Closed Bug 1919145 Opened 7 months ago Closed 7 months ago

MOZ_CRASH(MouseEvent target must be an element) at layout/base/PresShell.cpp:9012 when drag tab out of window

Categories

(Core :: DOM: UI Events & Focus Handling, defect)

Product:
Core
Component:
DOM: UI Events & Focus Handling
Type:
defect

Tracking

()

Status:
RESOLVED DUPLICATE of bug 1916141

People

(Reporter: gstoll, Unassigned)

References

(Regression)

Details

(Keywords: regression)

STR:

  • Open a debug build of Firefox
  • Open two tabs in the same window
  • Drag one tab and drop it outside of any Firefox window (in order to make a new window)

mozregression says this has been happening since 2024-08-01, so I'm assuming this has been happening since this MOZ_CRASH was added in bug 1905267.

:masayuki, since you are the author of the regressor, bug 1905267, could you take a look? Also, could you set the severity field?

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Flags: needinfo?(masayuki)

I landed the patch for bug 1916141 yesterday and it should fix this bug too. I cannot reproduce with the STR with the latest debug build on Windows. Do you still reproduce the crash in the newer build?

Flags: needinfo?(masayuki) → needinfo?(gstoll)

Ah, yup, this seems to have fixed it. Thanks!

Status: NEW → RESOLVED
Closed: 7 months ago
Duplicate of bug: 1916141
Flags: needinfo?(gstoll)
Resolution: --- → DUPLICATE

No, thank you for the report! I'll try to understand what's going on in the case. (The fix does not include a test.)

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