https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78236
--- Comment #1 from Christophe Monat <christophe.monat at st dot com> --- Comment on attachment 39982 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39982 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() > { } > > /**
