# HG changeset patch
# User Augie Fackler <raf@durin42.com>
# Date 1352675575 21600
# Node ID 4d9e2d2a2c192fff39d95ee08c95bee8b57b2404
# Parent  24d4741674a651ea63007b1179829905fc130624# Parent  1ab57b19cb3aa0792b96be7f26307d0b591ed609
Merge

diff --git a/hggit/git_handler.py b/hggit/git_handler.py
--- a/hggit/git_handler.py
+++ b/hggit/git_handler.py
@@ -1023,8 +1023,14 @@
         for tag, sha in self.repo.tags().iteritems():
             if self.repo.tagtype(tag) in ('global', 'git'):
                 tag = tag.replace(' ', '_')
-                self.git.refs['refs/tags/' + tag] = self.map_git_get(hex(sha))
-                self.tags[tag] = hex(sha)
+                target = self.map_git_get(hex(sha))
+                if target is not None:
+                    self.git.refs['refs/tags/' + tag] = target
+                    self.tags[tag] = hex(sha)
+                else:
+                    self.repo.ui.warn(
+                        'Skipping export of tag %s because it '
+                        'has no matching git revision.' % tag)
 
     def _filter_for_bookmarks(self, bms):
         if not self.branch_bookmark_suffix: