Hi!
If lookup_name_fuzzy finds an exact match with a macro, it later in the dtor
uses node->value.macro->line in libcpp. The problem is that for builtin
macros node->value.macro contains garbage, we use node->value.builtin union
member in those cases instead. It doesn't make any sense to look up
location of a builtin macro definition anyway, those are very special
entities. So, this patch just ignores those, because we can't do anything
useful with them.
Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?
2018-01-02 Jakub Jelinek <jakub@redhat.com>
PR preprocessor/83602
* name-lookup.c (lookup_name_fuzzy): Don't use macro_use_before_def
for builtin macros.
* g++.dg/cpp/pr83602.C: New test.