While Loop in an interrupt

hey guys!

got problem interrupt loop:

code: [select]


void setup {
  attachinterrupt(0, shutdown, rising);
}


void shutdown() {
  serial.print('a');
  breakson();
  while (1) {
    serial.print('a');
    serial.print(",");   
    delay(1000);
  }

}

i strange behaviour:
when press interrupt button, while loop seems loop endlessly without sending serial 'a', if comment out of while (1) loop, serial monitor sends , executes breakson function intended.
any advice here? can't work out.

http://www.gammon.com.au/interrupts

don't serial prints inside interrupts. don't use delay.

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