# HG changeset patch
# User Augie Fackler <augie@google.com>
# Date 2020-02-05 21:16:15
# Node ID 48a1a974a92c273444c09e779bfb8d62ceb5a941
# Parent  aa0fc32ece9e67f72bf681f4991a02fba62b1d5b

manifest: fix _very_ subtle bug with exact matchers passed to walk()

Prior to this fix, manifestdict.walk() with an exact matcher would blindly
list the files in the matcher, even if they weren't in the manifest. This was
exposed by my next patch where I rewrite filesnotin() to use walk() instead of
matches().

Differential Revision: https://phab.mercurial-scm.org/D8081

diff --git a/mercurial/manifest.py b/mercurial/manifest.py
--- a/mercurial/manifest.py
+++ b/mercurial/manifest.py
@@ -530,7 +530,8 @@ class manifestdict(object):
         # avoid the entire walk if we're only looking for specific files
         if self._filesfastpath(match):
             for fn in sorted(fset):
-                yield fn
+                if fn in self:
+                    yield fn
             return
 
         for fn in self: