# HG changeset patch
# User Martin von Zweigbergk <martinvonz@google.com>
# Date 2018-04-25 16:24:07
# Node ID ee3d58b4a47fda30f66d3f710a9b1478a259a760
# Parent  877185de62cf6933142118c87eb702a77f0896fb

revlog: make pure version of _partialmatch() support 40-byte hex nodeids

Without this patch, test-histedit-arguments.t would fail when run with
--pure. It turned out to be because the pure version of
_partialmatch() does not support full 40-byte hex nodeids. When
histedit's instructions include things like "pick tip", it resolves
the "tip" revision early to a full nodeid (but plain hex nodeid
prefixes are not resolved to full nodeids). Then the nodeid (full or
not) is looked up using to a full nodeid later. This step is what
fails in pure mode. It has been failing since my c4131138eadb
(histedit: look up partial nodeid as partial nodeid, 2018-04-06). I
haven't verified, but I suspect histedit instructions like "pick <full
hex nodeid>" would have been failing before my commit too, though.

The fix is trivial: change a "< 40" to "<= 40".

Differential Revision: https://phab.mercurial-scm.org/D3428

diff --git a/mercurial/revlog.py b/mercurial/revlog.py
--- a/mercurial/revlog.py
+++ b/mercurial/revlog.py
@@ -1466,7 +1466,7 @@ class revlog(object):
         if id in self._pcache:
             return self._pcache[id]
 
-        if len(id) < 40:
+        if len(id) <= 40:
             try:
                 # hex(node)[:...]
                 l = len(id) // 2  # grab an even number of digits