timeline bug when handling a subset of a repository

[ndelon@…]

When trac is handling a subset of a svn repository, only the last changeset is shown in the timeline. It seems to be caused by a bad list index check in the previous_rev method of the "SubversionRepository" class. The following patch fixed the problem for me.

Index: trac/versioncontrol/svn_fs.py
===================================================================
--- trac/versioncontrol/svn_fs.py       (revision 2015)
+++ trac/versioncontrol/svn_fs.py       (working copy)
@@ -233,7 +233,7 @@
         if self.scope == '/':
             return rev - 1
         idx = self.history.index(rev)
-        if idx > 0:
+        if idx + 1 < len(self.history):
             return self.history[idx + 1]
         return None

[ndelon@…]

bug fix patch

[Jonas Borgström]

Good catch, applied in [2019].