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* [Bug c++/107069] New: string assignment triggers warning
@ 2022-09-28 13:27 joerg.richter@pdv-fs.de
2022-09-28 20:19 ` [Bug c++/107069] " redi at gcc dot gnu.org
2022-09-29 15:19 ` msebor at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: joerg.richter@pdv-fs.de @ 2022-09-28 13:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107069
Bug ID: 107069
Summary: string assignment triggers warning
Product: gcc
Version: 12.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: joerg.richter@pdv-fs.de
Target Milestone: ---
cat > t.cc <<EOF
#include <string>
std::string f()
{
std::string r;
r = "C";
return r;
}
EOF
/tools/pkg/gcc/12.2.0/bin/g++ -Wall -Wextra -Werror -std=gnu++20 -O2 -c -o
t.cc.o t.cc
gives:
...gcc/12.2.0/include/c++/12.2.0/bits/char_traits.h:431:56: error: 'void*
__builtin_memcpy(void*, const void*, long unsigned int)' accessing
9223372036854775810 or more bytes at offsets [2, 9223372036854775807] and 17
may overlap up to 9223372036854775813 bytes at offset -3 [-Werror=restrict]
431 | return static_cast<char_type*>(__builtin_memcpy(__s1, __s2,
__n));
|
~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
^ permalink raw reply [flat|nested] 3+ messages in thread
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2022-09-28 13:27 [Bug c++/107069] New: string assignment triggers warning joerg.richter@pdv-fs.de
2022-09-28 20:19 ` [Bug c++/107069] " redi at gcc dot gnu.org
2022-09-29 15:19 ` msebor at gcc dot gnu.org
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