[Bug ipa/64988] [5 Regression] ICE: verify_cgraph_node failed: Alias and target's comdat groups differs with -fdeclone-ctor-dtor

[hubicka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64988

--- Comment #5 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
And concerning Jakub's question, get_alias_target will ICE when the target does
not exist :).

This is the case in corner situation (call graph construction and function
removal - where you hit it). Also weakref does not need to have a target. This
is signalized by definition flag.