PR c++/85256 - ICE capturing pointer to VLA.

	* lambda.c (add_capture): Distinguish between variable-size and
	variably-modified types.

From-SVN: r259240

gcc/cp/ChangeLog

+2018-04-09  Jason Merrill  <jason@redhat.com>
+
+	PR c++/85256 - ICE capturing pointer to VLA.
+	* lambda.c (add_capture): Distinguish between variable-size and
+	variably-modified types.
+
 2018-04-06  Jason Merrill  <jason@redhat.com>
 
 	PR c++/85214 - ICE with alias, generic lambda, constexpr if.

gcc/cp/lambda.c

@@ -554,13 +554,13 @@ add_capture (tree lambda, tree id, tree orig_init, bool by_reference_p,
   else if (!dependent_type_p (type)
 	   && variably_modified_type_p (type, NULL_TREE))
     {
-      error ("capture of variable-size type %qT that is not an N3639 array "
+      sorry ("capture of variably-modified type %qT that is not an N3639 array "
 	     "of runtime bound", type);
       if (TREE_CODE (type) == ARRAY_TYPE
 	  && variably_modified_type_p (TREE_TYPE (type), NULL_TREE))
 	inform (input_location, "because the array element type %qT has "
 		"variable size", TREE_TYPE (type));
-      type = error_mark_node;
+      return error_mark_node;
     }
   else
     {

gcc/testsuite/g++.dg/cpp0x/lambda/lambda-vla2.C

@@ -7,6 +7,6 @@ void f() {
   int m = 1;
   int d[n][m];
   [&]() {
-    return d[1];		// { dg-error "variabl" }
+    return d[1];		// { dg-prune-output "sorry" }
   }();
 }

gcc/testsuite/g++.dg/cpp0x/lambda/lambda-vla3.C

+// PR c++/85256
+// { dg-do compile { target c++11 } }
+// { dg-additional-options -Wno-vla }
+
+void foo(int i)
+{
+  int (*x)[i];
+  [=]{ [=]{ 0 ? x : x; }; };	// { dg-bogus "sorry" "" { xfail *-*-* } }
+
+}

gcc/testsuite/g++.dg/cpp1y/vla7.C

@@ -6,7 +6,7 @@ int main(int argc, char** argv)
 {
   int x[1][argc];
 
-  [&x](int i) {			// { dg-error "variable.size" }
-    x[0][i] = 0;	     	// { dg-prune-output "assignment" }
+  [&x](int i) {			// { dg-prune-output "sorry" }
+    x[0][i] = 0;	     	// { dg-prune-output "not captured" }
   }(5);
 }

gcc/testsuite/g++.dg/cpp1y/vla9.C

@@ -25,7 +25,7 @@ int main(){
     fa[0][1]=1.8;
     auto fx=[&](){
         for(int c=0; c<2; c++){
-            printf("use me", fa[0][c]);	// { dg-error "capture of variable-size type" }
+            printf("use me", fa[0][c]);	// { dg-prune-output "sorry" }
         }
     };
     call(fx);