Currently, NSItemProvider-related UIPasteboard APIs only exist in the iOS 11 SDK. I tried to guard iOS 10 codepaths in PlatformPasteboardIOS.mm with __IPHONE_OS_VERSION_MAX_ALLOWED < 110000 and assume that item provider APIs would be available otherwise, but this is not the case. Revert to special casing code that uses item provider APIs with __IPHONE_OS_VERSION_MIN_REQUIRED >= 110000, instead of the inverse.
Created attachment 318409 [details] Patch
Comment on attachment 318409 [details] Patch Thanks Tim!
Comment on attachment 318409 [details] Patch Clearing flags on attachment: 318409 Committed r220883: <http://trac.webkit.org/changeset/220883>
All reviewed patches have been landed. Closing bug.
<rdar://problem/33951376>