BugBot: Bugzilla triaging bot and alerting system

This page lists all the actions done by BugBot.

Introduction

Every day hundreds of tickets are opened in Bugzilla which track the tasks, defects and enhancements needed for the development of Firefox and other Mozilla projects. Triaging and prioritizing these bugs are an essential part of our development process and we automate part of this process so as to increase our development turn around and improve the quality of our bugs metadata. The set of tools we use to improve the quality of our bugs, decrease our triaging time and help Release Management ship better quality software is called BugBot (formerly known as Autonag).

Initially created as an alerting system (by email) to our triagers, BugBot rules now also make changes to our bugs metadata on Bugzilla so as to fix inconsistencies.

If you want the bot to not make changes to a specific bug, add [no-nag] to its whiteboard field.

Active Rules

Rule 163: Variant Expiration

Purpose	Follow up on variants that need to be dropped or extended
Action	Create a bug before the variant becomes expired and follow up to extend or drop it
Code	variant_expiration.py

Detect spam bugs

Purpose	Automatically detect and handle spam bugs
Action	Close the bug as "INVALID" and move it to the "Invalid Bugs" product
Code	spambug.py

File bugs for new actionable crashes

Purpose	Automate discovering actionable crash reports to speed up fixes, reduce user impact, and save engineering time.
Action	Open a crash bug with the relevant information
Code	file_crash_bug.py

Wrong bug type

Purpose	Correct the bug type
Action	Check if the bug type is the same as predicted by bugbug, if it is different and the bot is confident, correct the type
Code	defectenhancementtask.py

Enhancement or task with the "regression", "crash" or "assertion" keyword

Purpose	Correct the bug type
Action	Change the bug type to "defect"
Code	regression_but_type_enhancement_task.py

Closed bugs with dupeme keyword

Purpose	Clean up the metadata
Action	Remove the dupeme keyword
Code	closed_dupeme.py

Bugs with dupeme in the whiteboard instead of keyword

Purpose	Clean up the metadata
Action	Replace the '[dupeme]' whiteboard tag with the 'dupeme' keyword
Code	dupeme_whiteboard_keyword.py

Bugs with no 'Has STR' and STR in the first comment

Purpose	Compleat missing metadata
Action	Set the 'Has STR' field to be 'yes'
Code	has_str_no_hasstr.py

Copy metadata from duplicates

Purpose	Increase the visibility of important information after closing a bug as a duplicate
Action	Copy missed metadata from duplicate bugs
Code	duplicate_copy_metadata.py

Bugs with small crash volume

Purpose	Identify topcrash or high severity bugs that started getting small crash volume
Action	Remove the topcrash keywords and decrease the bug severity if the crash volume is very low
Code	crash_small_volume.py

Bugs with higher severity duplicates

Purpose	Highlight inconsistency in the severity between a bug and its duplicates
Action	Needinfo the assignee and fallback to the triage owner if a duplicate bug has a higher severity value
Code	severity_higher_dups.py

Regression on nightly

Purpose	Increase the visibility of regression bugs
Action	Set nightly status flag to affected on newly filed regression bugs
Code	regression_new_set_nightly_affected.py

Remove leave-open keyword on closed bug

Purpose	Clean up a mismatch in metadata
Action	If a bug is closed but the leave-open keyword is still set, remove it
Example	Bug 1382185
Code	leave_open.py

[meta] in title but not in keywords

Purpose	Improve metedata quality
Action	Adds the meta keyword if the bug title starts by [META]
Example	Bug 1435799
Code	meta_summary_missing.py

Update Firefox Status flags for bugs reopened during Nightly cycle

Purpose	Avoids potential issues for sheriffs and release managers
Action	Set firefox-status flag back from fixed to affected
Example	Bug 1495962
Code	nightly_reopened.py

Bug with no assignee but a patch landed

Purpose	Attribute unassigned bug to the developer that fixed it
Action	The ASSIGNEE field on the bug is changed from nobody@mozilla.org to the author of the patch that landed in mozilla-central
Example	Bug 1514338
Code	no_assignee.py

