dirstate: use tuple interface to fix leak in pack_dirstate() Spotted by ASAN. Unlike PyTuple_GET_ITEM(), PySequence_ITEM() returns a new reference. This bug could be fixed by inserting Py_CLEAR() and Py_XDECREF() appropriately, but I think requiring a tuple object is simpler and less error-prone. The cext version is jumped to 10 since 6..9 are used in the default branch. We'll need to bump it again at merge.

--- a/mercurial/policy.py	Wed Sep 05 22:10:41 2018 +0900
+++ b/mercurial/policy.py	Wed Sep 05 20:52:22 2018 +0900
@@ -69,7 +69,7 @@
     (r'cext', r'bdiff'): 3,
     (r'cext', r'mpatch'): 1,
     (r'cext', r'osutil'): 4,
-    (r'cext', r'parsers'): 5,
+    (r'cext', r'parsers'): 10,
 }
 
 # map import request to other package or module