1499728 - Intermittent TEST-UNEXPECTED-TIMEOUT | browser/extensions/formautofill/test/unit/test_autofillFormFields.js | Test timed out

Status: RESOLVED INCOMPLETE

(Toolkit :: Form Autofill, defect, P5)

Description

[Treeherder Bug Filer]

Filed by: ebalazs [at] mozilla.com

https://treeherder.mozilla.org/logviewer.html#?job_id=206064214&repo=autoland

https://queue.taskcluster.net/v1/task/TZL44Z10R-26Mdnab-J9Xw/runs/0/artifacts/public/logs/live_backing.log

TEST-START | uriloader/exthandler/tests/unit/test_punycodeURIs.js
04:56:07     INFO -  TEST-PASS | uriloader/exthandler/tests/unit/test_punycodeURIs.js | took 517ms
04:56:07     INFO -  Retrying tests that failed when run in parallel.
04:56:07     INFO -  TEST-START | browser/extensions/formautofill/test/unit/test_autofillFormFields.js
05:01:07  WARNING -  TEST-UNEXPECTED-TIMEOUT | browser/extensions/formautofill/test/unit/test_autofillFormFields.js | Test timed out
05:01:07     INFO -  TEST-INFO took 300001ms
05:01:07     INFO -  >>>>>>>
05:01:07     INFO -  PID 7519 | [7519, Main Thread] WARNING: Couldn't get the user appdata directory. Crash events may not be produced.: file /builds/worker/workspace/build/src/toolkit/crashreporter/nsExceptionHandler.cpp, line 2751
05:01:07     INFO -  PID 7519 | JavaScript strict warning: /Users/cltbld/tasks/task_1539774491/build/tests/xpcshell/tests/browser/extensions/formautofill/test/unit/head.js -> resource://testing-common/sinon-2.3.2.js, line 8941: ReferenceError: reference to undefined property "iso-8859-8-i"
05:01:07     INFO -  PID 7519 | JavaScript strict warning: resource://testing-common/AddonTestUtils.jsm, line 314: ReferenceError: reference to undefined property "testScope"
05:01:07     INFO -  "CONSOLE_MESSAGE: (warn) [JavaScript Warning: "ReferenceError: reference to undefined property "iso-8859-8-i"" {file: "/Users/cltbld/tasks/task_1539774491/build/tests/xpcshell/tests/browser/extensions/formautofill/test/unit/head.js -> resource://testing-common/sinon-2.3.2.js" line: 8941}]"
05:01:07     INFO -  "CONSOLE_MESSAGE: (warn) [JavaScript Warning: "ReferenceError: reference to undefined property "testScope"" {file: "resource://testing-common/AddonTestUtils.jsm" line: 314}]"
05:01:07     INFO -  (xpcshell/head.js) | test MAIN run_test pending (1)
05:01:07     INFO -  (xpcshell/head.js) | test run_next_test 0 pending (2)
05:01:07     INFO -  (xpcshell/head.js) | test MAIN run_test finished (2)
05:01:07     INFO -  running event loop
05:01:07     INFO -  browser/extensions/formautofill/test/unit/test_autofillFormFields.js | Starting head_initialize
05:01:07     INFO -  (xpcshell/head.js) | test head_initialize pending (2)
05:01:07     INFO -  PID 7519 | 1539777367829	addons.manager	DEBUG	Application has been upgraded
05:01:07     INFO -  PID 7519 | 1539777367854	addons.manager	DEBUG	Loaded provider scope for resource://gre/modules/addons/XPIProvider.jsm: ["XPIProvider", "XPIInternal"]
