[Bug ada/89349] segfault when building GCC 7 & 8 branch with GCC master

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89349

--- Comment #17 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Eric Botcazou from comment #16)
> .

Thank you Erik for the fix!