BUG when initialising an integer with -1

Hello!

I have found a bug and shortly discussed it with other members here: BUG? - initialisation of integer with -1 fails! Please confirm - Programming Questions - Arduino Forum Another member can confirm the faulty behaviour.
Shortly, a variable that is initialised with "-1" before the setup()-function won't have this value in the loop()-function. Please look at the link for details.

bumberle

See: When does -1 != -1 ? - Programming Questions - Arduino Forum

And: bug in optiboot bootloader - Microcontrollers - Arduino Forum