05:01:07     INFO -  PID 7519 | 1539777367862	addons.manager	DEBUG	Loaded provider scope for resource://gre/modules/LightweightThemeManager.jsm: ["LightweightThemeManager"]
05:01:07     INFO -  PID 7519 | 1539777367873	addons.manager	DEBUG	Loaded provider scope for resource://gre/modules/addons/GMPProvider.jsm
05:01:07     INFO -  PID 7519 | 1539777367877	addons.manager	DEBUG	Loaded provider scope for resource://gre/modules/addons/PluginProvider.jsm
05:01:07     INFO -  PID 7519 | 1539777367879	addons.manager	DEBUG	Starting provider: XPIProvider
05:01:07     INFO -  PID 7519 | 1539777367880	addons.xpi	DEBUG	startup
05:01:07     INFO -  PID 7519 | 1539777367880	addons.xpi	WARN	List of valid built-in add-ons could not be parsed.: [Exception... "Component returned failure code: 0xc1f30001 (NS_ERROR_NOT_INITIALIZED) [nsIXPCComponents_Utils.readUTF8URI]"  nsresult: "0xc1f30001 (NS_ERROR_NOT_INITIALIZED)"  location: "JS frame :: resource://gre/modules/addons/XPIProvider.jsm :: startup :: line 2111"  data: no] Stack trace: startup()@resource://gre/modules/addons/XPIProvider.jsm:2111
05:01:07     INFO -  PID 7519 | callProvider()@resource://gre/modules/AddonManager.jsm:203
05:01:07     INFO -  PID 7519 | _startProvider()@resource://gre/modules/AddonManager.jsm:651
05:01:07     INFO -  PID 7519 | startup()@resource://gre/modules/AddonManager.jsm:804
05:01:07     INFO -  PID 7519 | startup()@resource://gre/modules/AddonManager.jsm:2774
05:01:07     INFO -  PID 7519 | observe()@jar:file:///Users/cltbld/tasks/task_1539774491/build/application/Firefox%20NightlyDebug.app/Contents/Resources/omni.ja!/components/addonManager.js:66
05:01:07     INFO -  PID 7519 | promiseStartupManager()@resource://testing-common/AddonTestUtils.jsm:782
05:01:07     INFO -  PID 7519 | 1539777367889	addons.xpi	INFO	SystemAddonLocation directory is missing
05:01:07     INFO -  PID 7519 | 1539777367917	addons.xpi	INFO	Removing all system add-on upgrades.
05:01:07     INFO -  PID 7519 | 1539777367920	addons.xpi	DEBUG	checkForChanges
05:01:07     INFO -  PID 7519 | 1539777367922	addons.xpi	DEBUG	Loaded add-on state: ${}
05:01:07     INFO -  PID 7519 | 1539777367923	addons.xpi	DEBUG	scanForChanges changed: false, state: {}
05:01:07     INFO -  PID 7519 | 1539777367926	addons.xpi	DEBUG	Empty XPI database, setting schema version preference to 27
05:01:07     INFO -  PID 7519 | 1539777367926	addons.xpi	DEBUG	No changes found
05:01:07     INFO -  PID 7519 | 1539777367944	addons.manager	DEBUG	Registering shutdown blocker for XPIProvider
05:01:07     INFO -  PID 7519 | 1539777367944	addons.manager	DEBUG	Provider finished startup: XPIProvider
05:01:07     INFO -  PID 7519 | 1539777367944	addons.manager	DEBUG	Starting provider: LightweightThemeManager
05:01:07     INFO -  PID 7519 | 1539777367945	addons.manager	DEBUG	Registering shutdown blocker for LightweightThemeManager
