diff -r 86ea201eaeb9 -r ab0c55c2ad9a mercurial/cmdutil.py
--- a/mercurial/cmdutil.py	Tue Aug 08 17:25:38 2017 -0700
+++ b/mercurial/cmdutil.py	Wed Aug 02 18:34:39 2017 +0200
@@ -1466,8 +1466,8 @@
         labels.append('changeset.obsolete')
     if ctx.troubled():
         labels.append('changeset.troubled')
-        for trouble in ctx.troubles():
-            labels.append('trouble.%s' % trouble)
+        for instability in ctx.instabilities():
+            labels.append('trouble.%s' % instability)
     return ' '.join(labels)
 
 class changeset_printer(object):
@@ -1579,7 +1579,8 @@
 
         if ctx.troubled():
             # i18n: column positioning for "hg log"
-            self.ui.write(_("instability: %s\n") % ', '.join(ctx.troubles()),
+            instabilities = ctx.instabilities()
+            self.ui.write(_("instability: %s\n") % ', '.join(instabilities),
                           label='log.trouble')
 
         self._exthook(ctx)