Re: Time travel accident

[Konrad Hinsen <konrad.hinsen@fastmail.net>]

Julien Lepiller <julien@lepiller.eu> writes:

> If you're able to find the derivation, you could set your system time
> and guix build /gnu/store/that.drv. this should not require network at
> all, so guix shouldn't complain.

Sounds good. The error message contains the path to the derivation,
so... let's just do it!

A few minutes later: I can't do anything at all with time-machine on
that commit any more. Maybe my attempt to build with a modified system
time broke something in the store?

   $ guix time-machine --commit=ce35dc84a10b05dc891bfae03f613b907337945e --
shell --pure python  -- python3
...
   building /gnu/store/6126jqfx0rk9cccm518f53li2nj1q1h0-inferior-script.scm.drv...
   building package cache...
   building profile with 1 package...
   ;;; WARNING: loading compiled file /gnu/store/41zsnwsk02549kqb5njd3fadgnmkzww8-guix-module-union/lib/guile/3.0/site-ccache/guix/ui.go failed:
   ;;; In procedure load-thunk-from-memory: incompatible bytecode kind
...
   ;;; WARNING: loading compiled file /gnu/store/41zsnwsk02549kqb5njd3fadgnmkzww8-guix-module-union/lib/guile/3.0/site-ccache/guix/licenses.go failed:
   ;;; In procedure load-thunk-from-memory: incompatible bytecode kind
   WARNING: Use of `load' in declarative module (guix ui).  Add #:declarative? #f to your define-module invocation.
   Backtrace:
              5 (primitive-load "/home/hinsen/.cache/guix/inferiors/wisrwo5p2aq7o6r…")
   In ice-9/eval.scm:
       619:8  4 (_ #(#(#<directory (guix ui) 7f7fc35115a0>) "/home/hinsen/.cache…" …))
       619:8  3 (_ #(#(#<directory (guix ui) 7f7fc35115a0>)))
       159:9  2 (_ #(#(#<directory (guix ui) 7f7fc35115a0>)))
      223:20  1 (proc #(#(#<directory (guix ui) 7f7fc35115a0>)))
   In unknown file:
              0 (%resolve-variable (7 . _IOLBF) #<directory (guix ui) 7f7fc35115a0>)

   ERROR: In procedure %resolve-variable:
   _IOLBF: unbound variable

In an attempt to clean up, I deleted ~/.cache/guix/inferiors, and then
did a "guix gc". But that makes no difference.

Time travelers live dangerously!

Cheers,
  Konrad.