diff -r cc9aa88792fe -r ec37df9042f9 mercurial/logcmdutil.py
--- a/mercurial/logcmdutil.py	Sat May 26 12:38:07 2018 +0900
+++ b/mercurial/logcmdutil.py	Mon Mar 26 10:49:01 2018 -0700
@@ -865,7 +865,7 @@
             for fn in ctx.files():
                 rename = getrenamed(fn, ctx.rev())
                 if rename:
-                    copies.append((fn, rename[0]))
+                    copies.append((fn, rename))
         edges = edgefn(type, char, state, rev, parents)
         firstedge = next(edges)
         width = firstedge[2]
@@ -893,7 +893,7 @@
             for fn in ctx.files():
                 rename = getrenamed(fn, rev)
                 if rename:
-                    copies.append((fn, rename[0]))
+                    copies.append((fn, rename))
         displayer.show(ctx, copies=copies)
         displayer.flush(ctx)
     displayer.close()