[Bug other/63426] [meta-bug] Issues found with -fsanitize=undefined

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63426
Bug 63426 depends on bug 66827, which changed state.

Bug 66827 Summary: [6 Regression] left shifts of negative value warnings due to C++14 switch
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66827

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED