$1857aec1 destructuring-let-compound-assign.js:5:1
  Registers: 9
  Blocks:    1
  Constants:
    [0] = Undefined

block0:
  [   0] GetGlobal dst:reg6, `f`
  [  10] NewObject dst:reg7
  [  20] NewObject dst:reg8
  [  30] Call dst:reg5, callee:reg6, this_value:Undefined, f, arguments:[reg7, reg8]
  [  58] End value:reg5


f$ffd4f57c destructuring-let-compound-assign.js:2:5
  Registers: 8
  Blocks:    1
  Locals:    a~0
  Constants:
    [0] = Int32(16)
    [1] = Undefined

block0:
  [   0] ThrowIfNullish src:arg0
  [   8] GetById dst:reg5, base:arg0, `patchFlag`
  [  20] Mov3 dst1:a~0, src1:reg5, dst2:reg5, src2:a~0, dst3:reg6, src3:arg1
  [  40] GetById dst:reg7, base:reg6, `patchFlag` (e.patchFlag)
  [  58] BitwiseAnd dst:reg6, lhs:Int32(16), rhs:reg7
  [  68] BitwiseOr dst:reg7, lhs:reg5, rhs:reg6
  [  78] Mov dst:a~0, src:reg7
  [  88] End value:Undefined