1. Hit a breakpoint with level-1 inspector open 2. Open level-2 inspector. No icons will be loaded 3. Continue, and the icons (usually) re-appear.
This is about the WebSQL callbacks being blocked while we are paused.
I cannot repro this anymore with multi-process inspector. The cause seems related to other deferred callOnMainThread callbacks we were running into.
<rdar://problem/19168655>