In ice-9/ports.scm:
    478:4 19 (with-error-to-port _ _)
In guix/build/utils.scm:
    654:6 18 (invoke _ . _)
In ice-9/boot-9.scm:
  1669:16 17 (raise-exception _ #:continuable? _)
  1667:16 16 (raise-exception _ #:continuable? _)
  1667:16 15 (raise-exception _ #:continuable? _)
  1667:16 14 (raise-exception _ #:continuable? _)
  1667:16 13 (raise-exception _ #:continuable? _)
  1667:16 12 (raise-exception _ #:continuable? _)
  1667:16 11 (raise-exception _ #:continuable? _)
  1667:16 10 (raise-exception _ #:continuable? _)
  1667:16  9 (raise-exception _ #:continuable? _)
  1667:16  8 (raise-exception _ #:continuable? _)
  1667:16  7 (raise-exception _ #:continuable? _)
  1764:13  6 (_ #<&invoke-error program: "mkswap" arguments: ("-f" "/dev/sda3") exit-status: 1 term-signal: #f stop-signal: #f>)
In ice-9/eval.scm:
    619:8  5 (_ #(#(#<directory (guile-user) 7f2d93296c80> #<<installer> name: newt init: #<procedure init ()> exit: #<procedure exit ()> exit-error: #<procedure exit-error (file key args)> f…>) …))
    619:8  4 (_ #(#(#(#<directory (guile-user) 7f2d93296c80> #<<installer> name: newt init: #<procedure init ()> exit: #<procedure exit ()> exit-error: #<procedure exit-error (file key arg…>) …) #))
In ice-9/ports.scm:
   463:17  3 (call-with-output-file _ _ #:binary _ #:encoding _)
In ice-9/eval.scm:
    619:8  2 (_ #(#(#<directory (guile-user) 7f2d93296c80> %exception (#<&invoke-error program: "mkswap" arguments: ("-f" "/dev/sda3") exit-status: 1 term-signal: #f stop-signal: #f>)) #<output:…>))
    159:9  1 (_ #(#(#<directory (guile-user) 7f2d93296c80> %exception (#<&invoke-error program: "mkswap" arguments: ("-f" "/dev/sda3") exit-status: 1 term-signal: #f stop-signal: #f>)) #<output:…>))
In unknown file:
           0 (make-stack #t)
ice-9/eval.scm:159:9: ERROR:
  1. &invoke-error:
      program: "mkswap"
      arguments: ("-f" "/dev/sda3")
      exit-status: 1
      term-signal: #f
      stop-signal: #f