diff -r 28ce9184d495 -r 0cbf491db7ee mercurial/cmdutil.py
--- a/mercurial/cmdutil.py	Fri Feb 08 13:54:20 2019 -0800
+++ b/mercurial/cmdutil.py	Fri Feb 08 13:00:28 2019 -0800
@@ -2193,7 +2193,7 @@
                     ret = 0
             except error.LookupError:
                 ui.status(_("skipping missing subrepository: %s\n")
-                               % m.rel(subpath))
+                               % uipathfn(subpath))
 
     return ret
 
@@ -2825,7 +2825,7 @@
                 for f in names:
                     if f.startswith(path_):
                         return
-                ui.warn("%s: %s\n" % (m.rel(path), msg))
+                ui.warn("%s: %s\n" % (uipathfn(path), msg))
 
             for abs in ctx.walk(matchmod.badmatch(m, badfn)):
                 if abs not in names: