https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80329
Bug ID: 80329
Summary: Poor location for array bounds warning
Product: gcc
Version: 7.0.1
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: redi at gcc dot gnu.org
Target Milestone: ---
#include <string>
int main()
{
std::string s("", 2);
}
With -O2 -Wsystem-headers there's a valid warning, but with a useless location:
In file included from
/home/jwakely/gcc/7/include/c++/7.0.1/bits/stl_algobase.h:66:0,
from
/home/jwakely/gcc/7/include/c++/7.0.1/bits/char_traits.h:39,
from /home/jwakely/gcc/7/include/c++/7.0.1/string:40,
from s.cc:1:
/home/jwakely/gcc/7/include/c++/7.0.1/bits/stl_iterator_base_funcs.h: In
function ‘int main()’:
/home/jwakely/gcc/7/include/c++/7.0.1/bits/stl_iterator_base_funcs.h:104:21:
warning: array subscript is above array bounds [-Warray-bounds]
return __last - __first;
~~~~~~~^~~~~~~~~
gcc-6-branch doesn't warn, but I hesitate to call this a regression because the
warning is pointing out a real problem (we try to copy 2 bytes from the array
"").
