tree 101fcc04776a33c42ced660d4b4d50232b00bc32
parent 7d815df5a5eb5a0a67d72260d5639681d50d7f66
author rniwa@webkit.org <rniwa@webkit.org@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1570947979 +0000
committer rniwa@webkit.org <rniwa@webkit.org@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1570947979 +0000

[iOS] Crash in WebCore::DOMWindow::incrementScrollEventListenersCount
https://bugs.webkit.org/show_bug.cgi?id=202878

Reviewed by Alex Christensen.

Source/WebCore:

Added the missing null check in tryAddEventListener and tryRemoveEventListener for scroll event.

Test: fast/events/scroll-event-on-document-without-window.html

* dom/Node.cpp:
(WebCore::tryAddEventListener):
(WebCore::tryRemoveEventListener):

LayoutTests:

Added a regression test for the crash.

* fast/events/scroll-event-on-document-without-window-expected.txt: Added.
* fast/events/scroll-event-on-document-without-window.html: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@251057 268f45cc-cd09-0410-ab3c-d52691b4dbfc