https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71500
Tim Shen <timshen at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |timshen at gcc dot gnu.org
--- Comment #2 from Tim Shen <timshen at gcc dot gnu.org> ---
(In reply to Michael Duggan from comment #1)
> I can confirm this issue exists in debian's libstdc++-6-dev (6.1.1-5)
> package.
>
> I've done some tracing, and here is what I have been able to determine:
>
> (All of the below refers to functions in bits/regex_compiler.tcc.)
>
Thanks for the investigation!
I post a patch here: https://gcc.gnu.org/ml/libstdc++/2016-06/msg00012.html
> When std::__detail::_BracketMatcher<std::__cxx11::regex_traits<char>, true,
> false>::_M_apply is called, _M_char_set contains just {'a'}, and
> _M_range_set contains {{first='A', second='F'}}.
This is not expected. _M_char_set should be empty, since in the bracket
expression there is only a range A-F. This is due to a bug where __last_char is
not defined correctly.
After fixing that, the output should be:
aaa : Nope
AAA : Match
fff : Nope
FFF : Match
, which is incorrect in an expected way :).
Then it's easy to fix - simply change _RegexTranslator::_M_transform to
consider icase first by calling _M_translate.
