Slave write crash if onRequest doesn't return any byte

[Benoit3]

Hello,
I'm new to arduino (but with i2c driven wiritten on 6805 and 8051 25 years ago..), this issue could be completely wrong. I'm using the python read_i2c_block_data for master, a PI with I2c at 10 kHz and attiny45 at 8 MHz for the slave

If for some reason the onRequest callback doesn't provide any byte (with TinyWire.send) i2c slave feature is definitively lost . I studied the code but didn't found anything.

The workaround is to always send some data in the callback.

Thank for your library which is very helpfull.
Benoit