re PR c++/84618 (ICE in build_capture_proxy, at cp/lambda.c:460)

/cp
2018-03-05  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/84618
	* parser.c (cp_parser_lambda_introducer): Reject any capture not
	involving a VAR_DECL or a PARM_DECL.

/testsuite
2018-03-05  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/84618
	* g++.dg/cpp0x/lambda/lambda-ice29.C: New.
	* g++.dg/cpp0x/lambda/lambda-ice17.C: Adjust.
	* g++.dg/cpp0x/lambda/lambda-ice23.C: Likewise.

From-SVN: r258250

gcc/cp/ChangeLog

+2018-03-05  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/84618
+	* parser.c (cp_parser_lambda_introducer): Reject any capture not
+	involving a VAR_DECL or a PARM_DECL.
+
 2018-03-05  Pádraig Brady  <P@draigBrady.com>
 	    Jason  Merrill  <jason@redhat.com>
 	    Nathan Sidwell  <nathan@acm.org>

gcc/cp/parser.c

@@ -10377,13 +10377,13 @@ cp_parser_lambda_introducer (cp_parser* parser, tree lambda_expr)
 	      unqualified_name_lookup_error (capture_id);
 	      continue;
 	    }
-	  else if (DECL_P (capture_init_expr)
-		   && (!VAR_P (capture_init_expr)
-		       && TREE_CODE (capture_init_expr) != PARM_DECL))
+	  else if (!VAR_P (capture_init_expr)
+		   && TREE_CODE (capture_init_expr) != PARM_DECL)
 	    {
 	      error_at (capture_token->location,
-			"capture of non-variable %qD ",
+			"capture of non-variable %qE ",
 			capture_init_expr);
+	      if (DECL_P (capture_init_expr))
 		inform (DECL_SOURCE_LOCATION (capture_init_expr),
 			"%q#D declared here", capture_init_expr);
 	      continue;

gcc/testsuite/ChangeLog

+2018-03-05  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/84618
+	* g++.dg/cpp0x/lambda/lambda-ice29.C: New.
+	* g++.dg/cpp0x/lambda/lambda-ice17.C: Adjust.
+	* g++.dg/cpp0x/lambda/lambda-ice23.C: Likewise.
+
 2018-03-05  Olga Makhotina  <olga.makhotina@intel.com>
 
 	* g++.dg/other/i386-2.C: Add -mpconfig and -mwbnoinvd.

gcc/testsuite/g++.dg/cpp0x/lambda/lambda-ice17.C

@@ -5,7 +5,7 @@ void foo (int);
 
 void foo (void)
 {
-  [&foo] // { dg-error "cannot capture" }
+  [&foo] // { dg-error "5:capture of non-variable" }
   {
     foo (0);
   };

gcc/testsuite/g++.dg/cpp0x/lambda/lambda-ice23.C

@@ -3,7 +3,7 @@
 
 template <typename T>
 constexpr int r(T x) {
-  auto f = [r,x]() { return r(x); }; // { dg-error "incomplete type" }
+  auto f = [r,x]() { return r(x); }; // { dg-error "13:capture of non-variable" }
   return 0;
 }
 

gcc/testsuite/g++.dg/cpp0x/lambda/lambda-ice29.C

+// PR c++/84618
+// { dg-do compile { target c++11 } }
+
+template <int>
+struct S {
+  void b() const;
+  void b() { [b] {}; } // { dg-error "15:capture of non-variable" }
+};