Setup:
  • person 1 on Mac OSX, using keyboard layout USA
  • person 2 on Mac OSX, using keyboard layout Belgian(period)
  1. Person 1 shares their screen
  2. Person 2 takes control
  3. Person 2 types alt+(, which doesn't produce the intended character { on the host
  4. Person 2 changes the host's keyboard layout to Belgian(period)
  5. Person 2 types alt+( again
  6. Person 1's screen instance crashes
Tried to reproduce several times, it's always instant hit. It doesn't crash if Person 2 changes the host's keyboard layout before typing anything.