# 
# 
# patch "tracvc/mtn/automate.py"
#  from [b4c10bd231d383b3bc39f65273ac9116d39549d7]
#    to [14c70552b4f82bff57fd19d7fc32f746a7a823a4]
# 
# patch "tracvc/mtn/backend.py"
#  from [879aa06bbc51fb1f98d54a59f691a3de7894bc73]
#    to [c8a5835923ef6dedadaebb3a828d05a0e810a067]
# 
============================================================
--- tracvc/mtn/automate.py	b4c10bd231d383b3bc39f65273ac9116d39549d7
+++ tracvc/mtn/automate.py	14c70552b4f82bff57fd19d7fc32f746a7a823a4
@@ -177,7 +177,8 @@ class MTN:
         """Returns a list of revisions selected by the selector."""
         if REVID_RULE.match(selector):
             return [selector]
-        status, result = self.automate.command("select", selector)
+        status, result = self.automate.command("select",
+                            selector.encode('utf-8'))
         if status == 0:
             return result.splitlines()
         return []
============================================================
--- tracvc/mtn/backend.py	879aa06bbc51fb1f98d54a59f691a3de7894bc73
+++ tracvc/mtn/backend.py	c8a5835923ef6dedadaebb3a828d05a0e810a067
@@ -155,6 +155,7 @@ class MonotoneRepository(Repository):
         Retrieve a Changeset object that describes the changes made in
         revision 'rev'.
         """
+        rev = self.normalize_rev(rev)
         return MonotoneChangeset(self.mtn, rev)
 
     def get_changesets(self, start, stop):
@@ -169,7 +170,7 @@ class MonotoneRepository(Repository):
             if time < start:
                 continue # assume none of the parents is younger
             elif time < stop:
-                yield MonotoneChangeset(self.mtn, current)
+                yield MonotoneChangeset(self.mtn, current) # or self.get_changeset(current)
             for parent in self.mtn.parents(current):
                 if parent not in seen:
                     seen.add(parent)
@@ -257,10 +258,10 @@ class MonotoneRepository(Repository):
         revision. It should simply be passed through.
         """
         if rev != None:
-            if isinstance(rev, unicode):
-                rev = rev.encode('ascii')
             revs = self.mtn.select(rev)
-            rev = revs and revs[0] or None
+            if len(revs) != 1:
+                raise NoSuchChangeset(rev)
+            rev = revs[0].encode('ascii')
         return rev
 
     def short_rev(self, rev):
@@ -410,10 +411,8 @@ class MonotoneChangeset(Changeset):
 class MonotoneChangeset(Changeset):
 
     def __init__(self, mtn, rev):
-        self.certs = rev and mtn.certs(rev)
-        if not self.certs:
-            raise NoSuchChangeset(rev)
 
+        self.certs = mtn.certs(rev)
         self.messages = self.certs.get('changelog', ['-'])
         self.authors = self.certs.get('author', ['-'])
         self.dates = dates(self.certs.get('date', []))