http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57716
felix-gcc at fefe dot de changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |WONTFIX --- Comment #1 from felix-gcc at fefe dot de --- Never mind, this appears to be by design. http://stackoverflow.com/questions/15235885/invalid-initialization-of-non-const-reference-with-c11-thread