diff -r bb3f8c8c1232 -r c82a2632327e tests/test-stablesort.t
--- a/tests/test-stablesort.t	Sat Nov 25 15:14:50 2017 -0500
+++ b/tests/test-stablesort.t	Sat Nov 25 17:37:37 2017 -0500
@@ -134,6 +134,11 @@
   4c748ffd1a46
   f0f3ef9a6cd5
   1d8d22637c2d
+  $ hg showsorthead --rev 1d8d22637c2d --l 4
+  43227190fef8
+  4c748ffd1a46
+  f0f3ef9a6cd5
+  1d8d22637c2d
   $ hg showsorthead --rev b4594d867745
   1ea73414a91b
   66f7d451a68b
@@ -141,6 +146,10 @@
   2b6d669947cd
   bab5d5bf48bd
   b4594d867745
+  $ hg showsorthead --rev b4594d867745 --limit 3
+  2b6d669947cd
+  bab5d5bf48bd
+  b4594d867745
   $ hg showsorthead --rev e46a4836065c
   1ea73414a91b
   66f7d451a68b
@@ -148,6 +157,9 @@
   2b6d669947cd
   bab5d5bf48bd
   e46a4836065c
+  $ hg showsorthead --rev e46a4836065c --limit 2
+  bab5d5bf48bd
+  e46a4836065c
   $ hg showsorthead --rev ff43616e5d0f
   1ea73414a91b
   66f7d451a68b
@@ -156,6 +168,13 @@
   e7d9710d9fc6
   d62d843c9a01
   ff43616e5d0f
+  $ hg showsorthead --rev ff43616e5d0f --limit 6
+  66f7d451a68b
+  fa942426a6fd
+  2b6d669947cd
+  e7d9710d9fc6
+  d62d843c9a01
+  ff43616e5d0f
   $ hg showsorthead --rev dcbb326fdec2
   1ea73414a91b
   66f7d451a68b
@@ -164,12 +183,20 @@
   e7d9710d9fc6
   d62d843c9a01
   dcbb326fdec2
+  $ hg showsorthead --rev dcbb326fdec2 --limit 4
+  2b6d669947cd
+  e7d9710d9fc6
+  d62d843c9a01
+  dcbb326fdec2
   $ hg showsorthead --rev 2702dd0c91e7
   1ea73414a91b
   fa942426a6fd
   4c748ffd1a46
   f0f3ef9a6cd5
   2702dd0c91e7
+  $ hg showsorthead --rev 2702dd0c91e7 --limit 2
+  f0f3ef9a6cd5
+  2702dd0c91e7
 
 Verify the topological order
 ----------------------------
@@ -477,6 +504,7 @@
   $ for x in $repos; do
   >     hg -R repo_$x showsort --rev '1d8d22637c2d' > ${x}.1d8d22637c2d.order;
   >     hg -R repo_$x showsorthead --rev '1d8d22637c2d' > ${x}.1d8d22637c2d.orderhead;
+  >     hg -R repo_$x showsorthead --rev '1d8d22637c2d' --limit 4 > ${x}.1d8d22637c2d.orderhead-4;
   > done
 
   $ python "$RUNTESTDIR/md5sum.py" *.1d8d22637c2d.order
@@ -489,12 +517,18 @@
   77dc20a6f86db9103df8edaae9ad2754  B.1d8d22637c2d.orderhead
   77dc20a6f86db9103df8edaae9ad2754  C.1d8d22637c2d.orderhead
   77dc20a6f86db9103df8edaae9ad2754  D.1d8d22637c2d.orderhead
+  $ python "$RUNTESTDIR/md5sum.py" *.1d8d22637c2d.orderhead-4
+  ea12ffc0007e1b4b911d09dd478881f3  A.1d8d22637c2d.orderhead-4
+  ea12ffc0007e1b4b911d09dd478881f3  B.1d8d22637c2d.orderhead-4
+  ea12ffc0007e1b4b911d09dd478881f3  C.1d8d22637c2d.orderhead-4
+  ea12ffc0007e1b4b911d09dd478881f3  D.1d8d22637c2d.orderhead-4
 
