# HG changeset patch
# User Jordi Gutiérrez Hermoso <jordigh@octave.org>
# Date 2015-09-10 13:30:10
# Node ID e86d12404d69e48e3a82d55385cba74716a9c966
# Parent  72aad184f061fac791fc3192b39a3f37109bb0c5

dispatch: disable demandimport when invoking the debugger

Turns out that demandimport confuses pudb, which does some pretty
complicated imports. I think it's reasonable to disable demandimport
here.

diff --git a/mercurial/dispatch.py b/mercurial/dispatch.py
--- a/mercurial/dispatch.py
+++ b/mercurial/dispatch.py
@@ -181,8 +181,8 @@ def _runcatch(req):
                     debugtrace[debugger] == debugtrace['pdb']):
                     ui.warn(_("%s debugger specified "
                               "but its module was not found\n") % debugger)
-
-                debugtrace[debugger]()
+                with demandimport.disabled():
+                    debugtrace[debugger]()
             try:
                 return _dispatch(req)
             finally: