--- a/mercurial/templatekw.py	Wed Dec 27 22:27:05 2017 -0800
+++ b/mercurial/templatekw.py	Mon Mar 26 10:41:42 2018 -0700
@@ -129,8 +129,7 @@
         # If linkrev != rev (i.e. rev not found in rcache) fallback to
         # filectx logic.
         try:
-            renamed = repo[rev][fn].renamed()
-            return renamed and renamed[0]
+            return repo[rev][fn].copysource()
         except error.LookupError:
             return None