# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@fb.com>
# Date 2015-08-21 00:19:56
# Node ID 4ee2af2194d4d34c61fb5649df1da445905df160
# Parent  8779ce81ea807839e7bacf7b4a594bf97dbdf232

baseset: keep the input set around

Baseset needs a list to operate, but will convert that list back to a set for
membership testing. It seems a bit silly to convert the set into a list to
convert it back afterward.

diff --git a/mercurial/revset.py b/mercurial/revset.py
--- a/mercurial/revset.py
+++ b/mercurial/revset.py
@@ -2967,6 +2967,8 @@ class baseset(abstractsmartset):
     """
     def __init__(self, data=()):
         if not isinstance(data, list):
+            if isinstance(data, set):
+                self._set = data
             data = list(data)
         self._list = data
         self._ascending = None