Close crash bugs with no crashes over 12 weeks

Purpose	Reduce the backlog of bugs to check for Release Managers
Action	Crash bugs without any crash reports for more than 12 weeks
Example	Bug 1470864
Code	no_crashes.py

Remove stalled keyword on closed bugs

Purpose	Fix inconsistency between metadata and bug status
Action	If a bug is marked as FIXED and also has a stalled keyword set, the keyword is removed
Example	Bug 1491624
Code	stalled.py

Has meta keyword but not [meta] in the bug title

Purpose	Having [meta] in the bug title helps with quick search results
Action	If a bug has the meta keyword set, [meta] is added to the bug title
Example	Bug 1257692
Code	summary_meta_missing.py

Set a Firefox status flag for beta if there is one for nightly and release

Purpose	Fix inconsistency in Firefox status flags that can lead to a bug going undetected by Release Managers during the beta cycle
Action	If a status exists for Firefox N-1 and for Firefox N+1, guess a value for Firefox N
Example	Bug 1500273
Code	missing_beta_status.py

Add regression keywords to bugs (uses Machine Learning)

Purpose	Surface regressions not filed as such
Action	If a bug is tracked by a Release Manager, update the priority (P2 for nightly, P1 for the rest)
Example	Bug 1529139
Code	regression.py

Move untriaged bug into the correct component (uses machine learning)

Purpose	Decrease manual triage time
Action	Uses machine learning to mass move bugs in Firefox::Untriaged into a better component
Example	Bug 1530316
Code	component.py

Copy crash signature from duplicate bugs to main bugs

Purpose	Crash bugs marked as duplicate of another one may have a different crash signature. We need to consolidate all signatures in the bug where a patch to fix them is being worked on, other wise we may not fix them all
Action	If a crash bug is marked as a duplicate, the signatures it referenced are added to the new bug
Example	Bug 1517205
Code	copy_duplicate_info.py

Update release status flags based on info from the regressing bug

Purpose	Automate setting the release status flags
Action	Set release status flags to "affected" or "unaffected" based on the status flags in the regressing bug
Code	regression_set_status_flags.py

Needinfo triage owner to set severity on bugs

Purpose	Every defect should have a severity set. Also bugs with no severity set are harder to prioritize for Release Managers with regards to the release (see what-do-you-triage)
Action	The triage owner is needinfoed in Bugzilla to set a severity on bugs
Code	workflow/no_severity_ni.py

Nag triage owner to set severity on bugs

Purpose	Every defect should have a severity set. Also bugs with no severity set are harder to prioritize for Release Managers with regards to the release (see what-do-you-triage)
Action	The triage owner is nagged via email to set a severity on bugs
Code	workflow/no_severity_nag.py

Nag triage owner on P1 bugs with no activity

Purpose	Since P1 means that the bug should be fixed for the next release (see what-do-you-triage), the bug needs to show any progress in its resolution (or maybe the priority should be decreased)
Action	The triage owner is nagged via email to have a reminder
Example	Bug 1507251
Code	workflow/p1_no_activity.py

Nag triage owner to find an assignee for P1 bugs with no assignee and no activity

Purpose	Since P1 means that the bug should be fixed for the next release (see what-do-you-triage), the bug urgently needs to have an assignee (or the priority should be decreased)
Action	The triage owner is needinfoed in Bugzilla or nagged via email to find an assignee on bugs
Example	Bug 1541291
Code	workflow/p1_no_assignee.py

Change the priority from P2 to P1 on assigned bug the merge day

Purpose	Since P2 means that the bug should be fixed for the next release (see what-do-you-triage), when we are the merge day then this bug automatically becomes a P1.
Action	Update the priority to P1 and add a comment to explain.
Code	workflow/p2_merge_day.py

Patch not landed

Purpose	Identify bugs with an unlanded r+ patch. Maybe the patch is now obsolete or the bug needs to have a sheriff land the code with the checkin-needed keyword set.
Action	The bug assignee is needinfoed in Bugzilla to ask her/him to have a look
Example	Bug 1496844
Code	not_landed.py

