modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/compile/950921-1.c (about)

     1  f ()
     2  {
     3    union
     4      {
     5        signed char c;
     6        double d;
     7      } u;
     8  
     9    u.c = 1;
    10    u.c = 1;
    11    return u.c;
    12  }