I got a similar error on macOS Sierra 10.12.6 with SBCL 1.3.18.105-f0b6b7c23, unintentionally while building something. scymtym suggested it could have been NTP setting the clock back, which seems plausible.
Backtrace attached. Just posting on the off chance it helps.
I got a similar error on macOS Sierra 10.12.6 with SBCL 1.3.18. 105-f0b6b7c23, unintentionally while building something. scymtym suggested it could have been NTP setting the clock back, which seems plausible.
Backtrace attached. Just posting on the off chance it helps.