[Bug libstdc++/78236] regex_iterator constructor is incomplete and creates uninitialized values that may be used

[timshen at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78236

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 Christophe Monat from comment #1)
> Comment on attachment 39982 [details]
> Proposed patch to fix the regex_iterator constructor
> 
> >diff --git a/libstdc++-v3/include/bits/regex.h b/libstdc++-v3/include/bits/regex.h
> >index a7d45e6..bb0a167 100644
> >--- a/libstdc++-v3/include/bits/regex.h
> >+++ b/libstdc++-v3/include/bits/regex.h
> >@@ -2454,7 +2454,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CXX11
> >        * one-past-the-end of a range.
> >        */
> >       regex_iterator()
> >-      : _M_match()
> >+      : _M_pregex(), _M_flags(regex_constants::match_default), _M_match()
> >       { }
> > 
> >       /**

I proposed another way to fix this in the list:
https://gcc.gnu.org/ml/libstdc++/2016-11/msg00008.html