http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59548
--- Comment #3 from Max Kellermann ---
This is a regression by svn r195253.
>From the commit message:
"* include/debug/unordered_map.h: Undo previous commit. Default copy and move
constructors."
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59548
--- Comment #2 from Max Kellermann ---
Created attachment 31473
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31473&action=edit
Delete the implicit copy constructor in C++11 mode to detect bugs like this one
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59548
--- Comment #1 from Max Kellermann ---
Created attachment 31472
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31472&action=edit
Bug fix: call only _Base constructor, no implicit _Safe_sequence_base copy