Use UnsafeRawPointer in withArrayOfCStrings.

To obey the memory model.

Author: atrick

stdlib/private/SwiftPrivate/SwiftPrivate.swift

@@ -81,7 +81,8 @@ public func withArrayOfCStrings<R>(
 
   return argsBuffer.withUnsafeMutableBufferPointer {
     (argsBuffer) in
-    let ptr = UnsafeMutablePointer<CChar>(argsBuffer.baseAddress!)
+    let ptr = UnsafeMutableRawPointer(argsBuffer.baseAddress!).bindMemory(
+      to: CChar.self, capacity: argsBuffer.count)
     var cStrings: [UnsafeMutablePointer<CChar>?] = argsOffsets.map { ptr + $0 }
     cStrings[cStrings.count - 1] = nil
     return body(cStrings)