$12cfcca1 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`
  [  10] Call dst:reg5, callee:reg6, this_value:Undefined, f, arguments:[Null, Int32(0)]
  [  38] End value:reg5


f$e8e4cc1a destructuring-assignment-in-logical-and.js:2:5
  Registers: 14
  Blocks:    21
  Locals:    a~0, b~1
  Constants:
    [0] = Undefined
    [1] = Bool(false)
    [2] = Int32(1)
    [3] = Int32(2)

block0:
  [   0] GetLexicalEnvironment dst:reg4
  [   8] Mov3 dst1:a~0, src1:Undefined, dst2:b~1, src2:Undefined, dst3:reg5, src3:arg0
  [  28] JumpFalse condition:arg0, target:block2

block1:
  [  38] Mov2 dst1:reg7, src1:arg0, dst2:reg8, src2:arg1
  [  50] Call dst:reg6, callee:reg7, this_value:Undefined, t, arguments:[reg8]
  [  78] Mov dst:reg7, src:Bool(false)
  [  88] GetIterator dst_iterator_object:reg8, dst_iterator_next:reg9, dst_iterator_done:reg10, iterable:reg6
  [  a0] Jump target:block5

block2:
  [  a8] End value:Undefined

block3:
  [  b0] Catch dst:reg12
  [  b8] SetLexicalEnvironment environment:reg4
  [  c0] Mov dst:reg11, src:Int32(1)
  [  d0] JumpIf condition:reg10, true_target:block16, false_target:block15

block4:
  [  e0] Mov dst:reg5, src:reg6
  [  f0] Jump target:block2

block5:
  [  f8] Jump target:block7

block6:
  [ 100] Mov dst:reg13, src:Undefined
  [ 110] Jump target:block8

block7:
  [ 118] IteratorNextUnpack dst_value:reg13, dst_done:reg7, iterator_object:reg8, iterator_next:reg9, iterator_done:reg10
  [ 130] JumpTrue condition:reg7, target:block6

block8:
  [ 140] Mov dst:a~0, src:reg13
  [ 150] JumpFalse condition:reg7, target:block10

block9:
  [ 160] Mov dst:reg13, src:Undefined
  [ 170] Jump target:block11

block10:
  [ 178] IteratorNextUnpack dst_value:reg13, dst_done:reg7, iterator_object:reg8, iterator_next:reg9, iterator_done:reg10
  [ 190] JumpTrue condition:reg7, target:block9

block11:
  [ 1a0] Mov dst:b~1, src:reg13

block12:
  [ 1b0] JumpFalse condition:reg10, target:block14

block13:
  [ 1c0] Jump target:block4

block14:
  [ 1c8] IteratorClose iterator_object:reg8, iterator_next:reg9, iterator_done:reg10, completion_value:Undefined
  [ 1e0] Jump target:block13

block15:
  [ 1e8] JumpStrictlyEquals lhs:reg11, rhs:Int32(1), true_target:block17, false_target:block18

block16:
  [ 200] JumpStrictlyEquals lhs:reg11, rhs:Int32(2), true_target:block19, false_target:block20

block17:
  [ 218] IteratorClose iterator_object:reg8, iterator_next:reg9, iterator_done:reg10, completion_value:reg12
  [ 230] Throw src:reg12

block18:
  [ 238] IteratorClose iterator_object:reg8, iterator_next:reg9, iterator_done:reg10, completion_value:Undefined
  [ 250] Jump target:block16

block19:
  [ 258] Return value:reg12

block20:
  [ 260] Throw src:reg12

Exception handlers:
  [  f8 ..  118] => handler block3
  [ 140 ..  178] => handler block3
  [ 1a0 ..  1b0] => handler block3