05:01:07     INFO -  PID 7519 | 1539777367946	addons.manager	DEBUG	Provider finished startup: LightweightThemeManager
05:01:07     INFO -  PID 7519 | 1539777367948	addons.manager	DEBUG	Starting provider: GMPProvider
05:01:07     INFO -  PID 7519 | 1539777367952	addons.manager	DEBUG	Registering shutdown blocker for GMPProvider
05:01:07     INFO -  PID 7519 | 1539777367953	addons.manager	DEBUG	Provider finished startup: GMPProvider
05:01:07     INFO -  PID 7519 | 1539777367953	addons.manager	DEBUG	Starting provider: PluginProvider
05:01:07     INFO -  PID 7519 | 1539777367954	addons.manager	DEBUG	Registering shutdown blocker for PluginProvider
05:01:07     INFO -  PID 7519 | 1539777367954	addons.manager	DEBUG	Provider finished startup: PluginProvider
05:01:07     INFO -  PID 7519 | JavaScript strict warning: resource://gre/modules/LightweightThemeManager.jsm, line 769: ReferenceError: reference to undefined property "version"
05:01:07     INFO -  PID 7519 | 1539777367965	addons.manager	DEBUG	Completed startup sequence
05:01:07     INFO -  (xpcshell/head.js) | test run_next_test 0 finished (2)
05:01:07     INFO -  "CONSOLE_MESSAGE: (info) 1539777367829	addons.manager	DEBUG	Application has been upgraded"
05:01:07     INFO -  "CONSOLE_MESSAGE: (info) 1539777367854	addons.manager	DEBUG	Loaded provider scope for resource://gre/modules/addons/XPIProvider.jsm: ["XPIProvider", "XPIInternal"]"
05:01:07     INFO -  "CONSOLE_MESSAGE: (info) 1539777367862	addons.manager	DEBUG	Loaded provider scope for resource://gre/modules/LightweightThemeManager.jsm: ["LightweightThemeManager"]"
05:01:07     INFO -  "CONSOLE_MESSAGE: (info) 1539777367873	addons.manager	DEBUG	Loaded provider scope for resource://gre/modules/addons/GMPProvider.jsm"
05:01:07     INFO -  "CONSOLE_MESSAGE: (info) 1539777367877	addons.manager	DEBUG	Loaded provider scope for resource://gre/modules/addons/PluginProvider.jsm"
05:01:07     INFO -  "CONSOLE_MESSAGE: (info) 1539777367879	addons.manager	DEBUG	Starting provider: XPIProvider"
05:01:07     INFO -  "CONSOLE_MESSAGE: (info) 1539777367880	addons.xpi	DEBUG	startup"
05:01:07     INFO -  "CONSOLE_MESSAGE: (info) 1539777367880	addons.xpi	WARN	List of valid built-in add-ons could not be parsed.: [Exception... "Component returned failure code: 0xc1f30001 (NS_ERROR_NOT_INITIALIZED) [nsIXPCComponents_Utils.readUTF8URI]"  nsresult: "0xc1f30001 (NS_ERROR_NOT_INITIALIZED)"  location: "JS frame :: resource://gre/modules/addons/XPIProvider.jsm :: startup :: line 2111"  data: no] Stack trace: startup()@resource://gre/modules/addons/XPIProvider.jsm:2111
05:01:07     INFO -  callProvider()@resource://gre/modules/AddonManager.jsm:203
05:01:07     INFO -  _startProvider()@resource://gre/modules/AddonManager.jsm:651
05:01:07     INFO -  startup()@resource://gre/modules/AddonManager.jsm:804
05:01:07     INFO -  startup()@resource://gre/modules/AddonManager.jsm:2774

