--- a/mercurial/configitems.py Wed Jan 13 23:07:41 2021 +0100
+++ b/mercurial/configitems.py Wed Jan 13 23:41:37 2021 +0100
@@ -1797,7 +1797,7 @@
coreconfigitem(
b'storage',
b'revlog.persistent-nodemap.slow-path',
- default=b"warn",
+ default=b"abort",
experimental=True,
)