qlog: selecting revno 1 leads to traceback

[Alexander Belchenko]

To reproduce: Open qlog, scroll down to the beginning, select revno.1 and get traceback:

bzr: ERROR: exceptions.IndexError: tuple index out of range

Traceback (most recent call last):
  File "C:\work\Bazaar\plugins\qbzr\lib\util.py", line 987, in decorate
  File "C:\work\Bazaar\plugins\qbzr\lib\util.py", line 999, in run_in_loading_queue
  File "C:\work\Bazaar\plugins\qbzr\lib\uifactory.py", line 31, in decorate
  File "C:\work\Bazaar\plugins\qbzr\lib\log.py", line 341, in update_revision_delta
  File "C:\work\Bazaar\plugins\qbzr\lib\logwidget.py", line 303, in get_selection_top_and_parent_revids
IndexError: tuple index out of range

bzr 2.0.0 on python 2.5.4 (win32)
arguments: ['C:\\Program Files\\Bazaar\\bzr.EXE', 'qlog']
encoding: 'cp1251', fsenc: 'mbcs', lang: None
plugins:
  acad C:\work\Bazaar\plugins\acad [0.8.0]
  bzrtools C:\Program Files\Bazaar\plugins\bzrtools [2.0.0]
  explorer C:\work\Bazaar\plugins\explorer [0.8.2]
  fastimport C:\work\Bazaar\plugins\fastimport [0.9.0dev]
  format1 C:\work\Bazaar\plugins\format1 [unknown]
  launchpad C:\Program Files\Bazaar\plugins\launchpad [2.0.0]
  qbzr C:\work\Bazaar\plugins\qbzr [0.15.0dev]
  rebase C:\work\Bazaar\plugins\rebase [0.5.4dev]
  repoalias C:\work\Bazaar\plugins\repoalias [unknown]
  scmproj C:\work\Bazaar\plugins\scmproj [0.4.5]
  svn C:\Program Files\Bazaar\plugins\svn [1.0.0]
  x_bit C:\work\Bazaar\plugins\x_bit [1.0.0]

[Alexander Belchenko (bialix)]

Hmm, it seems this is not related to PageDown. Traceback window is always pop up when I select first revision:

bzr: ERROR: exceptions.IndexError: tuple index out of range

Traceback (most recent call last):
  File "C:\work\Bazaar\plugins\qbzr\lib\util.py", line 987, in decorate
  File "C:\work\Bazaar\plugins\qbzr\lib\util.py", line 999, in run_in_loading_queue
  File "C:\work\Bazaar\plugins\qbzr\lib\uifactory.py", line 31, in decorate
  File "C:\work\Bazaar\plugins\qbzr\lib\log.py", line 341, in update_revision_delta
  File "C:\work\Bazaar\plugins\qbzr\lib\logwidget.py", line 303, in get_selection_top_and_parent_revids
IndexError: tuple index out of range

bzr 2.0.0 on python 2.5.4 (win32)
arguments: ['C:\\Program Files\\Bazaar\\bzr.EXE', 'qlog']
encoding: 'cp1251', fsenc: 'mbcs', lang: None
plugins:
  acad C:\work\Bazaar\plugins\acad [0.8.0]
  bzrtools C:\Program Files\Bazaar\plugins\bzrtools [2.0.0]
  explorer C:\work\Bazaar\plugins\explorer [0.8.2]
  fastimport C:\work\Bazaar\plugins\fastimport [0.9.0dev]
  format1 C:\work\Bazaar\plugins\format1 [unknown]
  launchpad C:\Program Files\Bazaar\plugins\launchpad [2.0.0]
  qbzr C:\work\Bazaar\plugins\qbzr [0.15.0dev]
  rebase C:\work\Bazaar\plugins\rebase [0.5.4dev]
  repoalias C:\work\Bazaar\plugins\repoalias [unknown]
  scmproj C:\work\Bazaar\plugins\scmproj [0.4.5]
  svn C:\Program Files\Bazaar\plugins\svn [1.0.0]
  x_bit C:\work\Bazaar\plugins\x_bit [1.0.0]

[Alexander Belchenko (bialix)]

This problem does not affect 0.14 branch, and only presents in trunk.