Moving this to 'other boards' - IskraJS isn't an official board - they're just using the Open Source Espruino firmware.
I've tried to run your code even on a 1v92 version of Espruino and it works (without the Exception) - perhaps you could contact Amperka to see if they can help you out.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Moving this to 'other boards' - IskraJS isn't an official board - they're just using the Open Source Espruino firmware.
I've tried to run your code even on a 1v92 version of Espruino and it works (without the Exception) - perhaps you could contact Amperka to see if they can help you out.