swift

64a57e3a - [stdlib] Switch to using unchecked buffer subscript in low-level Unicode helpers

[stdlib] Switch to using unchecked buffer subscript in low-level Unicode helpers We expect indices to be already validated by the time these are called, and UBP’s debug-mode checks are compiled into opaque parts of the stdlib. (The big exception is that Swift <5.7 used to not do proper index validation and allowed out-of-bounds accesses. We emulate this behavior for code that was compiled with such a release, and it turns out that these UnsafeBufferPointer checks are interfering with the intended (undefined) behavior.) rdar://93707276