2021-01-19  Jakub Jelinek  <jakub@redhat.com>

	PR c++/98742
	* semantics.c (finish_omp_clauses) <case OMP_CLAUSE_DETACH>: If
	error_operand_p, remove clause without further checking.  Check
	for non-NULL TYPE_NAME.

	* c-c++-common/gomp/task-detach-2.c: New test.

--- gcc/cp/semantics.c.jj	2021-01-16 22:52:33.608413922 +0100
+++ gcc/cp/semantics.c	2021-01-19 10:53:07.979801786 +0100
@@ -7430,12 +7430,18 @@ finish_omp_clauses (tree clauses, enum c
 	      remove = true;
 	      break;
 	    }
+	  else if (error_operand_p (t))
+	    {
+	      remove = true;
+	      break;
+	    }
 	  else
 	    {
 	      tree type = TYPE_MAIN_VARIANT (TREE_TYPE (t));
 	      if (!type_dependent_expression_p (t)
 		  && (!INTEGRAL_TYPE_P (type)
 		      || TREE_CODE (type) != ENUMERAL_TYPE
+		      || TYPE_NAME (type) == NULL_TREE
 		      || (DECL_NAME (TYPE_NAME (type))
 			  != get_identifier ("omp_event_handle_t"))))
 		{
--- gcc/testsuite/c-c++-common/gomp/task-detach-2.c.jj	2021-01-19 11:07:29.345948289 +0100
+++ gcc/testsuite/c-c++-common/gomp/task-detach-2.c	2021-01-19 11:06:57.090317518 +0100
@@ -0,0 +1,9 @@
+/* PR c++/98742 */
+/* { dg-do compile } */
+
+void
+foo ()
+{
+#pragma omp task detach(0)	/* { dg-error "before numeric constant" } */
+  ;
+}