The bind group generation assumes bindGroupEntry.index == index in the argument buffer, but external textures take four slots in the argument buffer. So an external texture anywhere but the very end will be problematic
<rdar://problem/116403353>
Pull request: https://github.com/WebKit/WebKit/pull/18575
Committed 268860@main (b43510eeb362): <https://commits.webkit.org/268860@main> Reviewed commits have been landed. Closing PR #18575 and removing active labels.