With 21.2.1 I get:

>> (log #c(0 1) #c(0 -1))

Debugger received error of type: DIVISION-BY-ZERO
#<a DIVISION-BY-ZERO 0x7f8925037640>
Error flushed.

gcl, sbcl and ccl all return #C(-1.0 0.0).

other non-lisp software agrees.

i haven't yet tried master.

-JimC
-- 
James Cloos <cl...@jhcloos.com>         OpenPGP: 0x997A9F17ED7DAEA6

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