# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@octobus.net>
# Date 1708642893 -3600
# Node ID c9c017b344643bc78d862939e94e029c3b85c564
# Parent  e0d3294917091a196af5b6977c84378ea467f553
phasees: properly shallow caopy the phase sets dictionary

We are about to increments the set more incrementally in some case, so we need
to make a proper shallow copy of it.

diff -r e0d329491709 -r c9c017b34464 mercurial/phases.py
--- a/mercurial/phases.py	Wed Feb 21 14:42:13 2024 +0100
+++ b/mercurial/phases.py	Fri Feb 23 00:01:33 2024 +0100
@@ -471,7 +471,10 @@
         ph._phaseroots = self._phaseroots.copy()
         ph.dirty = self.dirty
         ph._loadedrevslen = self._loadedrevslen
-        ph._phasesets = self._phasesets
+        if self._phasesets is None:
+            ph._phasesets = None
+        else:
+            ph._phasesets = self._phasesets.copy()
         return ph
 
     def replace(self, phcache):