 changeset that are not heads
 
   $ for x in $repos; do
   >     hg -R repo_$x showsort --rev 'e7d9710d9fc6+43227190fef8' > ${x}.non-heads.order;
   >     hg -R repo_$x showsorthead --rev 'e7d9710d9fc6+43227190fef8' > ${x}.non-heads.orderhead;
+  >     hg -R repo_$x showsorthead --rev 'e7d9710d9fc6+43227190fef8' --limit 6 > ${x}.non-heads.orderhead-6;
   > done
 
   $ python "$RUNTESTDIR/md5sum.py" *.non-heads.order
@@ -718,6 +752,14 @@
   0496f0a6a143
   1c645e73dbc6
   160a7a0adbf4
+  $ hg showsorthead --rev '160a7a0adbf4' --limit 7
+  5f18015f9110
+  9fff0871d230
+  4dbf739dd63f
+  d64d500024d1
+  0496f0a6a143
+  1c645e73dbc6
+  160a7a0adbf4
   $ hg showsorthead --rev '4bbfc6078919'
   1ea73414a91b
   66f7d451a68b
@@ -731,6 +773,17 @@
   a66b68853635
   013b27f11536
   4bbfc6078919
+  $ hg showsorthead --rev '4bbfc6078919' --limit 10
+  01241442b3c2
+  2dc09a01254d
+  abf57d94268b
+  529dfc5bb875
+  e7bd5218ca15
+  6ee532b68cfa
+  001194dd78d5
+  a66b68853635
+  013b27f11536
+  4bbfc6078919
   $ checktopo 'all()'
   === checking 1ea73414a91b ===
   === checking 66f7d451a68b ===
@@ -755,7 +808,7 @@
   === checking 4bbfc6078919 ===
   $ hg showsort --rev 'all()' > ../multiple.source.order
   $ hg showsorthead --rev '160a7a0adbf4' > ../160a7a0adbf4.source.orderhead
-  $ hg showsorthead --rev '4bbfc6078919' > ../4bbfc6078919.multiple.source.orderhead
+  $ hg showsorthead --rev '4bbfc6078919' > ../4bbfc6078919.source.orderhead
   $ hg log -r tip
   20 160a7a0adbf4 r20 tip
   $ cd ..
@@ -776,7 +829,7 @@
   $ hg pull --quiet
   $ hg showsort --rev 'all()' > ../multiple.random.order
   $ hg showsorthead --rev '160a7a0adbf4' > ../160a7a0adbf4.random.orderhead
-  $ hg showsorthead --rev '4bbfc6078919' > ../4bbfc6078919.multiple.random.orderhead
+  $ hg showsorthead --rev '4bbfc6078919' > ../4bbfc6078919.random.orderhead
   $ python "$RUNTESTDIR/md5sum.py" ../multiple.*.order
   a6547220a9f004c975e365d9561639dd  ../multiple.random.order
   a6547220a9f004c975e365d9561639dd  ../multiple.source.order
@@ -784,8 +837,8 @@
   48d8911f53869b32e29da26c56e95119  ../160a7a0adbf4.random.orderhead
   48d8911f53869b32e29da26c56e95119  ../160a7a0adbf4.source.orderhead
   $ python "$RUNTESTDIR/md5sum.py" ../4bbfc6078919.*.orderhead
-  3732305a333d59ec50b91db0f5ab696e  ../4bbfc6078919.multiple.random.orderhead
-  3732305a333d59ec50b91db0f5ab696e  ../4bbfc6078919.multiple.source.orderhead
+  3732305a333d59ec50b91db0f5ab696e  ../4bbfc6078919.random.orderhead
+  3732305a333d59ec50b91db0f5ab696e  ../4bbfc6078919.source.orderhead
   $ hg showsort --rev 'all()'
   1ea73414a91b
   66f7d451a68b