[Bug-apl] 100?100 hang-up

[Louis de Forcrand]

Hello again,

If I enter 100?100 GNU-APL inexplicably hangs up.
I tried moving up from 90?90 and found that it 
"breaks" at around 90?90, although this is not 
consistent.

^C does nothing.

Again, I'm on 64-bit Mac OS X 10.10.5, 2009 MacBook Pro.

⊣Louis