# HG changeset patch
# User Joerg Sonnenberger <joerg@bec.de>
# Date 1588463104 -7200
# Node ID 498dc888ff40186ba0aa6a8af1299fedf3fed21c
# Parent  aca826b5bd4d571bcf94deeec859b05bb8e2cece
stablerangecache: sanity check subranges

Try to detect invalid conditions on insert as would result in deep
recursions and final aborts much later. This has been observed on two
different machines and the check makes it hopefully possible to find the
origin of the problem.

diff -r aca826b5bd4d -r 498dc888ff40 hgext3rd/evolve/stablerangecache.py
--- a/hgext3rd/evolve/stablerangecache.py	Sun May 03 20:11:37 2020 +0800
+++ b/hgext3rd/evolve/stablerangecache.py	Sun May 03 01:45:04 2020 +0200
@@ -234,6 +234,7 @@
 
     def _setsub(self, rangeid, value):
         assert rangeid not in self._unsavedsubranges
+        assert 0 <= rangeid[1] <= rangeid[0], rangeid
         self._unsavedsubranges[rangeid] = value
         super(stablerangesqlbase, self)._setsub(rangeid, value)