.Printf format %o has arg array of wrong type \[3\]bool`
   899  	fmt.Printf("%O", array) // want `fmt.Printf format %O has arg array of wrong type \[3\]bool`
   900  	fmt.Printf("%x", array) // want `fmt.Printf format %x has arg array of wrong type \[3\]bool`
   901  	fmt.Printf("%X", array) // want `fmt.Printf format %X has arg array of wrong type \[3\]bool`
   902  
   903  	// %p is the only one that supports all maps.
   904  	fmt.Printf("%p", map_) // supported; address of 0th element
   905  	fmt.Printf("%b", map_) // want `fmt.Printf format %b has arg map_ of wrong type map\[bool\]bool`
   906  
   907  	fmt.Printf("%d", map_) // want `fmt.Printf format %d has arg map_ of wrong type map\[bool\]bool`
   908  
   909  	fmt.Printf("%o", map_) // want `fmt.Printf format %o has arg map_ of wrong type map\[bool\]bool`
   910  	fmt.Printf("%O", map_) // want `fmt.Printf format %O has arg map_ of wrong type map\[bool\]bool`
   911  
   912  	fmt.Printf("%x", map_) // want `fmt.Printf format %x has arg map_ of wrong type map\[bool\]bool`
   913  	fmt.Printf("%X", map_) // want `fmt.Printf format %X has arg map_ of wrong type map\[bool\]bool`
   914  }