--- a/tests/test-evolve.t	Sat Jun 13 11:14:07 2015 -0700
+++ b/tests/test-evolve.t	Wed May 20 12:46:13 2015 -0700
@@ -1248,3 +1248,57 @@
   o  25:4c0bc042ef3b@default(draft) add j1
   |
 
+Check that uncommit respects the allowunstable option
+With only createmarkers we can only uncommit on a head
+  $ hg up 456e647fbe11
+  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ cat >> $HGRCPATH <<EOF
+  > [experimental]
+  > evolution=createmarkers, allnewcommands
+  > EOF
+  $ glog -r "25::"
+  @  52:456e647fbe11@default(draft) add c4_
+  |
+  o  51:07aaa06da467@default(draft) add c3_
+  |
+  | o  50:e543e9e71376@default(draft) add b4_
+  | |
+  o |  49:9379d7237601@default(draft) add c2prime
+  | |
+  | o  48:2b5cbe59aeca@default(draft) add b3prime
+  | |
+  | o  47:aa4f5bf8925e@default(draft) add b1prime
+  | |
+  o |  42:4a34f6744d4b@default(draft) add c1second
+  |/
+  o  25:4c0bc042ef3b@default(draft) add j1
+  |
+  $ hg up .^
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ hg uncommit --all
+  abort: cannot uncommit in the middle of a stack
+  [255]
+  $ hg up 456e647fbe11
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg uncommit --all
+  new changeset is empty
+  (use "hg prune ." to remove it)
+  $ hg up e543e9e71376 -C
+  3 files updated, 0 files merged, 3 files removed, 0 files unresolved
+  $ glog -r "25::"
+  o  53:897e7966b9ef@default(draft) add c4_
+  |
+  o  51:07aaa06da467@default(draft) add c3_
+  |
+  | @  50:e543e9e71376@default(draft) add b4_
+  | |
+  o |  49:9379d7237601@default(draft) add c2prime
+  | |
+  | o  48:2b5cbe59aeca@default(draft) add b3prime
+  | |
+  | o  47:aa4f5bf8925e@default(draft) add b1prime
+  | |
+  o |  42:4a34f6744d4b@default(draft) add c1second
+  |/
+  o  25:4c0bc042ef3b@default(draft) add j1
+  |