modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/pr33631.c (about)

     1  typedef union
     2  {
     3    int __lock;
     4  } pthread_mutex_t;
     5  
     6  extern void abort (void);
     7  
     8  int main()
     9  {
    10      struct { int c; pthread_mutex_t m; } r = { .m = 0 };
    11      if (r.c != 0)
    12        abort ();
    13      return 0;
    14  }