https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71308
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Ah, that must be mine :(.
Fix:
--- a/gcc/gimple-fold.c
+++ b/gcc/gimple-fold.c
@@ -3053,7 +3053,8 @@ gimple_fold_call (gimple_stmt_iterator *gsi, bool
inplace)
== void_type_node))
gimple_call_set_fntype (stmt, TREE_TYPE (fndecl));
/* If the call becomes noreturn, remove the lhs. */
- if (gimple_call_noreturn_p (stmt)
+ if (lhs
+ && gimple_call_noreturn_p (stmt)
&& (VOID_TYPE_P (TREE_TYPE (gimple_call_fntype (stmt)))
|| should_remove_lhs_p (lhs)))
{
