--- a/tests/test-topic-stack.t	Fri May 17 17:50:25 2019 +0800
+++ b/tests/test-topic-stack.t	Sat May 18 16:56:47 2019 +0800
@@ -628,6 +628,22 @@
   s1: c_D
   s0^ c_c (base)
 
+  $ hg stack -v
+  ### topic: foobar
+  ### target: default (branch), 3 behind
+  s2(ea0f882ce093)@ c_e (current)
+                  ^ c_h
+  s1(d2f548af67ab): c_D
+  s0(8522f9e3fee9)^ c_c (base)
+
+  $ hg stack --debug
+  ### topic: foobar
+  ### target: default (branch), 3 behind
+  s2(ea0f882ce093a2ad63db49083c5cb98a24a9470e)@ c_e (current)
+                                              ^ c_h
+  s1(d2f548af67ab55b08452a3e00a539319490fcd5b): c_D
+  s0(8522f9e3fee92d4ec4e688ac3fbd2ee0f8fd5036)^ c_c (base)
+
   $ hg stack foo
   ### topic: foo
   ### target: default (branch), ambiguous rebase destination - topic 'foo' has 3 heads