mercurial/error.py

--- a/mercurial/error.py	Sat Sep 26 12:19:39 2015 +0900
+++ b/mercurial/error.py	Fri Sep 25 12:56:05 2015 -0700
@@ -115,7 +115,7 @@
     pass
 
 # LockError is for errors while acquiring the lock -- this is unrelated
-class LockInheritanceContractViolation(AssertionError):
+class LockInheritanceContractViolation(RuntimeError):
     pass
 
 class ResponseError(Exception):