Comment 1

[Intermittent Failures Robot]

5 failures in 2759 pushes (0.002 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:
* autoland: 5

Platform breakdown:
* osx-10-10: 5

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2018-10-15&endday=2018-10-21&tree=all

Comment 2

[Intermittent Failures Robot]

11 failures in 2584 pushes (0.004 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:
* autoland: 6
* mozilla-inbound: 4
* mozilla-central: 1

Platform breakdown:
* osx-10-10: 11

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2018-10-22&endday=2018-10-28&tree=all

Comment 3

[Intermittent Failures Robot]

10 failures in 2978 pushes (0.003 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:
* mozilla-inbound: 5
* autoland: 5

Platform breakdown:
* osx-10-10: 10

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2018-10-29&endday=2018-11-04&tree=all

Comment 4

[Intermittent Failures Robot]

6 failures in 3007 pushes (0.002 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:
* mozilla-inbound: 3
* mozilla-central: 1
* autoland: 2

Platform breakdown:
* osx-10-10: 6

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2018-11-05&endday=2018-11-11&tree=all

Comment 5

[Intermittent Failures Robot]

8 failures in 2917 pushes (0.003 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:
* mozilla-central: 1
* autoland: 4
* mozilla-inbound: 2
* try: 1

Platform breakdown:
* osx-10-10: 8

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2018-11-12&endday=2018-11-18&tree=all

Comment 6

[Intermittent Failures Robot]

4 failures in 2387 pushes (0.002 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:
* autoland: 3
* mozilla-central: 1

Platform breakdown:
* osx-10-10: 4

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2018-11-19&endday=2018-11-25&tree=all

Comment 7

[Intermittent Failures Robot]

3 failures in 2808 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:
* mozilla-inbound: 1
* autoland: 2

Platform breakdown:
* osx-10-10: 3

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2018-11-26&endday=2018-12-02&tree=all

Comment 8

[Intermittent Failures Robot]

7 failures in 2485 pushes (0.003 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:
* autoland: 3
* mozilla-beta: 1
* mozilla-central: 1
* mozilla-inbound: 2

Platform breakdown:
* osx-10-10: 7

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2018-12-10&endday=2018-12-16&tree=all

Comment 9

[Intermittent Failures Robot]

2 failures in 2648 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:
* mozilla-beta: 1
* try: 1

Platform breakdown:
* macosx64-devedition: 1
* osx-10-10: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2018-12-17&endday=2018-12-23&tree=all

Comment 10

[Firefox Bug Husbandry Bot]

https://wiki.mozilla.org/Bug_Triage#Intermittent_Test_Failure_Cleanup

Comment 11

[Intermittent Failures Robot]

1 failures in 2378 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 1

Platform breakdown:

• osx-10-10: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2019-01-14&endday=2019-01-20&tree=all

Comment 12

[Andrei Ciure[:aciure]]

New occurrence:

https://treeherder.mozilla.org/#/jobs?repo=mozilla-inbound&resultStatus=testfailed%2Cbusted%2Cexception&classifiedState=unclassified&selectedJob=224508417&searchStr=os%2Cx%2C10.10%2Cdebug%2Cxpcshell%2Ctests%2Ctest-macosx64%2Fdebug-xpcshell%2Cx%28x%29

Comment 13

[Intermittent Failures Robot]

1 failures in 2628 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-inbound: 1

Platform breakdown:

• osx-10-10: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2019-01-28&endday=2019-02-03&tree=all

Comment 14

[Intermittent Failures Robot]

2 failures in 2658 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 2

Platform breakdown:

• osx-10-10: 2

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2019-02-04&endday=2019-02-10&tree=all

Comment 15

[Intermittent Failures Robot]

2 failures in 2832 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• try: 1
• mozilla-beta: 1

Platform breakdown:

• osx-10-10: 1
• macosx64-devedition: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2019-02-11&endday=2019-02-17&tree=all

Comment 16

[Intermittent Failures Robot]

4 failures in 2602 pushes (0.002 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 2
• mozilla-inbound: 2

Platform breakdown:

• osx-10-10: 4

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2019-02-18&endday=2019-02-24&tree=all

Comment 17

[Intermittent Failures Robot]

3 failures in 2818 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• try: 1
• mozilla-beta: 1
• autoland: 1

Platform breakdown:

• linux64: 1
• macosx64-devedition: 1
• osx-10-10: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2019-03-04&endday=2019-03-10&tree=all

Comment 18

[Intermittent Failures Robot]

2 failures in 2771 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-central: 1
• autoland: 1

Platform breakdown:

• osx-10-10: 2

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2019-03-11&endday=2019-03-17&tree=all

Comment 19

[Intermittent Failures Robot]

1 failures in 2561 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 1

Platform breakdown:

• osx-10-10: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2019-03-18&endday=2019-03-24&tree=all

Comment 20

[Intermittent Failures Robot]

1 failures in 3910 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-beta: 1

Platform breakdown:

• macosx64-devedition: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2019-03-25&endday=2019-03-31&tree=all

Comment 21

[Intermittent Failures Robot]

1 failures in 2843 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-central: 1

Platform breakdown:

• osx-10-10-shippable: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2019-04-01&endday=2019-04-07&tree=all

Comment 22

[Intermittent Failures Robot]

1 failures in 3025 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-inbound: 1

Platform breakdown:

• osx-10-10: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2019-04-08&endday=2019-04-14&tree=all

Comment 23

[Intermittent Failures Robot]

2 failures in 2673 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 2

Platform breakdown:

• osx-10-10-shippable: 1
• osx-10-10: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2019-04-15&endday=2019-04-21&tree=all

Comment 24

[Intermittent Failures Robot]

3 failures in 3031 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 2
• mozilla-inbound: 1

Platform breakdown:

• osx-10-10-shippable: 2
• osx-10-10: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2019-04-22&endday=2019-04-28&tree=all

Comment 25

[Intermittent Failures Robot]

1 failures in 4131 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 1

Platform breakdown:

• osx-10-10: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2019-04-29&endday=2019-05-05&tree=all

Comment 26

[Intermittent Failures Robot]

2 failures in 4658 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 1
• mozilla-inbound: 1

Platform breakdown:

• osx-10-10: 1
• macosx1010-64-shippable: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2019-05-13&endday=2019-05-19&tree=all

Comment 27

[Intermittent Failures Robot]

3 failures in 4730 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• try: 1
• autoland: 2

Platform breakdown:

• macosx1010-64: 1
• macosx1010-64-shippable: 2

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2019-05-20&endday=2019-05-26&tree=all

Comment 28

[Intermittent Failures Robot]

4 failures in 4337 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 2
• mozilla-beta: 1
• try: 1

Platform breakdown:

• macosx1010-64: 1
• macosx1010-64-shippable: 2
• macosx1010-64-devedition: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2019-05-27&endday=2019-06-02&tree=all

Comment 29

[Intermittent Failures Robot]

5 failures in 5197 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-inbound: 1
• mozilla-beta: 1
• try: 1
• mozilla-central: 2

Platform breakdown:

• macosx1010-64-shippable: 4
• macosx1010-64: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2019-06-03&endday=2019-06-09&tree=all

Comment 30

[Intermittent Failures Robot]

2 failures in 2581 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-beta: 2

Platform breakdown:

• macosx1010-64-shippable: 1
• macosx1010-64-devedition: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2019-06-17&endday=2019-06-23&tree=all

Comment 31

[Firefox Bug Husbandry Bot]

https://wiki.mozilla.org/Bug_Triage#Intermittent_Test_Failure_Cleanup

Comment 32

[Razvan Maries]

New occurrence: https://treeherder.mozilla.org/logviewer.html#/jobs?job_id=284785908&repo=autoland&lineNumber=4379

Comment 33

[Razvan Maries]

Fixed by commit: https://hg.mozilla.org/integration/autoland/rev/d1bd6a967ff28b0137a78b4d6bc2041068d8da3a

Comment 34

[Cristian Brindusan [:cbrindusan]]

New occurrence:
https://treeherder.mozilla.org/logviewer.html#/jobs?job_id=299054759&repo=autoland&lineNumber=3955

Comment 35

[Intermittent Failures Robot]

1 failures in 5582 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 1

Platform breakdown:

• macosx1014-64-shippable: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1499728&startday=2020-04-20&endday=2020-04-26&tree=all

Comment 36

[BugBot [:suhaib / :marco]]

https://wiki.mozilla.org/Bug_Triage#Intermittent_Test_Failure_Cleanup
For more information, please visit auto_nag documentation.