https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80847
Bug ID: 80847
Summary: UBSAN: yet another false positive (part2)
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: babokin at gmail dot com
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at
gcc dot gnu.org
Target Milestone: ---
gcc rev248312, x86_64.
> cat f.cpp
long long int a = -8619712598616233901LL;
long long int b = -2492839055825936744LL;
long long int c = 0;
int main() {
if (c * a + b * c)
return 1;
return 0;
}
> g++ -fsanitize=undefined -O0 f.cpp
> ./a.out
f.cpp:5:13: runtime error: signed integer overflow: -8619712598616233901 +
-2492839055825936744 cannot be represented in type 'long long int'
