--- a/mercurial/hgweb/webutil.py	Sun Nov 19 04:11:21 2017 +0100
+++ b/mercurial/hgweb/webutil.py	Sun Nov 19 13:18:54 2017 +0800
@@ -362,6 +362,7 @@
         'extra': ctx.extra(),
         'phase': ctx.phasestr(),
         'obsolete': ctx.obsolete(),
+        'instabilities': [{"name": i} for i in ctx.instabilities()],
         'branch': nodebranchnodefault(ctx),
         'inbranch': nodeinbranch(repo, ctx),
         'branches': nodebranchdict(repo, ctx),