altos/scheme: abort when we try to print an invalid value
authorKeith Packard <keithp@keithp.com>
Mon, 18 Dec 2017 10:08:23 +0000 (02:08 -0800)
committerKeith Packard <keithp@keithp.com>
Mon, 18 Dec 2017 10:08:23 +0000 (02:08 -0800)
This can catch a host of interpreter bugs; best to abandon the program
when it happens.

Signed-off-by: Keith Packard <keithp@keithp.com>

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