Fix a bug in regex_token_iterator's copy constructor. Caught by Bob Wilson. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@199122 91177308-0d34-0410-b5e6-96231b3b80d8 
diff --git a/include/regex b/include/regex index f8569f9..b7416f8 100644 --- a/include/regex +++ b/include/regex 
@@ -6288,7 +6288,7 @@  __subs_(__x.__subs_)  {  if (__x.__result_ == &__x.__suffix_) - __result_ == &__suffix_; + __result_ = &__suffix_;  else if ( __result_ != nullptr )  __establish_result ();  }