NewBee - unknown "possible" memory leak?

Are you running the latest 1v66?

Yes, Last week I just obtained 1v66 and had to reload the firmware.

It's possible that a little noise gets on pin A10, is interpreted as a
character, and then causes the leak?

I not sure I understand. The data logger program (above) does not even use A10?

If you are still hitting problems with 1v66, are there any error
messages shown?

Without the computer connected to the Espruino, there would be no way of telling?
I cannot tie my PC up for weeks at a time for this testing.
Note: I created a "standalone" hardware configuration in which the Espruino, DS18B20, LCD 4x20 runs off of a wall-wart.

Maybe, its the 1-wire "12 bit" DS18B20 and I will try substitute this temperature sensor with a constant?