For loop not working as expected

[BrewManNH]

Here's some code I came across that isn't working as it should, at least isn't working as I think it should work.

Global $Array[5] = ["AA", "BB", "CC", "DD", "EE"]
For $I = -1 To $Array
    ConsoleWrite('@@ Debug(' & @ScriptLineNumber & ') : $I = ' & $I & @crlf & '>Error code: ' & @error & @crlf) ;### Debug Console
Next
Global $Array[5][2] = [["AA", "1"], ["BB", 2], ["CC", 3], ["DD", 4],["EE", 5]]
For $I = 10 To $Array
    ConsoleWrite('@@ Debug(' & @ScriptLineNumber & ') : $I = ' & $I & @crlf & '>Error code: ' & @error & @crlf) ;### Debug Console
Next

The output from the code above, when run from SciTE, is this.

@@ Debug(7) : $I = -1
Error code: 0
@@ Debug(7) : $I = BB
Error code: 0
@@ Debug(7) : $I = CC
Error code: 0
@@ Debug(7) : $I = DD
Error code: 0
@@ Debug(7) : $I = EE
Error code: 0
@@ Debug(11) : $I = 10
Error code: 0
@@ Debug(11) : $I = 10
Error code: 0
@@ Debug(11) : $I = 10
Error code: 0
@@ Debug(11) : $I = 10
Error code: 0
@@ Debug(11) : $I = 10

The first value of $I is correct, it starts at whatever the For loop starts at, but then the For/Next loop starts acting like a For/In/Next loop. On a 2D array, the second section of code, it just loops for however many elements there are in the array, and the initial value of $I doesn't change.

I would have expected this to either error out, because it's referencing an array instead of a number, or run once because there's no end number to reach.

I have tested this code on 3.3.8.1, 3.3.6.1, and 3.3.9.5 and they all run the same way.

I don't think this should be working the way it is and appears to be a bug.

[trancexx]

Yes, it's a bug. The code isn't performing necessary type conversion. The fix is trivial.
Thanks for reporting.

[J-Paul Mesnage]

I think the script must error as $array as no valid type conversion

[J-Paul Mesnage]

For invalid parameter (cannot be incremented) will produce a Fatal error
Even similar expression such $var = $array + 1 will produce a Fatal error.

Fix sent to Jon