Allow Builtin.Take -> ~Escapable

Author: atrick

include/swift/AST/Builtins.def

@@ -240,6 +240,7 @@ BUILTIN_SIL_OPERATION(LoadRaw, "loadRaw", Special)
 BUILTIN_SIL_OPERATION(LoadInvariant, "loadInvariant", Special)
 
 /// Take has type (Builtin.RawPointer) -> T
+/// where T: ~Copyable & ~Escapable
 BUILTIN_SIL_OPERATION(Take, "take", Special)
 
 /// Destroy has type (T.Type, Builtin.RawPointer) -> ()

lib/AST/Builtins.cpp

@@ -931,8 +931,7 @@ static ValueDecl *getLoadOperation(ASTContext &ctx, Identifier id) {
 
 static ValueDecl *getTakeOperation(ASTContext &ctx, Identifier id) {
   return getBuiltinFunction(ctx, id, _thin,
-                            _generics(_unrestricted,
-                                      _conformsTo(_typeparam(0), _escapable)),
+                            _generics(_unrestricted),
                             _parameters(_rawPointer),
                             _typeparam(0));
 }