Don't crash on tuple initialization from erroneous channel.

From-SVN: r167882

diff --git a/gcc/go/gofrontend/gogo.cc b/gcc/go/gofrontend/gogo.cc
index 39072e075b1f7a0be2e15ac7e16426a51fdbae03..b27871132e33b7ac0ef7d83bf3776c3fa7659cbc 100644 (file)
--- a/gcc/go/gofrontend/gogo.cc
+++ b/gcc/go/gofrontend/gogo.cc
@@ -3126,7 +3126,10 @@ Variable::type_from_tuple(Expression* expr, bool report_error) const
   else if (expr->receive_expression() != NULL)
     {
       Expression* channel = expr->receive_expression()->channel();
-      return channel->type()->channel_type()->element_type();
+      Type* channel_type = channel->type();
+      if (channel_type->is_error_type())
+       return Type::make_error_type();
+      return channel_type->channel_type()->element_type();
     }
   else
     {