https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70298
Bug ID: 70298 Summary: std::call_once hangs on second call if first threw an exception Product: gcc Version: 6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libstdc++ Assignee: unassigned at gcc dot gnu.org Reporter: anthony.ajw at gmail dot com Target Milestone: --- Created attachment 38026 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38026&action=edit call_once_bug.cpp The attached code will hang on the second call to std::call_once.