Go patch committed: Don't parse malformed receiver/parameters

[Ian Lance Taylor]

This patch from Chris Manghane fixes the Go frontend to not crash
after parsing a malformed receiver or parameter.  This fixes
https://golang.org/issue/11576 .  Bootstrapped and ran Go testsuite on
x86_64-unknown-linux-gnu.  Committed to mainline.

Ian

Index: gcc/go/gofrontend/MERGE
===================================================================
--- gcc/go/gofrontend/MERGE     (revision 226184)
+++ gcc/go/gofrontend/MERGE     (working copy)
@@ -1,4 +1,4 @@
-46117382a58843af60fc2feab68c433a96f79e79
+e4a5e2b2a9dc556685db09421a95871f195f768b
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
Index: gcc/go/gofrontend/parse.cc
===================================================================
--- gcc/go/gofrontend/parse.cc  (revision 226123)
+++ gcc/go/gofrontend/parse.cc  (working copy)
@@ -787,9 +787,11 @@ Parse::parameters(Typed_identifier_list*
   // The optional trailing comma is picked up in parameter_list.
 
   if (!token->is_op(OPERATOR_RPAREN))
-    error_at(this->location(), "expected %<)%>");
-  else
-    this->advance_token();
+    {
+      error_at(this->location(), "expected %<)%>");
+      return false;
+    }
+  this->advance_token();
 
   if (saw_error)
     return false;