diff -r 07eef20e36b0 -r 85d213215d2c hgext/evolve.py
--- a/hgext/evolve.py	Mon Jun 23 02:19:04 2014 -0700
+++ b/hgext/evolve.py	Mon Jun 23 02:31:53 2014 -0700
@@ -350,6 +350,7 @@
     # every time this test is run, a kitten is slain.
     # Change it as soon as possible
     if '[,{metadata}]' in orig.__doc__:
+        relations = list(relations)
         for idx, rel in enumerate(relations):
             prec = rel[0]
             sucs = rel[1]