converted into a qr// operator, leaving extra elements on the stack to
confuse any surrounding expression. [perl #130705]
+=item *
+
+Since 5.24.0 in some obscure cases, a regex which included code blocks
+from multiple sources (e.g. via embedded via qr// objects) could end up
+with the wrong current pad and crash or give weird results. [perl #129881]
+
+=item *
+
+Occasionally C<local()>s in a code block within a patterns weren't being
+undone when the pattern matching backtracked over the code block.
+[perl #126697]
+
=back
=head1 Known Problems