--- a/tests/test-amend.t Wed May 04 17:40:23 2022 +0100
+++ b/tests/test-amend.t Wed May 11 17:56:10 2022 -0700
@@ -609,3 +609,20 @@
> hg status
> fi
OK.
+
+Amending a commit that has copies but not specifying those copies shouldn't
+cause them to be lost
+
+ $ cd $TESTTMP
+ $ hg init dont-lose-copies; cd dont-lose-copies
+ $ echo r0 > r0; hg commit -qAm "r0"
+ $ hg cp r0 r0_copied; hg commit -qm "copy r0"
+ $ echo hi > new_file_amend_me
+ $ hg status --change . --copies
+ A r0_copied
+ r0
+ $ hg amend -qA new_file_amend_me
+ $ hg status --change . --copies
+ A new_file_amend_me
+ A r0_copied
+ r0 (missing-correct-output !)