bug#34995: `guix pull` crash on commit 69cae3d33

[Leo Famulari]

`guix pull` is crashing for me like this:

$ guix pull --substitute-urls=https://ci.guix.info
Updating channel 'guix' from Git repository at 
'https://git.savannah.gnu.org/git/guix.git'...
Building from this channel:
  guix      https://git.savannah.gnu.org/git/guix.git   69cae3d
substitute: updating substitutes from 'https://ci.guix.info'... 100.0%
Computing Guix derivation for 'x86_64-linux'... |Backtrace:
          10 (primitive-load "/gnu/store/dml4spg4jl3nqqqgsw76pj74bas?")
In ice-9/eval.scm:
    155:9  9 (_ _)
    159:9  8 (_ #(#(#(#(#(#(#(#(#(#(#(?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?))
In ./guix/store.scm:
  1737:24  7 (run-with-store _ _ #:guile-for-build _ #:system _ # _)
In ./guix/self.scm:
    988:2  6 (_ _)
In ./guix/packages.scm:
  1309:17  5 (_ #<store-connection 256.99 120cfa0>)
   934:16  4 (cache! #<weak-table 0/113> #<package address@hidden ./gn?> ?)
  1255:22  3 (thunk)
   934:16  2 (cache! #<weak-table 0/223> #<package address@hidden ./gn?> ?)
  1039:46  1 (thunk)
In ./gnu/packages/bootstrap.scm:
    150:4  0 (inputs)

./gnu/packages/bootstrap.scm:150:4: In procedure inputs:
Wrong number of arguments to #<procedure inputs (x)>
guix pull: error: You found a bug: the program 
'/gnu/store/dml4spg4jl3nqqqgsw76pj74bash1h8h-compute-guix-derivation'
failed to compute the derivation for Guix (version: 
"69cae3d3356a69b7fe69481338f760545995485e"; system: "x86_64-linux";
host version: "d349e6d9a8602ebb21433fb4db0f5a2f03afe78e"; pull-version: 1).
Please report it by email to <address@hidden>.