nicdumz

diff --git a/mercurial/dispatch.py b/mercurial/dispatch.py--- a/mercurial/dispatch.py+++ b/mercurial/dispatch.py@@ -169,14 +169,7 @@     except socket.error, inst:         ui.warn(_("abort: %s\n") % inst.args[-1])     except:-        ui.warn(_("** unknown exception encountered,"-                  " please report by visiting\n"))-        ui.warn(_("**  http://mercurial.selenic.com/wiki/BugTracker\n"))-        ui.warn(_("** Python %s\n") % sys.version.replace('\n', ''))-        ui.warn(_("** Mercurial Distributed SCM (version %s)\n")-               % util.version())-        ui.warn(_("** Extensions loaded: %s\n")-               % ", ".join([x[0] for x in extensions.extensions()]))+        ui.exceptionheader(unknown=True)         raise      return -1diff --git a/mercurial/ui.py b/mercurial/ui.py--- a/mercurial/ui.py+++ b/mercurial/ui.py@@ -7,7 +7,7 @@  from i18n import _ import errno, getpass, os, socket, sys, tempfile, traceback-import config, util, error+import config, util, error, extensions  class ui(object):     def __init__(self, src=None):@@ -624,3 +624,15 @@         ui.write(ui.label(s, 'label')).         '''         return msg++    def exceptionheader(self, unknown=False):+        '''useful information to output before printing a traceback'''+        if unknown:+            self.warn(_("** unknown exception encountered,"+                        " please report by visiting\n"))+            self.warn(_("**  http://mercurial.selenic.com/wiki/BugTracker\n"))+        self.warn(_("** Python %s\n") % sys.version.replace('\n', ''))+        self.warn(_("** Mercurial Distributed SCM (version %s)\n")+                 % util.version())+        self.warn(_("** Extensions loaded: %s\n")+                 % ", ".join([x[0] for x in extensions.extensions()]))