This is PR32091,
it has next script which we failed to parse.
GLIBCXX_3.4 { extern "C++" { ... std::set_new_handler*; std::set_terminate*; std::set_unexpected*; std::type_info::__*; } }
Patch changes logic to not treat ":" as separate token to fix issue.
: is not a part of a label. It's a punctuation after a label. So please remove it.