Edit a bug and add the same tag twice causes oops

Bug #98614 reported by Diogo Matsubara
4
Affects Status Importance Assigned to Milestone
Launchpad itself
Fix Released
Critical
Edwin Grubbs

Bug Description

Steps to reproduce (using sample data):

1. Open http://launchpad.dev/ubuntu/+bug/2/+edit
2. Enter the 'pebcak' tag again in the Tags: field
3. Click 'Change'
4. Crash like OOPS-450A1404

Module canonical.launchpad.mailnotification, line 672, in notify_bug_modified
    assert bug_delta is not None
AssertionError

Tags: lp-bugs oops
Changed in malone:
status: Unconfirmed → Confirmed
Changed in malone:
assignee: nobody → bjornt
Revision history for this message
Christian Reis (kiko) wrote :

Happens sometimes in our OOPSers.

Changed in malone:
importance: Undecided → High
Revision history for this message
Björn Tillenius (bjornt) wrote :

This bug doesn't happen that often, but still, it's not good to produce OOPSes.

Changed in malone:
assignee: bjornt → edwin-grubbs
Revision history for this message
Christian Reis (kiko) wrote :

Happening enough to be cherry-pickable.

Changed in malone:
importance: High → Critical
Changed in malone:
status: Confirmed → In Progress
Changed in malone:
status: In Progress → Fix Committed
Revision history for this message
Edwin Grubbs (edwin-grubbs) wrote :

Fixed on launchpad.net

Changed in malone:
status: Fix Committed → Fix Released
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