PR c++/90265 - ICE with generic lambda.

	* pt.c (tsubst_copy_and_build): Use a dedicated variable for the last
	element in the vector.

	* g++.dg/cpp1y/lambda-generic-90265.C: New test.

From-SVN: r270917

gcc/cp/ChangeLog

+2019-05-06  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/90265 - ICE with generic lambda.
+	* pt.c (tsubst_copy_and_build): Use a dedicated variable for the last
+	element in the vector.
+
 2019-05-03  Martin Liska  <mliska@suse.cz>
 
 	* call.c (build_aggr_conv): Use is_empty instead of

gcc/cp/pt.c

@@ -18881,7 +18881,8 @@ tsubst_copy_and_build (tree t,
 	    if (thisarg)
 	      {
 		/* Shift the other args over to make room.  */
-		vec_safe_push (call_args, (*call_args)[nargs-1]);
+		tree last = (*call_args)[nargs - 1];
+		vec_safe_push (call_args, last);
 		for (int i = nargs-1; i > 0; --i)
 		  (*call_args)[i] = (*call_args)[i-1];
 		(*call_args)[0] = thisarg;

gcc/testsuite/ChangeLog

+2019-05-06  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/90265 - ICE with generic lambda.
+	* g++.dg/cpp1y/lambda-generic-90265.C: New test.
+
 2019-05-06  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/90358

gcc/testsuite/g++.dg/cpp1y/lambda-generic-90265.C

+// PR c++/90265
+// { dg-do compile { target c++14 } }
+
+void (*a)(int, int, int, void *) = [](auto, auto, auto, auto) {};