$d85408b3 var-shadow-in-default-param.js:7:1
  Registers: 8
  Blocks:    1
  Constants:
    [0] = String("outer")
    [1] = Undefined

block0:
  [   0] SetGlobal `shadow`, src:String("outer")
  [  18] GetGlobal dst:reg6, `shadow_in_default`
  [  30] Call dst:reg5, callee:reg6, this_value:Undefined, shadow_in_default
  [  50] GetGlobal dst:reg7, `no_conflict`
  [  68] Call dst:reg6, callee:reg7, this_value:Undefined, no_conflict
  [  88] End value:reg6


shadow_in_default$adf74487 var-shadow-in-default-param.js:8:32
  Registers: 7
  Blocks:    3
  Constants:
    [0] = Undefined
    [1] = String("inner")

block0:
  [   0] JumpUndefined condition:arg0, true_target:block1, false_target:block2

block1:
  [  10] GetInitializedBinding dst:reg5, `shadow`
  [  28] Mov dst:arg0, src:reg5

block2:
  [  38] CreateVariableEnvironment capacity:1
  [  40] GetLexicalEnvironment dst:reg5
  [  48] Mov dst:reg6, src:Undefined
  [  58] CreateVariable `shadow`, is_immutable:false, is_global:false, is_strict:false
  [  68] InitializeVariableBinding `shadow`, src:reg6
  [  80] SetLexicalBinding `shadow`, src:String("inner")
  [  98] Return value:arg0


no_conflict$f0c5f291 var-shadow-in-default-param.js:17:5
  Registers: 6
  Blocks:    3
  Locals:    y~0
  Constants:
    [0] = Int32(1)
    [1] = Undefined
    [2] = Int32(2)

block0:
  [   0] JumpUndefined condition:arg0, true_target:block1, false_target:block2

block1:
  [  10] Mov dst:arg0, src:Int32(1)

block2:
  [  20] Mov3 dst1:reg5, src1:Undefined, dst2:y~0, src2:reg5, dst3:y~0, src3:Int32(2)
  [  40] Return value:y~0