$9431c529 destructuring-assignment-in-logical-and.js:5:1
  Registers: 7
  Blocks:    1
  Constants:
    [0] = Undefined
    [1] = Null
    [2] = Int32(0)

block0:
  [   0] GetGlobal dst:reg6, `f`
  [  18] Call dst:reg5, callee:reg6, this_value:Undefined, f, arguments:[Null, Int32(0)]
  [  40] End value:reg5


f$bd59b03f destructuring-assignment-in-logical-and.js:2:5
  Registers: 12
  Blocks:    10
  Locals:    a~0, b~1
  Constants:
    [0] = Undefined
    [1] = Bool(false)

block0:
  [   0] Mov3 dst1:a~0, src1:Undefined, dst2:b~1, src2:Undefined, dst3:reg5, src3:arg0
  [  20] JumpFalse condition:arg0, target:block2

block1:
  [  30] Mov2 dst1:reg7, src1:arg0, dst2:reg8, src2:arg1
  [  48] Call dst:reg6, callee:reg7, this_value:Undefined, t, arguments:[reg8]
  [  70] Mov dst:reg7, src:Bool(false)
  [  80] GetIterator dst_iterator_object:reg8, dst_iterator_next:reg9, dst_iterator_done:reg10, iterable:reg6
  [  98] IteratorNextUnpack dst_value:reg11, dst_done:reg7, iterator_object:reg8, iterator_next:reg9, iterator_done:reg10
  [  b0] JumpIf condition:reg7, true_target:block3, false_target:block4

block2:
  [  c0] End value:Undefined

block3:
  [  c8] Mov dst:reg11, src:Undefined
  [  d8] Jump target:block4

block4:
  [  e0] Mov dst:a~0, src:reg11
  [  f0] JumpFalse condition:reg7, target:block6

block5:
  [ 100] Mov dst:reg11, src:Undefined
  [ 110] Jump target:block7

block6:
  [ 118] IteratorNextUnpack dst_value:reg11, dst_done:reg7, iterator_object:reg8, iterator_next:reg9, iterator_done:reg10
  [ 130] JumpTrue condition:reg7, target:block5

block7:
  [ 140] Mov dst:b~1, src:reg11
  [ 150] JumpFalse condition:reg7, target:block9

block8:
  [ 160] Mov dst:reg5, src:reg6
  [ 170] Jump target:block2

block9:
  [ 178] IteratorClose iterator_object:reg8, iterator_next:reg9, iterator_done:reg10, completion_value:Undefined
  [ 190] Jump target:block8