Fix jQuery #14535: Always setDocument() after iframe unload

[gibson042]

   raw     gz Sizes
 57353  17341 dist/sizzle.js
 18335   7060 dist/sizzle.min.js

   raw     gz Compared to master @ 3c3c5f20f8289f4e943d11d93f5541af1b072667
  +192    +51 dist/sizzle.js
   +63    +25 dist/sizzle.min.js

😢

[dmethvin]

Doesn't this also disable bfcache? That would be a horror to inflict on everyone for the sins of one.

[gibson042]

I believe it will, but keep in mind that the blast radius is reduced by this only applying to child windows.

[timmywil]

👍

[dmethvin]

Oh true. That's probably less of an impact. There should be some way to limit this further to IE but I can't think of a safe one that won't similarly break in the future.

[gibson042]

@timmywil @dmethvin Can you make sure this hits Sizzle and jQuery respectively before the release? I don't think I'll have the time for it today.