cc1plus: note: source object is likely at address zero
Jonny Grant <[email protected]> Thu, 5 Mar 2026 13:08:43 +0000
| Newsgroups | gmane.comp.gcc.help |
|---|---|
| Message-ID | <[email protected]> |
Hello
Is there a way to make these "notes" appear as warnings? That can then be upgraded to errors by -Werror
https://godbolt.org/z/4ae71rfj8
#include <string>
#include <cstdio>
typedef struct a
{
int a;
int b;
char buf[10];
} a_t;
int main()
{
a_t * i;
i = nullptr;
printf("%s\n", i->buf);
}
<source>: In function 'int main()':
<source>:18:11: warning: 'int __builtin_puts(const char*)' reading 1 or more bytes from a region of size 0 [-Wstringop-overread]
18 | printf("%s\n", i->buf);
| ~~~~~~^~~~~~~~~~~~~~~~
cc1plus: note: source object is likely at address zero
ASM generation compiler returned: 0
<source>: In function 'int main()':
<source>:18:11: warning: 'int __builtin_puts(const char*)' reading 1 or more bytes from a region of size 0 [-Wstringop-overread]
18 | printf("%s\n", i->buf);
| ~~~~~~^~~~~~~~~~~~~~~~
cc1plus: note: source object is likely at address zero
Execution build compiler returned: 0
Program returned: 139