From: Paul Eggert <eggert@cs.ucla.edu>
Date: Mon, 20 Feb 2017 21:03:12 +0000 (-0800)
Subject: Verify xwidget USE_LSB_TAG assumption
X-Git-Tag: emacs-26.0.90~757
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=57a8346edfbaa7a4002f2ed8cad041588dfcdd9c;p=emacs.git

Verify xwidget USE_LSB_TAG assumption

* src/xwidget.c (Fxwidget_webkit_execute_script):
Add verification.  Problem reported by Andreas Schwab (Bug#25816#8).
---

diff --git a/src/xwidget.c b/src/xwidget.c
index dc705bb1404..e6de5da8e69 100644
--- a/src/xwidget.c
+++ b/src/xwidget.c
@@ -720,6 +720,8 @@ argument procedure FUN.*/)
   GAsyncReadyCallback callback
     = FUNCTIONP (fun) ? webkit_javascript_finished_cb : NULL;
 
+  /* FIXME: The following hack assumes USE_LSB_TAG.  */
+  verify (USE_LSB_TAG);
   /* FIXME: This hack might lead to disaster if FUN is garbage
      collected before store_xwidget_js_callback_event makes it visible
      to Lisp again.  See the FIXME in webkit_javascript_finished_cb.  */