[Bug c++/120273] [15/16 regression] ICE when building corral since r15-3148-g6303cd7e41546e

[iains at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120273

--- Comment #10 from Iain Sandoe <iains at gcc dot gnu.org> ---
Maybe something like this:

diff --git a/gcc/c-family/c-lex.cc b/gcc/c-family/c-lex.cc
index fef6ae6f457..43054f105ea 100644
--- a/gcc/c-family/c-lex.cc
+++ b/gcc/c-family/c-lex.cc
@@ -109,6 +109,10 @@ get_fileinfo (const char *name)
                                     0,
                                     splay_tree_delete_pointers);

+  /* If we have an UNKOWN_LOCATION, it has no filename.  */
+  if (!name)
+    name = "<unknown file>";
+
   n = splay_tree_lookup (file_info_tree, (splay_tree_key) name);
   if (n)
     return (struct c_fileinfo *) n->value;