--- a/mercurial/hgweb/webutil.py	Thu Nov 23 14:13:14 2017 -0800
+++ b/mercurial/hgweb/webutil.py	Sun Nov 26 13:29:18 2017 +0800
@@ -362,7 +362,7 @@
         'extra': ctx.extra(),
         'phase': ctx.phasestr(),
         'obsolete': ctx.obsolete(),
-        'instabilities': [{"name": i} for i in ctx.instabilities()],
+        'instabilities': [{"instability": i} for i in ctx.instabilities()],
         'branch': nodebranchnodefault(ctx),
         'inbranch': nodeinbranch(repo, ctx),
         'branches': nodebranchdict(repo, ctx),