https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103534
--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jason Merrill <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:2e8067041d1d69da02bd7578f58abc11eb35a04b commit r12-5906-g2e8067041d1d69da02bd7578f58abc11eb35a04b Author: Jason Merrill <ja...@redhat.com> Date: Fri Dec 10 11:21:50 2021 -0500 libstdc++: check length in string append [PR103534] In the testcase for 103534 we get a warning about append leading to memcpy of a very large number of bytes overflowing the buffer. This turns out to be because we weren't calling _M_check_length for string append. Rather than do that directly, let's go through the public pointer append that calls it. PR c++/103534 libstdc++-v3/ChangeLog: * include/bits/basic_string.h (append (basic_string)): Call pointer append instead of _M_append directly. gcc/testsuite/ChangeLog: * g++.dg/warn/Wstringop-overflow-8.C: New test.