Regression without regressed_by and some bug dependencies

Purpose	Identify regressions which have dependencies (blocks or depends_on) and an empty regressed_by, probably people forgot to use the new field.
Action	The bug assignee or the person who added some dependencies or the reporter is needinfoed to ask to fill regressed_by when it's possible.
Example	Bug 1545797
Code	regression_without_regressed_by.py

Product::Component changed after the priority has been set

Purpose	Identify bugs where Product::Component changed after the priority has been set. The priority is probably no more up-to-date and so triage owner needs to set it.
Action	Reset the priority to "--" with a comment explaining why the bot is doing that.
Example	Bug 1546366
Code	prod_comp_changed_with_priority.py

Close intermittent test failure bugs

Purpose	Close intermittent test failure bugs which are P5s, not marked leave-open, and have not had a new failure in 21 days.
Action	RESOLVE bug as INCOMPLETE with a comment explaining why the bot is doing this.
Example	Bug 1577895
Code	close_intermittents.py

Ask for a beta uplift request

Purpose	Identify bugs where a patch fixed a bug in nightly and beta is marked as affected.
Action	Needinfo the assignee to ask it's worth making an uplift request.
Example	Bug 1620434
Code	uplift_beta.py

Bisection without regressed_by

Purpose	Identify bugs which contain a bisection made by mozregression or fuzzing tools and an empty regressed_by, probably people forgot to set the field.
Action	The bug assignee or the regression author is needinfoed to ask to fill regressed_by when it's possible.
Example	Bug 1683535
Code	bisection_without_regressed_by.py

Unassign inactive bugs with the good-first-bug keyword

Purpose	Identify inactive good first bugs, to free them up for other contributors.
Action	Reset the assignee and status fields and post a comment.
Code	good_first_bug_unassign_inactive.py

Bugs with needinfo requests on inactive people

Purpose	Identify bugs that have pending needinfo on inactive users.
Action	Depending on the bug, redirect the needinfo to the triage owner, cancel the needinfo, or close the bug.
Code	inactive_ni_pending.py

Highlight topcrash bugs

Purpose	Identify topcrash bugs that are missing topcrash keywords or have low severity
Action	Add the missing keywords and needinfo to suggest increasing severity in case of a low severity
Code	topcrash_highlight.py

Approve tracking request for expiring telemetry

Purpose	Save time and eliminate unnecessary manual work
Action	Automatically approve tracking requests for bugs created by telemetry-probes@mozilla.bugs
Code	telemetry_expiry_tracking_autoapproval.py

Feature vs regression

Purpose	Fix inconsistency in bugs with both the regression and feature keywords set
Action	No action yet
Code	feature_regression.py

Inactive bugs with the leave-open keyword set

Purpose	Help identify dead/inactive bugs
Action	Needinfo the triage owner if a bug is inactive but has the leave-open keyword set
Example	Bug 1367072
Code	leave_open_no_activity.py

Inactive Meta bugs

Purpose	Help identify dead/inactive bugs
Action	Needinfo the triage owner if a meta bug has no activity and no dependencies set
Code	meta_no_deps_no_activity.py

Alert for lack of feedback in a bug

Purpose	Increase reaction time on bugs prioritized by upper management or release managers
Action	If a bug has an unanswered needinfo request from a release manager or a director, send a warning email
Code	ni_from_manager.py

Bugs with only one or two words in the summary

Purpose	Make sure the bug is actually useful, a two-words summary often indicates a poor quality bug report
Action	No action yet
Example	Bug 1512823
Code	one_two_word_summary.py

Reporter not answering to Needinfo request

Purpose	Identify bugs stalled because we need more information from the reporter to reproduce it
Action	No action yet
Code	reporter_with_ni.py

Identify tracked bugs with a NeedInfo request

Purpose	Make sure that bugs tracked for a release or nominated for tracking which also have a NeedInfo request do not get stuck
Action	Send an email
Code	tracked_needinfo.py

