https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111269
Bug ID: 111269
Summary: Confusing location of error in source code
Product: gcc
Version: 13.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: alx at kernel dot org
Target Milestone: ---
I've been confused for some time with a compilation error that
pointed to a slightly-off location. I wasn't seeing that I used
a temporary variable in a constant expression. The code could be
reduced to:
$ cat const.c
int
main(void)
{
int x = 42;
_Static_assert(0 || 7 > x, "");
}
$ gcc-13 -Wall -Wextra const.c
const.c: In function ‘main’:
const.c:6:26: error: expression in static assertion is not constant
6 | _Static_assert(0 || 7 > x, "");
| ~~^~~~~~~~
$ clang-16 -Weverything const.c
const.c:6:26: error: static assertion expression is not an integral constant
expression
_Static_assert(0 || 7 > x, "");
~~~~~~~~~^
1 error generated.
Clang points to the precise location of the problem, while GCC is too fuzzy.
I suspect this is a duplicate of other bugs, but I'm not sure, so I'll let you
decide that.
