--- a/tests/test-rebase-obsolete.t Wed Sep 06 18:33:55 2017 -0700
+++ b/tests/test-rebase-obsolete.t Wed Sep 06 12:40:00 2017 -0700
@@ -1267,3 +1267,37 @@
|/
o A
+Rebasing a merge with one of its parent having a hidden successor
+
+ $ hg init $TESTTMP/merge-p1-hidden-successor
+ $ cd $TESTTMP/merge-p1-hidden-successor
+
+ $ hg debugdrawdag <<'EOS'
+ > E
+ > |
+ > B3 B2 # amend: B1 -> B2 -> B3
+ > |/ # B2 is hidden
+ > | D
+ > | |\
+ > | B1 C
+ > |/
+ > A
+ > EOS
+
+ $ eval `hg tags -T '{tag}={node}\n'`
+ $ rm .hg/localtags
+
+ $ hg rebase -r $D -d $E
+ rebasing 5:9e62094e4d94 "D"
+
+ $ hg log -G
+ o 7:a699d059adcf D
+ |\
+ | o 6:ecc93090a95c E
+ | |
+ | o 4:0dc878468a23 B3
+ | |
+ o | 1:96cc3511f894 C
+ /
+ o 0:426bada5c675 A
+