diff -r 5ac0f2a8ba72 -r 9f798c1b0d89 mercurial/cext/revlog.c
--- a/mercurial/cext/revlog.c	Thu May 20 14:20:39 2021 -0400
+++ b/mercurial/cext/revlog.c	Sun Jun 06 01:24:30 2021 +0200
@@ -919,6 +919,7 @@
 		phasesets[i] = NULL;
 	}
 
+	free(phases);
 	return Py_BuildValue("nN", len, phasesetsdict);
 
 release: