1949307 - Intermittent LeakSanitizer leak at Alloc, AllocCharsForFlatten, JSRope::flattenInternal, flattenInternal | single tracking bug

Status: NEW

(Core :: DOM: Core & HTML, defect, P5)

Description

[Treeherder Bug Filer]

Filed by: agoloman [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=495743630&repo=autoland
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/DK-4boenQQGDqyNDveopyQ/runs/0/artifacts/public/logs/live_backing.log

---

[task 2025-02-19T23:18:28.671Z] 23:18:28     INFO - GECKO(2684) | SUMMARY: AddressSanitizer: 1449795 byte(s) leaked in 7180 allocation(s).
[task 2025-02-19T23:18:28.761Z] 23:18:28     INFO - TEST-INFO | Main app process: exit 0
[task 2025-02-19T23:18:28.762Z] 23:18:28     INFO - TEST-INFO | LeakSanitizer | To show the addresses of leaked objects add report_objects=1 to LSAN_OPTIONS
[task 2025-02-19T23:18:28.762Z] 23:18:28     INFO - TEST-INFO | LeakSanitizer | This can be done in testing/mozbase/mozrunner/mozrunner/utils.py
[task 2025-02-19T23:18:28.763Z] 23:18:28    ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer leak at Alloc, AllocCharsForFlatten, JSRope::flattenInternal, flattenInternal | browser/components/firefoxview/tests/browser/browser.toml
[task 2025-02-19T23:18:28.763Z] 23:18:28    ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer leak at Alloc, nsTSubstring, Gecko_StartBulkWriteString, nsstring::nsAString::start_bulk_write_impl::hf94613f0a2889958 | browser/components/firefoxview/tests/browser/browser.toml
[task 2025-02-19T23:18:28.763Z] 23:18:28    ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer leak at Alloc, nsTSubstring, nsTSubstring, Assign | browser/components/firefoxview/tests/browser/browser.toml
[task 2025-02-19T23:18:28.764Z] 23:18:28    ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer leak at Alloc, nsTSubstring, nsTSubstring, AssignJSString | browser/components/firefoxview/tests/browser/browser.toml
[task 2025-02-19T23:18:28.764Z] 23:18:28    ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer leak at Alloc, nsTSubstring, nsTSubstring, CacheValue | browser/components/firefoxview/tests/browser/browser.toml
[task 2025-02-19T23:18:28.765Z] 23:18:28    ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer leak at Alloc, nsTSubstring, nsTSubstring, mozilla::net::nsStandardURL::BuildNormalizedSpec | browser/components/firefoxview/tests/browser/browser.toml
[task 2025-02-19T23:18:28.765Z] 23:18:28    ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer leak at Alloc, nsTSubstring, nsTSubstring, nsTSubstring | browser/components/firefoxview/tests/browser/browser.toml
[task 2025-02-19T23:18:28.766Z] 23:18:28    ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer leak at Allocate, nsNodeInfoManager::Allocate, NS_NewBasicXULElement, nsXULElement::Construct | browser/components/firefoxview/tests/browser/browser.toml
[task 2025-02-19T23:18:28.766Z] 23:18:28    ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer leak at Allocate, nsNodeInfoManager::Allocate, NS_NewHTMLElement, nsContentUtils::NewXULOrHTMLElement | browser/components/firefoxview/tests/browser/browser.toml
[task 2025-02-19T23:18:28.766Z] 23:18:28    ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer leak at Allocate, nsNodeInfoManager::Allocate, NS_NewHTMLImageElement, CreateHTMLElement | browser/components/firefoxview/tests/browser/browser.toml
[task 2025-02-19T23:18:28.767Z] 23:18:28    ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer leak at Allocate, nsNodeInfoManager::Allocate, NS_NewHTMLLinkElement, CreateHTMLElement | browser/components/firefoxview/tests/browser/browser.toml
<...>
[task 2025-02-19T23:18:31.207Z] 23:18:31     INFO - GECKO(5365) | 1740007111206	Marionette	INFO	Marionette enabled
[task 2025-02-19T23:18:31.211Z] 23:18:31     INFO - GECKO(5365) | 1740007111210	Marionette	TRACE	Received observer notification final-ui-startup
[task 2025-02-19T23:18:31.346Z] 23:18:31     INFO - GECKO(5365) | console.error: "Warning: unrecognized command line flag" "-foreground"
[task 2025-02-19T23:18:31.397Z] 23:18:31     INFO - GECKO(5365) | 1740007111396	Marionette	INFO	Listening on port 2828
[task 2025-02-19T23:18:31.402Z] 23:18:31     INFO - GECKO(5365) | 1740007111401	Marionette	DEBUG	Marionette is listening
[task 2025-02-19T23:18:31.444Z] 23:18:31     INFO - GECKO(5365) | 1740007111443	Marionette	DEBUG	Accepted connection 0 from 127.0.0.1:47856
[task 2025-02-19T23:18:31.479Z] 23:18:31     INFO - GECKO(5365) | 1740007111478	Marionette	DEBUG	Closed connection 0
[task 2025-02-19T23:18:31.480Z] 23:18:31     INFO - GECKO(5365) | 1740007111479	Marionette	DEBUG	Accepted connection 1 from 127.0.0.1:47858
[task 2025-02-19T23:18:31.840Z] 23:18:31     INFO - GECKO(5365) | 1740007111839	Marionette	DEBUG	1 -> [0,1,"WebDriver:NewSession",{"strictFileInteractability":true}]
[task 2025-02-19T23:18:31.850Z] 23:18:31     INFO - GECKO(5365) | 1740007111850	Marionette	DEBUG	Waiting for initial application window
[task 2025-02-19T23:18:33.317Z] 23:18:33     INFO - GECKO(5365) | console.error: ({})
[task 2025-02-19T23:18:36.055Z] 23:18:36     INFO - GECKO(5365) | 1740007116054	Marionette	TRACE	Received observer notification browser-idle-startup-tasks-finished
[task 2025-02-19T23:18:36.078Z] 23:18:36     INFO - GECKO(5365) | 1740007116077	RemoteAgent	TRACE	[9] ProgressListener Start: expectNavigation=false resolveWhenStarted=false unloadTimeout=40000 waitForExplicitStart=false
[task 2025-02-19T23:18:36.079Z] 23:18:36     INFO - GECKO(5365) | 1740007116078	RemoteAgent	TRACE	[9] ProgressListener Setting unload timer (40000ms)
[task 2025-02-19T23:18:36.082Z] 23:18:36     INFO - GECKO(5365) | 1740007116081	RemoteAgent	TRACE	[9] Wait for initial navigation: isInitial=false, isLoadingDocument=false
[task 2025-02-19T23:18:36.083Z] 23:18:36     INFO - GECKO(5365) | 1740007116081	RemoteAgent	TRACE	[9] Document already finished loading: about:blank
[task 2025-02-19T23:18:36.083Z] 23:18:36     INFO - GECKO(5365) | 1740007116081	RemoteAgent	TRACE	[9] ProgressListener Stop: has error=false url=about:blank
[task 2025-02-19T23:18:36.117Z] 23:18:36     INFO - GECKO(5365) | 1740007116115	Marionette	DEBUG	1 <- [1,1,null,{"sessionId":"6e8d03cd-4b8f-4181-9762-a69b566fa624","capabilities":{"acceptInsecureCerts":false,"browserName":"firefox","browserVersion":"137.0a1","platformName":"linux","unhandledPromptBehavior":"dismiss and notify","userAgent":"Mozilla/5.0 (X11; Linux x86_64; rv:137.0) Gecko/20100101 Firefox/137.0","moz:buildID":"20250219215811","moz:headless":false,"moz:platformVersion":"4.4.0-1014-aws","moz:processID":5365,"moz:profile":"/tmp/tmpgd_yqnfi.mozrunner","moz:shutdownTimeout":300000,"pageLoadStrategy":"normal","timeouts":{"implicit":0,"pageLoad":300000,"script":30000},"setWindowRect":true,"strictFileInteractability":true,"moz:accessibilityChecks":false,"moz:webdriverClick":true,"moz:windowless":false,"proxy":{}}}]
[task 2025-02-19T23:18:36.133Z] 23:18:36     INFO - GECKO(5365) | 1740007116131	Marionette	DEBUG	1 -> [0,2,"Addon:Install",{"path":"/tmp/tmpu35_reue.zip","temporary":false}]
[task 2025-02-19T23:18:36.326Z] 23:18:36     INFO - GECKO(5365) | 1740007116325	Marionette	DEBUG	1 <- [1,2,null,{"value":"[e-mail]"}]
[task 2025-02-19T23:18:36.352Z] 23:18:36     INFO - GECKO(5365) | 1740007116351	Marionette	DEBUG	1 -> [0,3,"Addon:Install",{"path":"/tmp/tmp1pe_h8xv.zip","temporary":false}]
[task 2025-02-19T23:18:36.401Z] 23:18:36     INFO - GECKO(5365) | 1740007116399	Marionette	DEBUG	1 <- [1,3,null,{"value":"[e-mail]"}]
[task 2025-02-19T23:18:36.406Z] 23:18:36     INFO - GECKO(5365) | 1740007116405	Marionette	DEBUG	1 -> [0,4,"Marionette:GetContext",{}]
[task 2025-02-19T23:18:36.412Z] 23:18:36     INFO - GECKO(5365) | 1740007116405	Marionette	DEBUG	1 <- [1,4,null,{"value":"content"}]
[task 2025-02-19T23:18:36.415Z] 23:18:36     INFO - GECKO(5365) | 1740007116407	Marionette	DEBUG	1 -> [0,5,"Marionette:SetContext",{"value":"chrome"}]
[task 2025-02-19T23:18:36.417Z] 23:18:36     INFO - GECKO(5365) | 1740007116407	Marionette	DEBUG	1 <- [1,5,null,{"value":null}]
[task 2025-02-19T23:18:36.420Z] 23:18:36     INFO - GECKO(5365) | 1740007116409	Marionette	DEBUG	1 -> [0,6,"WebDriver:ExecuteScript",{"script":"/* This Source Code Form is subject to the terms of the Mozilla Public\n * License, v. 2.0. If a copy of the MPL was not distr ... s which flavor and url to load.\nlet ev = new CustomEvent(\"mochitest-load\", { detail: [flavor, url] });\nwin.dispatchEvent(ev);","args":[{"flavor":"browser-chrome","testUrl":"about:blank"}],"newSandbox":true,"sandbox":"default","line":2171,"filename":"tests/mochitest/runtests.py"}]
[task 2025-02-19T23:18:36.424Z] 23:18:36     INFO - GECKO(5365) | 1740007116423	RemoteAgent	TRACE	WebDriverProcessData actor created for PID 5365
[task 2025-02-19T23:18:36.428Z] 23:18:36     INFO - GECKO(5365) | 1740007116426	Marionette	TRACE	[1] MarionetteCommands actor created for window id 2
[task 2025-02-19T23:18:36.481Z] 23:18:36     INFO - GECKO(5365) | 1740007116480	RemoteAgent	TRACE	Received observer notification domwindowopened
[task 2025-02-19T23:18:36.495Z] 23:18:36     INFO - GECKO(5365) | 1740007116494	Marionette	DEBUG	1 <- [1,6,null,{"value":null}]
[task 2025-02-19T23:18:36.517Z] 23:18:36     INFO - GECKO(5365) | 1740007116512	Marionette	DEBUG	1 -> [0,7,"Marionette:SetContext",{"value":"content"}]
[task 2025-02-19T23:18:36.527Z] 23:18:36     INFO - GECKO(5365) | 1740007116512	Marionette	DEBUG	1 <- [1,7,null,{"value":null}]
[task 2025-02-19T23:18:36.554Z] 23:18:36     INFO - GECKO(5365) | 1740007116553	Marionette	DEBUG	1 -> [0,8,"WebDriver:DeleteSession",{}]
[task 2025-02-19T23:18:36.555Z] 23:18:36     INFO - GECKO(5365) | 1740007116554	Marionette	TRACE	[1] MarionetteCommands actor destroyed for window id 2
[task 2025-02-19T23:18:36.559Z] 23:18:36     INFO - GECKO(5365) | 1740007116558	Marionette	DEBUG	1 <- [1,8,null,{"value":null}]
[task 2025-02-19T23:18:36.594Z] 23:18:36     INFO - runtests.py | Waiting for browser...
[task 2025-02-19T23:18:36.601Z] 23:18:36     INFO - GECKO(5365) | 1740007116598	Marionette	DEBUG	Closed connection 1
[task 2025-02-19T23:18:36.851Z] 23:18:36     INFO - *** Start BrowserChrome Test Results ***
[task 2025-02-19T23:18:36.920Z] 23:18:36     INFO - checking window state
[task 2025-02-19T23:18:37.029Z] 23:18:37     INFO - TEST-START | browser/components/uitour/test/browser_UITour2.js
[task 2025-02-19T23:18:37.518Z] 23:18:37     INFO - GECKO(5365) | must wait for focus in content

