From 5328cad24f7460a39b2def12bb9b62be36c92a54 Mon Sep 17 00:00:00 2001
From: Martin Sebor <msebor@redhat.com>
Date: Fri, 4 Jun 2021 11:21:51 -0600
Subject: PR c/100783 - ICE on -Wnonnull and erroneous type

gcc/c-family/ChangeLog:

	PR c/100783
	* c-attribs.c (positional_argument): Bail on erroneous types.

gcc/c/ChangeLog:

	PR c/100783
	* c-objc-common.c (print_type): Handle erroneous types.

gcc/testsuite/ChangeLog:

	PR c/100783
	* gcc.dg/nonnull-6.c: New test.
---
 gcc/c/c-objc-common.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'gcc/c')

diff --git a/gcc/c/c-objc-common.c b/gcc/c/c-objc-common.c
index a68249d..b945de1 100644
--- a/gcc/c/c-objc-common.c
+++ b/gcc/c/c-objc-common.c
@@ -185,6 +185,12 @@ get_aka_type (tree type)
 static void
 print_type (c_pretty_printer *cpp, tree t, bool *quoted)
 {
+  if (t == error_mark_node)
+    {
+      pp_string (cpp, _("{erroneous}"));
+      return;
+    }
+
   gcc_assert (TYPE_P (t));
   struct obstack *ob = pp_buffer (cpp)->obstack;
   char *p = (char *) obstack_base (ob);
-- 
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