# HG changeset patch
# User Gregory Szorc <gregory.szorc@gmail.com>
# Date 1521227415 25200
# Node ID a82fc39224460f1bfb56f6c9d8e6b7fb0f11d8c8
# Parent  a4a95bd7158de9e932ccf5e8d60095609fbe9994
hgweb: convert an assert to a ProgrammingError

Because assert may get optimized away.

Differential Revision: https://phab.mercurial-scm.org/D2882

diff -r a4a95bd7158d -r a82fc3922446 mercurial/hgweb/webcommands.py
--- a/mercurial/hgweb/webcommands.py	Fri Jan 19 18:52:50 2018 -0800
+++ b/mercurial/hgweb/webcommands.py	Fri Mar 16 12:10:15 2018 -0700
@@ -1195,7 +1195,9 @@
         web.res.headers['Content-Encoding'] = encoding
 
     web.res.setbodywillwrite()
-    assert list(web.res.sendresponse()) == []
+    if list(web.res.sendresponse()):
+        raise error.ProgrammingError('sendresponse() should not emit data '
+                                     'if writing later')
 
     bodyfh = web.res.getbodyfile()