[Bug c++/60249] [c++11] Compiler goes into semi-infinite loop with wrong usage of user defined string literals

[paolo.carlini at oracle dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60249

--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Patch looks *great*. If it works, please send it to mailing list ASAP.