Bug 217241 – Web Inspector: Uncaught Exception: TypeError: undefined is not an object (evaluating 'breakpoint.disabled = true')

• Component: Web Inspector
• Status: RESOLVED FIXED

[Devin Rousso]

# STEPS TO REPRODUCE
1. inspect any page with JS event listeners
2. uncheck the "Enabled" checkbox for any event listener on any node

Uncaught Exceptions:
-----------------------
 - TypeError: undefined is not an object (evaluating 'breakpoint.disabled = true') (at DOMManager.js:705:19)
    removeBreakpointForEventListener @ DOMManager.js:705:19
    hasEventListenerBreakpoint @ EventListenerSectionGroup.js:167:59
    ? @ EventListenerSectionGroup.js:62:25

[Devin Rousso]

Created attachment 410351 [details]
Patch

[Kate Cheney]

Comment on attachment 410351 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=410351&action=review

> Source/WebInspectorUI/UserInterface/Controllers/DOMManager.js:-701
> -                target.DOMAgent.removeBreakpointForEventListener(eventListener.eventListenerId);

Why remove this call?

[Devin Rousso]

Comment on attachment 410351 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=410351&action=review

>> Source/WebInspectorUI/UserInterface/Controllers/DOMManager.js:-701
>> -                target.DOMAgent.removeBreakpointForEventListener(eventListener.eventListenerId);
> 
> Why remove this call?

this is done later inside `_handleEventBreakpointDisabledStateChanged` (which is an event listener callback for `WI.Breakpoint.Event.DisabledStateDidChange`, which is dispatched by `WI.Breakpoint.prototype.set disabled`)

[Kate Cheney]

(In reply to Devin Rousso from comment #3)
> Comment on attachment 410351 [details]
> Patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=410351&action=review
> 
> >> Source/WebInspectorUI/UserInterface/Controllers/DOMManager.js:-701
> >> -                target.DOMAgent.removeBreakpointForEventListener(eventListener.eventListenerId);
> > 
> > Why remove this call?
> 
> this is done later inside `_handleEventBreakpointDisabledStateChanged`
> (which is an event listener callback for
> `WI.Breakpoint.Event.DisabledStateDidChange`, which is dispatched by
> `WI.Breakpoint.prototype.set disabled`)

Nice, thanks for explaining!

[Blaze Burg]

Comment on attachment 410351 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=410351&action=review

r=e

>>>> Source/WebInspectorUI/UserInterface/Controllers/DOMManager.js:-701
>>>> -                target.DOMAgent.removeBreakpointForEventListener(eventListener.eventListenerId);
>>> 
>>> Why remove this call?
>> 
>> this is done later inside `_handleEventBreakpointDisabledStateChanged` (which is an event listener callback for `WI.Breakpoint.Event.DisabledStateDidChange`, which is dispatched by `WI.Breakpoint.prototype.set disabled`)
> 
> Nice, thanks for explaining!

Would have been good to put this in the changelog :-)

[Blaze Burg]

r=me *

[EWS]

Committed r267998: <https://trac.webkit.org/changeset/267998>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 410351 [details].

[Radar WebKit Bug Importer]

<rdar://problem/69967550>