Tracked bugs untouched for a week

Purpose	Identify important bugs for a release which are not being acted upon
Action	Send an email
Code	tracking.py

Identify unlanded uplifts to Beta and ESR

Purpose	Make sure that we ship with the bugs that we need
Action	Send an email wih the list of bugs with uplift requests not landed on the affected branch
Example	Bug 1509394
Code	unlanded.py

Bugs with high severity in Firefox::Untriaged

Purpose	Identify potentially important issues left untriaged
Action	No action yet
Code	untriage_important_sev.py

Information about bugs landed during Soft Code Freeze

Purpose	List fixed bug with patches which landed in mozilla-central during the soft freeze week. The listing includes patch statistics.
Action	Send an email
Code	code_freeze_week.py

Hightlight Fixed bugs in nightly we may want to uplift

Purpose	Identify potentially upliftable bugs.
Action	Send an email with the recent fixes, the affected branches and metadata for prioritization
Code	missed_uplifts.py

New user with a Needinfo request

Purpose	Help identify potentially unactionable bugs per lack of information
Action	Send an email
Code	newbie_with_ni.py

Assignee is inactive

Purpose	Help identify bugs that are assigned to inactive accounts
Action	Reset the assignee, and if the bug has high priority or high severity, needinfo the triage owner
Code	assignee_no_login.py

Bugs with inconsistent severity flags

Purpose	Make sure that bugs severity is consistent with the accessibility severity on the Whiteboard
Action	Needinfo the assignee or the triage owner if not assigned yet
Code	severity_inconsistency.py

Regression bugs where the regressor author is not involved

Purpose	Highlight regressions to people who caused them
Action	Needinfo the assignee of the bug that caused the regression
Code	needinfo_regression_author.py

Bugs with high security keywords which are set to low severity

Purpose	Identify bugs whose severity field is set to S3 or S4 and at the same time have sec-high or sec-critical keywords
Action	Needinfo to propose increasing the severity
Code	severity_high_security.py

Bugs with P1 WebCompat priority and severity set to low

Purpose	Consistency and getting traction on important web compatibility bugs
Action	Needinfo the assignee or the triage owner if not assigned yet
Code	severity_high_compat_priority.py

Automatically confirm bugs that have an affected Firefox version flag

Purpose	Fix inconsistency in the status of unconfirmed bugs
Action	Confirm bugs with affected Firefox version flags by changing the status to "NEW"
Code	affected_flag_confirm.py

Automatically confirm bugs that have a crash signature

Purpose	Fix inconsistency in the status of unconfirmed bugs
Action	Confirm bugs with crash signatures by changing the status to "NEW"
Code	crash_signature_confirm.py

Bugs with patches after being closed

Purpose	Identify bugs that receive patches after being closed
Action	Comment on the bug and email release managers
Code	patch_closed_bug.py

Bugs with underestimated severity levels

Purpose	Identify bugs whose severity could be underestimated
Action	Needinfo the assignee or the triage owner if not assigned yet
Code	severity_underestimated.py

Components with triage owner need to be assigned

Purpose	Identify components whose triage owners are unassigned, disabled, or inactive
Action	Nag managers to assign triage owners
Code	vacant_triage_owner.py

Tracked bugs that need attention

Purpose	Notify about tracked bugs with no assignee, low severity, or low priority
Action	Needinfo the team manager and fallback on the triage owner if we have no team manager defined in our config
Code	tracked_attention.py

Bugs with inactive patch reviewers

Purpose	Unblock bugs by identifying patches that are waiting for review from or unavailable reviewers
Action	Needinfo patch authors to find active reviewers
Code	inactive_reviewer.py

Fuzz blocker bugs

Purpose	Bring attention to bugs that prevent fuzzing from making progress
Action	Send weekly reminder emails and suggest increasing the severity when it is low.
Code	fuzz_blockers.py

