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-rw-r--r--libcxx/include/regex18
1 files changed, 18 insertions, 0 deletions
diff --git a/libcxx/include/regex b/libcxx/include/regex
index f8fb6af8266..975f64010dd 100644
--- a/libcxx/include/regex
+++ b/libcxx/include/regex
@@ -5555,6 +5555,12 @@ basic_regex<_CharT, _Traits>::__match_at_start_ecma(
switch (__s.__do_)
{
case __state::__end_state:
+ if (__flags & regex_constants::match_not_null &&
+ __s.__current_ == __first)
+ {
+ __states.pop_back();
+ break;
+ }
__m.__matches_[0].first = __first;
__m.__matches_[0].second = _VSTD::next(__first, __s.__current_ - __first);
__m.__matches_[0].matched = true;
@@ -5618,6 +5624,12 @@ basic_regex<_CharT, _Traits>::__match_at_start_posix_nosubs(
switch (__s.__do_)
{
case __state::__end_state:
+ if (__flags & regex_constants::match_not_null &&
+ __s.__current_ == __first)
+ {
+ __states.pop_back();
+ break;
+ }
if (!__matched || __highest_j < __s.__current_ - __s.__first_)
__highest_j = __s.__current_ - __s.__first_;
__matched = true;
@@ -5703,6 +5715,12 @@ basic_regex<_CharT, _Traits>::__match_at_start_posix_subs(
switch (__s.__do_)
{
case __state::__end_state:
+ if (__flags & regex_constants::match_not_null &&
+ __s.__current_ == __first)
+ {
+ __states.pop_back();
+ break;
+ }
if (!__matched || __highest_j < __s.__current_ - __s.__first_)
{
__highest_j = __s.__current_ - __s.__first_;
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