# HG changeset patch
# User Phil Cohen <phillco@fb.com>
# Date 2017-12-08 00:07:06
# Node ID 777cb4497d8dc0d1f45cf263a0a1513978adfa91
# Parent  dc9da4f4f363e1c7835b9e3223afdf3382fec7c6

overlayworkingctx: invalidate the manifest cache when changing parents

This fixes problems noticeable when rebasing several commits into one
destination commit using ``--collapse``. The manifest cache needs to be cleared
each time.

Differential Revision: https://phab.mercurial-scm.org/D1244

diff --git a/mercurial/context.py b/mercurial/context.py
--- a/mercurial/context.py
+++ b/mercurial/context.py
@@ -1999,6 +1999,10 @@ class overlayworkingctx(committablectx):
     def setbase(self, wrappedctx):
         self._wrappedctx = wrappedctx
         self._parents = [wrappedctx]
+        # Drop old manifest cache as it is now out of date.
+        # This is necessary when, e.g., rebasing several nodes with one
+        # ``overlayworkingctx`` (e.g. with --collapse).
+        util.clearcachedproperty(self, '_manifest')
 
     def data(self, path):
         if self.isdirty(path):