phases: explicitly evaluate list returned by map
On Python 3 map() returns a generator, which bool()s to true even if
it had an empty input set. Work around this by using list() on the
map() result.
--- a/mercurial/phases.py Sat Mar 11 20:51:09 2017 -0500
+++ b/mercurial/phases.py Sat Mar 11 20:53:20 2017 -0500
@@ -213,7 +213,7 @@
self._phaserevs = revs
self._populatephaseroots(repo)
for phase in trackedphases:
- roots = map(repo.changelog.rev, self.phaseroots[phase])
+ roots = list(map(repo.changelog.rev, self.phaseroots[phase]))
if roots:
for rev in roots:
revs[rev] = phase