Comment 1

[Intermittent Failures Robot]

Summary

14 failures in 4340 pushes (0.003 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 12
• try: 1
• mozilla-central: 1

Platform and build breakdown:

• linux1804-64-asan-qr: 14
  • opt: 14

Table

	swr
linux1804-64-asan-qr--/opt	14

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-02-17&endday=2025-02-23&tree=all

Comment 2

[Intermittent Failures Robot]

Summary

1 failures in 4564 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-central: 1

Platform and build breakdown:

• linux1804-64-asan-qr: 1
  • opt: 1

Table

	swr
linux1804-64-asan-qr--/opt	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-02-24&endday=2025-03-02&tree=all

Comment 3

[Intermittent Failures Robot]

Summary

2 failures in 4009 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 1
• mozilla-central: 1

Platform and build breakdown:

• linux1804-64-asan-qr: 2
  • opt: 2

Table

	swr
linux1804-64-asan-qr--/opt	2

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-03-03&endday=2025-03-09&tree=all

Comment 4

[Intermittent Failures Robot]

Summary

1 failures in 4826 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• try: 1

Platform and build breakdown:

• linux1804-64-asan-qr: 1
  • opt: 1

Table

	swr
linux1804-64-asan-qr--/opt	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-03-10&endday=2025-03-16&tree=all

Comment 5

[Intermittent Failures Robot]

Summary

2 failures in 5035 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 1
• mozilla-beta: 1

Platform and build breakdown:

• linux1804-64-asan-qr: 2
  • opt: 2

Table

	swr
linux1804-64-asan-qr--/opt	2

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-03-17&endday=2025-03-23&tree=all

Comment 6

[Intermittent Failures Robot]

Repository breakdown:

• mozilla-central: 1

Table

	swr
linux1804-64-asan-qr--/opt	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-03-24&endday=2025-03-30&tree=all

Comment 7

[Intermittent Failures Robot]

2 failures were associated with this bug in the last 7 days.

Repository breakdown:

• try: 1
• autoland: 1

Table

	no_variant
linux1804-64-asan-qr--/opt	2

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-03-31&endday=2025-04-06&tree=all

Comment 8

[Intermittent Failures Robot]

8 failures were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 7
• try: 1

Table

	no_variant	swr
linux1804-64-asan-qr--/opt	7	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-04-07&endday=2025-04-13&tree=all

Comment 9

[Intermittent Failures Robot]

15 failures were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 13
• try: 1
• mozilla-central: 1

Table

	no_variant	swr
linux1804-64-asan-qr--/opt	12	3

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-04-14&endday=2025-04-20&tree=all

Comment 10

[Intermittent Failures Robot]

