[Bug other/86656] Issues found with -fsanitize=address

[nickc at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86656
Bug 86656 depends on bug 85122, which changed state.

Bug 85122 Summary: Stack Overflow(Stack Exhaustion) in demangle related functions
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85122

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