On Sat, Jun 24, 2017 at 12:32:12PM -0400, Leo Famulari wrote:
> compiling...	 99.2% of 606 filesBacktrace:
>            2 (primitive-load "/gnu/store/v9a9cqzh41qg4sixl2mk5kndglp?")
> In ./guix/build/pull.scm:
>     181:8  1 (build-guix _ _ #:system _ #:storedir _ #:localstatedir ?)
> In ice-9/threads.scm:
>    289:22  0 (loop _)
> 
> ice-9/threads.scm:289:22: In procedure loop:
> ice-9/threads.scm:289:22: Wrong type (expecting mutex): (3556 . #<procedure intset-add (bs i)>)

It didn't happen when I re-ran the command.