%TypedArray%#slice shouldn't care about dsource buffer detachment if there's nothing to copy
Created attachment 415247 [details] Patch
Comment on attachment 415247 [details] Patch r=me
Created attachment 415248 [details] Patch for landing
Committed r270371: <https://trac.webkit.org/changeset/270371> All reviewed patches have been landed. Closing bug and clearing flags on attachment 415248 [details].
<rdar://problem/71912137>