# HG changeset patch
# User Martin von Zweigbergk <martinvonz@google.com>
# Date 1498281322 25200
# Node ID a10f5f6771f67ac560e589c6a841fbebd573ca3d
# Parent  ce96efec81121eab1c8ee3ff223a924530322400
dagop: raise ProgrammingError if stopdepth < 0

revset.py should never send such a value.

diff -r ce96efec8112 -r a10f5f6771f6 mercurial/dagop.py
--- a/mercurial/dagop.py	Sat Jun 24 13:48:04 2017 +0900
+++ b/mercurial/dagop.py	Fri Jun 23 22:15:22 2017 -0700
@@ -32,8 +32,10 @@
         startdepth = 0
     if stopdepth is None:
         stopdepth = _maxlogdepth
-    if stopdepth <= 0:
+    if stopdepth == 0:
         return
+    if stopdepth < 0:
+        raise error.ProgrammingError('negative stopdepth')
 
     cl = repo.changelog