diff --git a/mercurial/copies.py b/mercurial/copies.py
--- a/mercurial/copies.py
+++ b/mercurial/copies.py
@@ -611,13 +611,6 @@
                 src, dsts2, m2, m1, mb, c1, base, copy, renamedelete
             )
 
-    renamedeleteset = set()
-    divergeset = set()
-    for dsts in diverge.values():
-        divergeset.update(dsts)
-    for dsts in renamedelete.values():
-        renamedeleteset.update(dsts)
-
     # find interesting file sets from manifests
     addedinm1 = m1.filesnotin(mb, repo.narrowmatch())
     addedinm2 = m2.filesnotin(mb, repo.narrowmatch())
@@ -634,6 +627,13 @@
     fullcopy.update(copies2)
 
     if repo.ui.debugflag:
+        renamedeleteset = set()
+        divergeset = set()
+        for dsts in diverge.values():
+            divergeset.update(dsts)
+        for dsts in renamedelete.values():
+            renamedeleteset.update(dsts)
+
         repo.ui.debug(
             b"  all copies found (* = to merge, ! = divergent, "
             b"% = renamed and deleted):\n"
@@ -649,7 +649,8 @@
             repo.ui.debug(
                 b"   src: '%s' -> dst: '%s' %s\n" % (fullcopy[f], f, note)
             )
-    del divergeset
+        del renamedeleteset
+        del divergeset
 
     repo.ui.debug(b"  checking for directory renames\n")