re PR go/64198 (ICE in gofrontend)

	PR go/64198
compiler: Don't crash on invalid ++.

From-SVN: r218485

gcc/go/gofrontend/parse.cc

@@ -3190,8 +3190,11 @@ Parse::call(Expression* func)
   if (token->is_op(OPERATOR_COMMA))
     token = this->advance_token();
   if (!token->is_op(OPERATOR_RPAREN))
+    {
       error_at(this->location(), "missing %<)%>");
-  else
+      if (!this->skip_past_error(OPERATOR_RPAREN))
+	return Expression::make_error(this->location());
+    }
   this->advance_token();
   if (func->is_error_expression())
     return func;