--- a/mercurial/revset.py Fri Oct 21 12:07:27 2011 +0100
+++ b/mercurial/revset.py Fri Oct 21 12:12:21 2011 -0500
@@ -1068,6 +1068,8 @@
'(10 or 11):: and ((this()) or (that()))'
>>> formatspec('%d:: and not %d::', 10, 20)
'10:: and not 20::'
+ >>> formatspec('%ld or %ld', [], [1])
+ '(0-0) or (1)'
>>> formatspec('keyword(%s)', 'foo\\xe9')
"keyword('foo\\\\xe9')"
>>> b = lambda: 'default'
@@ -1111,7 +1113,10 @@
# a list of some type
pos += 1
d = expr[pos]
- lv = ' or '.join(argtype(d, e) for e in args[arg])
+ if args[arg]:
+ lv = ' or '.join(argtype(d, e) for e in args[arg])
+ else:
+ lv = '0-0' # a minimal way to represent an empty set
ret += '(%s)' % lv
arg += 1
else: