diff -r 11ceb1b8fd74 -r d013099c551b mercurial/copies.py
--- a/mercurial/copies.py	Tue Jun 25 13:46:55 2019 -0700
+++ b/mercurial/copies.py	Tue Jun 25 14:25:03 2019 -0700
@@ -285,7 +285,6 @@
                     # that side, even if it was also copied on the p2 side.
                     copies[dst] = copies2[dst]
         if r == b.rev():
-            _filter(a, b, copies)
             return copies
         for i, c in enumerate(children[r]):
             childctx = repo[c]
@@ -321,7 +320,6 @@
         cm = _committedforwardcopies(a, b.p1(), match)
         # combine copies from dirstate if necessary
         copies = _chain(cm, _dirstatecopies(b._repo, match))
-        _filter(a, b, copies)
     else:
         copies  = _committedforwardcopies(a, b, match)
     return copies
@@ -373,7 +371,7 @@
             repo.ui.debug('debug.copies: search mode: combined\n')
         copies = _chain(_backwardrenames(x, a, match=match),
                         _forwardcopies(a, y, match=match))
-        _filter(x, y, copies)
+    _filter(x, y, copies)
     return copies
 
 def mergecopies(repo, c1, c2, base):