[Bug c++/63497] std::regex can't handle [^class] correctly and cause runtime crash

[timshen at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63497

--- Comment #5 from Tim Shen <timshen at gcc dot gnu.org> ---
Author: timshen
Date: Thu Oct 23 03:15:52 2014
New Revision: 216572

URL: https://gcc.gnu.org/viewcvs?rev=216572&root=gcc&view=rev
Log:
    PR libstdc++/63497
    include/bits/regex_executor.h (_Executor::_M_word_boundary): Remove
    unused parameter.
    include/bits/regex_executor.tcc (_Executor::_M_dfs,
    _Executor::_M_word_boundary): Avoid dereferecing _M_current at _M_end
    or other invalid position.

Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/include/bits/regex_executor.h
    trunk/libstdc++-v3/include/bits/regex_executor.tcc