For/Next with Step -x issue when using variable=0 for the TO value

[chunkypixel]

When using a For/Next Loop with the Step -x option (stepping backwards) if you set the To value using a variable and NOT hard-coded then you get a lockup if the variable = 0.

Example

 dim indexPosition = var0
 dim index = var1

 indexPosition = 0  ;FAIL
 ;indexPosition = 1  ;OK
 ;indexPosition = 2  ;OK
 for index = 2 to indexPosition step -1
 next

 ;WORKS
 ;for index = 2 to 0 step -1
 ;next

MainLoop
 BACKGRND = rand
 goto MainLoop

I assume as the indexPosition value is not known at compile time this may be a limitation of the feature?