   C._Element == Slice_.Iterator.Element,
   C.Index == Slice_.Index
 >(self_: inout C, bounds: Range<C.Index>, slice: Slice_) {
-  fatalError("FIXME: swift-3-indexing-model")
-  /*
-  C._failEarlyRangeCheck(bounds, self_.startIndex..<self_.endIndex)
+  
+  self_._failEarlyRangeCheck(bounds, bounds: self_.startIndex..<self_.endIndex)
   
   // FIXME(performance): can we use
   // _withUnsafeMutableBufferPointerIfSupported?  Would that create inout

    newElementIndex != newElementsEndIndex {

    self_[selfElementIndex] = slice[newElementIndex]
    selfElementIndex._successorInPlace()
    newElementIndex._successorInPlace()
  }

  _precondition(

  }
}

internal func _writeBackMutableSlice<
  C : MutableCollection,
  Slice_ : Collection