Severity of performance impacting bugs

Purpose	Consistency and help getting traction on bugs with a high impact on performance
Action	Needinfo the assignee or the triage owner (if not assigned) to increase the severity
Code	severity_high_performance_impact.py

Bugs with a high number of recent regressions

Purpose	Highlight bugs that introduce a high number of regressions
Action	Notify release managers
Code	warn_regressed_by.py

Bugs with whiteboard reminders

Purpose	Remind about future tasks
Action	Post a reminder on the bug and remove the reminder whiteboard tag
Code	reminder.py

Bugs to triage

Purpose	Highlight defect bugs that need to be triaged
Action	Notify the triage owner
Code	to_triage.py

Bugs moved to Core::Performance

Purpose	Make sure the bug has the basic information needed for performance bugs.
Action	Add a needinfo request when a bug is moved to Core::Performance to ask for missed information.
Code	moved_to_performance.py

Uh-hide duplicate security bugs

Purpose	Publish security bugs that are already fixed and safe to be public.
Action	Send emails to people in the security team to highlight security bugs which are duplicates of already-public bugs.
Code	security_unhide_dups.py

Label WebCompat platform bugs

Purpose	Ensure core bugs blocking webcompat knowledge base entries have webcompat:platform-bug keyword.
Action	Add webcompat:platform-bug keyword where it's missing
Code	webcompat_platform_without_keyword.py

Bugs with the [webcompat:sightline] whiteboard tag updated

Purpose	Ensure webcompat bugs affecting a sightline top 1000 site have the appropriate keyword set
Action	Add [webcompat:sightline] whiteboard tag where it's missing, or remove it when it shouldn't be set
Code	webcompat_sightline.py

Inactive performance regressions

Purpose	Ensure progress continues on resolving performance regressions.
Action	Needinfo author of regressor after a period of inactivity.
Code	perfalert_inactive_regression.py

Performance regression resolution monitoring

Purpose	Ensure proper resolutions are provided for performance alerts, and request resolution reasoning if needed.
Action	Needinfo individual who resolved alert when resolution reasoning is not provided, and provide summary emails of resolution changes.
Code	perfalert_resolved_regression.py

Removed Rules

Fuzzing bisection without regressed_by

Purpose	Identify bugs which contain a bisection made by fuzzing tools and an empty regressed_by, probably people forgot to set the field.
Action	The bug assignee is needinfoed to ask to fill regressed_by when it's possible.
Example	Bug 1683535
Note	Replaced with Bisection without regressed_by

Bugs with top-crash signatures

Purpose	Identify bugs that are missing topcrash or topcrash-startup keywords
Action	Add the missing keyword and needinfo to suggest increasing severity in case of a low severity
Note	Replaced with Highlight topcrash bugs

Top crashers with low severity

Purpose	Consistency and help getting traction on top-crash bugs
Action	Needinfo the assignee or the triage owner if not assigned yet
Example	Bug 1471692
Note	Replaced with Highlight topcrash bugs

Low severity bugs with tracking status

Purpose	Suggest increasing the severity for bugs that are marked as blocking or are tracked for nightly, beta, or release
Action	Needinfo the assignee or the triage owner if not assigned yet
Note	Dropped in favor of Tracked bugs that need attention

Increase severity of bugs tracked by Release Managers

Purpose	Fix inconsistency in metadata
Action	If a bug is tracked for an upcoming release but it's severity field is low, the severity is increased
Example	Bug 1538966
Note	Dropped in favor of Tracked bugs that need attention

Bugs with STR and no regression range

Purpose	Compleat missing metadata
Action	Needinfo the bug creator to find the regression range
Note	Removed on 2024-02-13

Nag triage owner to set severity on bugs

Purpose	Every defect should have a severity set. Also bugs with no severity set are harder to prioritize for Release Managers with regards to the release (see what-do-you-triage)
Action	The triage owner is needinfoed in Bugzilla or nagged via email to set a severity on bugs
Note	Split into two rules: Needinfo triage owner to set severity on bugs and Nag triage owner to set severity on bugs