# HG changeset patch
# User Martin von Zweigbergk <martinvonz@google.com>
# Date 2018-04-06 18:26:50
# Node ID 9966f44ecab45794f33f2793ad4542e5c54320f6
# Parent  810413b745ff94685129a6ebd48a4db59cd62ec3

debugwhyunstable: add support for revsets

Differential Revision: https://phab.mercurial-scm.org/D3166

diff --git a/mercurial/debugcommands.py b/mercurial/debugcommands.py
--- a/mercurial/debugcommands.py
+++ b/mercurial/debugcommands.py
@@ -2547,7 +2547,7 @@ def debugwalk(ui, repo, *pats, **opts):
 @command('debugwhyunstable', [], _('REV'))
 def debugwhyunstable(ui, repo, rev):
     """explain instabilities of a changeset"""
-    for entry in obsutil.whyunstable(repo, repo[rev]):
+    for entry in obsutil.whyunstable(repo, scmutil.revsingle(repo, rev)):
         dnodes = ''
         if entry.get('divergentnodes'):
             dnodes = ' '.join('%s (%s)' % (ctx.hex(), ctx.phasestr())