[Webkit-unassigned] [Bug 141122] editing/selection/programmatic-selection-on-mac-is-directionless.html is flaky (IPC message delivery order is unreliable)

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu Aug 1 09:22:36 PDT 2019


--- Comment #9 from Chris Dumez <cdumez at apple.com> ---
The test uses EventSender, which puts our IPC::Connection in a special mode where async IPC messages get sent synchronously (not just the EventSender-related ones but ALL of them). As a result of this behavior, you can imagine:
1. Send an async IPC (a)
2. EventSender does a click which puts our IPC::Connection in SyncModeForTesting
3. Send an async IPC (b) -> becomes sync and may get received before IPC (a)

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