# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@octobus.net>
# Date 1727442326 -7200
# Node ID bb281ecf4036b6ecbecd266cb42600191cb950be
# Parent  dd3ccda3abc82ee7bdba17e7b7027737df7e3f18
rev-branch-cache: fix message about overwritten data

If there is data at the end we ignore, we should not count them as overwritten.

This reveal that we something don't overwrite anything, this will be taken car
of in the next changeset.

diff -r dd3ccda3abc8 -r bb281ecf4036 mercurial/branching/rev_cache.py
--- a/mercurial/branching/rev_cache.py	Fri Sep 27 02:27:54 2024 +0200
+++ b/mercurial/branching/rev_cache.py	Fri Sep 27 15:05:26 2024 +0200
@@ -399,8 +399,9 @@
                 threshold = current_size * REWRITE_RATIO
                 if (max(end, current_size) - start) < threshold:
                     # end affected, let overwrite the bad value
+                    overwritten = min(end, current_size) - start
                     dbg = b"overwriting %d bytes from %d in cache/%s"
-                    dbg %= (current_size - start, start, _rbcrevs)
+                    dbg %= (overwritten, start, _rbcrevs)
                     if end < current_size:
                         extra = b" leaving (%d trailing bytes)"
                         extra %= current_size - end
diff -r dd3ccda3abc8 -r bb281ecf4036 tests/test-branches.t
--- a/tests/test-branches.t	Fri Sep 27 02:27:54 2024 +0200
+++ b/tests/test-branches.t	Fri Sep 27 15:05:26 2024 +0200
@@ -835,7 +835,7 @@
   $ echo >> .hg/cache/rbc-revs-v2
   $ rm -f .hg/cache/branch* && hg head a -T '{rev}\n' --debug
   5
-  overwriting 2 bytes from 160 in cache/rbc-revs-v2 leaving (2 trailing bytes)
+  overwriting 0 bytes from 160 in cache/rbc-revs-v2 leaving (2 trailing bytes)
   $ f --size .hg/cache/rbc-revs*
   .hg/cache/rbc-revs-v2: size=162