--- a/hgext/histedit.py	Wed Mar 13 20:09:56 2019 -0700
+++ b/hgext/histedit.py	Tue Mar 19 22:58:39 2019 -0700
@@ -645,7 +645,7 @@
                                       fctx.path(), fctx.data(),
                                       islink='l' in flags,
                                       isexec='x' in flags,
-                                      copied=copied.get(path))
+                                      copysource=copied.get(path))
             return mctx
         return None