Create a <select multiple> with substantial padding and many <options> inside of it. Build a debug build of WebKit, and click around a lot in the <select multiple>. Crash.
Fixed in this commit by Blink: https://src.chromium.org/viewvc/blink?view=revision&revision=186781
NOTE - we already have tested imported for the following blink patch but patch itself is not applied, so we are not crashing but this assertion failure was fixed by this commit itself. Is it good to apply patch or we can just ignore it and close this bug since we are not hitting this assertion anymore?