Silent crash without triggering recursion warning

[anonymous]

​https://www.autoitscript.com/forum/topic/209971-haskell-like-recursive-map/?do=findComment&comment=1515960

AutoIt triggers recursion warning and exits when you reach a recursion depth of 1898, but in some instances it would fail to trigger the warning and instead simply crash silently.

I'm not certain whether it is a bug with AutoIt itself or if it is simply the Operating System terminating it defensively, it's worth investigating.

[J-Paul Mesnage]

Hi in fact the pointed post script does not produce any error on my system
could you post an updated one?

Thanks

[anonymous]

Replying to Jpm:

Hi in fact the pointed post script does not produce any error on my system
could you post an updated one?

Thanks

That's the problem, it did not produce an error when it should have. The script just crashes without producing a result. Did your system produce a result MsgBox, or did it just exit silently?

[anonymous]

Replying to anonymous:

Replying to Jpm:

Hi in fact the pointed post script does not produce any error on my system
could you post an updated one?

Thanks

That's the problem, it did not produce an error when it should have. The script just crashes without producing a result. Did your system produce a result MsgBox, or did it just exit silently?

That is, if you change 1569 to a larger number.

[anonymous]

For your convenience, here's a tweaked version that crashes silently:

local $a = enumerate(1570)
local $b = packLeft($a)
local $c = packRight($a)
msgbox(0,'foldl',foldl(addOddLeft,0,$b))
msgbox(0,'foldr',foldr(addOddRight,$c,0))


func addOddLeft($left, $right)
     return $left + ($right*2 - 1)
endfunc

func addOddRight($left, $right)
     return ($left*2 - 1) + $right
endfunc

func foldl($f, $x0, $xs)
     return IsArray($xs[0]) ? $f( foldl($f,$x0,$xs[0]) , $xs[1] ) : $f($x0,$xs[0])
endfunc

func foldr($f, $xs, $x0)
     return IsArray($xs[0]) ? $f( $xs[1] , foldr($f,$xs[0],$x0) ) : $f($xs[0],$x0)
endfunc

func foldl_FromFlatArray($f, $ini, $arr)
     return foldl($f,$ini,packLeft($arr))
endfunc

func foldr_FromFlatArray($f, $arr, $ini)
     return foldr($f,packRight($arr),$ini)
endfunc

func packLeft($arr)
     return __packL($arr,UBound($arr)-1)
endfunc

func packRight($arr)
     return __packR($arr,0)
endfunc

func unpack($arr)
     return IsArray($arr[0]) ? $arr[1] & ' , ' & unpack($arr[0]) : $arr[0]
endfunc

; === Boring Internal Implementation ===

func __packL($arr, $index)
     if $index>0 Then
        local $a = [ __packL($arr,$index-1) , $arr[$index]]
     else
        local $a = [ $arr[0] ]
     endif
     return $a
endfunc

func __packR($arr, $index)
     if $index<UBound($arr)-1 Then
        local $a = [ __packR($arr,$index+1) , $arr[$index] ]
     else
        local $a = [ $arr[UBound($arr)-1] ]
     endif
     return $a
endfunc

func enumerate($n)
     local $arr[$n]
     for $i=0 to $n-1
         $arr[$i] = $i+1
     next
     return $arr
endfunc

[J-Paul Mesnage]

Hi, your script produce 2 msgbox and stop gracefully
soI don't see any pb

[J-Paul Mesnage]

No answer to I close the ticket