1 /* { dg-do compile } */
2 /* { dg-options "-Wsign-compare -std=c99" } */
3
4 #include <stdbool.h>
5
foo()6 int foo()
7 {
8 unsigned char b = '1';
9
10 bool x = ~b; /* { dg-warning "promoted ~unsigned is always non-zero" } */
11
12 return 0;
13 }
14