13 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-central: 4
• try: 2
• autoland: 7

Table

	no_variant	swr
linux1804-64-asan-qr--/opt	11	2

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-04-21&endday=2025-04-27&tree=all

Comment 11

[Intermittent Failures Robot]

9 failures were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 5
• try: 1
• mozilla-central: 2
• mozilla-beta: 1

Table

	no_variant	swr
linux1804-64-asan-qr--/opt	8	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-04-28&endday=2025-05-04&tree=all

Comment 12

[Intermittent Failures Robot]

20 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-central: 2
• try: 3
• autoland: 10
• mozilla-beta: 5

Table

	no_variant	swr
linux1804-x86_64/asan	19	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-05-05&endday=2025-05-11&tree=all

Comment 13

[Intermittent Failures Robot]

10 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-central: 1
• try: 2
• autoland: 5
• mozilla-beta: 2

Table

	no_variant	swr
linux1804-x86_64/asan	9	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-05-12&endday=2025-05-18&tree=all

Comment 14

[Intermittent Failures Robot]

15 failures were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 9
• mozilla-central: 4
• mozilla-release: 1
• try: 1

Table

	no_variant	swr
linux1804-x86_64/asan	13	2

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-05-19&endday=2025-05-25&tree=all

Comment 15

[Intermittent Failures Robot]

12 failures were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 6
• try: 2
• mozilla-beta: 3
• mozilla-central: 1

Table

	no_variant
linux1804-x86_64/asan	12

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-05-26&endday=2025-06-01&tree=all

Comment 16

[Intermittent Failures Robot]

19 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-beta: 5
• autoland: 7
• try: 1
• mozilla-central: 4
• mozilla-release: 2

Table

	no_variant	swr
linux1804-x86_64/asan	17	2

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-06-02&endday=2025-06-08&tree=all

Comment 17

[Intermittent Failures Robot]

15 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-beta: 4
• autoland: 9
• mozilla-central: 2

Table

	no_variant
linux1804-x86_64/asan	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-06-09&endday=2025-06-15&tree=all

Comment 18

[Intermittent Failures Robot]

5 failures were associated with this bug in the last 7 days.

Repository breakdown:

• try: 1
• autoland: 3
• mozilla-central: 1

Table

	no_variant
linux1804-x86_64/asan	4
linux2404-x86_64/asan	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-06-16&endday=2025-06-22&tree=all

Comment 19

[Intermittent Failures Robot]

7 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr140: 1
• autoland: 5
• mozilla-central: 1

Table

	no_variant
linux1804-x86_64/asan	1
linux2404-x86_64/asan	6

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-06-23&endday=2025-06-29&tree=all

Comment 20

[Intermittent Failures Robot]

10 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-release: 2
• mozilla-esr140: 1
• autoland: 5
• mozilla-beta: 1
• try: 1

Table

	no_variant
linux1804-x86_64/asan	3
linux2404-x86_64/asan	7

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-06-30&endday=2025-07-06&tree=all

Comment 21

[Intermittent Failures Robot]

10 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr140: 2
• mozilla-central: 2
• autoland: 5
• mozilla-beta: 1

Table

	no_variant	nofis	swr
linux1804-x86_64/asan	2
linux2404-x86_64/asan	6	1	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-07-14&endday=2025-07-20&tree=all

Comment 22

[Intermittent Failures Robot]

15 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr140: 4
• mozilla-central: 3
• autoland: 4
• mozilla-beta: 4

Table

	no_variant	swr
linux1804-x86_64/asan	4
linux2404-x86_64/asan	10	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-07-21&endday=2025-07-27&tree=all

Comment 23

[Intermittent Failures Robot]

8 failures were associated with this bug in the last 7 days.

Repository breakdown:

• try: 2
• mozilla-central: 2
• autoland: 1
• mozilla-beta: 3

Table

	no_variant
linux2404-x86_64/asan	8

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1949307&startday=2025-07-28&endday=2025-08-03&tree=all