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

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86656
Bug 86656 depends on bug 81531, which changed state.

Bug 81531 Summary: Multiple Invalid reads seen by valgrind on an invalid test-case
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81531

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
         Resolution|---                         |DUPLICATE