[Webkit-unassigned] [Bug 187287] New: Add a release assert to diagnose infinite recursions in removeAllEventListeners()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=187287

            Bug ID: 187287
           Summary: Add a release assert to diagnose infinite recursions
                    in removeAllEventListeners()
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Event Handling
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: rniwa at webkit.org

Somehow we're encountering infinite recursions inside removeAllEventListeners():
e.g.

Thread 0 Crashed ↩:: Dispatch queue: com.apple.main-thread
0   com.apple.WebCore                   0x00007fff53718587 WebCore::EventTarget::removeAllEventListeners() + 7
1   com.apple.WebCore                   0x00007fff5371858a WebCore::EventTarget::removeAllEventListeners() + 10
2   com.apple.WebCore                   0x00007fff5371858a WebCore::EventTarget::removeAllEventListeners() + 10
3   com.apple.WebCore                   0x00007fff5371858a WebCore::EventTarget::removeAllEventListeners() + 10
4   com.apple.WebCore                   0x00007fff5371858a WebCore::EventTarget::removeAllEventListeners() + 10
...
511 com.apple.WebCore                   0x00007fff5371858a WebCore::EventTarget::removeAllEventListeners() + 10
...

Add a release assertion to reveal the earlier stack trace in order to diagnose this crash.

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