Bug 129315 – Web Inspector: Crash in loadResourceSynchronously while loading a source map

• Component: Web Inspector
• Status: RESOLVED FIXED

[[e-mail]]

Created attachment 225156 [details]
Crash report from Safari

The web inspector becomes very unstable when open while a heavy DOM operation is occurring on page load. The loading of the page and the adding of DOM nodes becomes many times more sluggish while the inspector is open. Additionally, attempting to close the web inspector during this period of instability (usually because it's going slow and I want it to get on with it already) causes the web inspector process to crash.

[Radar WebKit Bug Importer]

<rdar://problem/16160938>

[Timothy Hatcher]

Crash in loadResourceSynchronously, which is only used by source maps.

[Timothy Hatcher]

It looks like the page uses source maps. Is there any more details you can share about that to help us?

[[e-mail]]

The project is a single page web app that uses SCSS files to generate CSS and CoffeeScript to generate the JS. Both the CoffeScript and SCSS are being compiled using a Grunt task. I'm not actively using the source maps at all, actually, but I guess the Grunt task could be generating them without me knowing.

The JS/CoffeeScript is also dependent on Backbone to do all of its rendering. We're rendering out a ton of DOM nodes (it's a calendaring app) and that's the heavy operation at load. This project is basically a rewrite of http://www.floatschedule.com calendar view to be all front-end.

Let me know if getting access to the actual page would help, I can set you up with credentials.

Joe

[Timothy Hatcher]

Yes, access to the page would help us. You can email details to [e-mail].

[Timothy Hatcher]

We plan to switch to async source map loading, which would likely remove this crash site.

[Timothy Hatcher]

We removed the last uses of loadResourceSynchronously. Should not crash anymore.