bug#39377: guix search reports bad location for bytestructures

[Matt Wette]

I'm using guix-1.0.1 on Fedora 30, x86_64.

I wanted to get module spec for bytestructures, but failed:
location points to (guix packages), but it's actually in (gnu packages 
guile).

$ guix search bytestructures
name: guile3.0-bytestructures
version: 1.0.7
outputs: out
systems: x86_64-linux i686-linux
dependencies: autoconf@2.69 automake@1.16.1 guile-next@3.0.0 
pkg-config@0.29.2
location: guix/packages.scm:880:11
homepage: https://github.com/TaylanUB/scheme-bytestructures
license: GPL 3+
synopsis: Structured access to bytevector contents for Guile
description: Guile bytestructures offers a system imitating the type 
system of
+ the C programming language, to be used on bytevectors.  C's type 
system works
+ on raw memory, and Guile works on bytevectors which are an abstraction 
over
+ raw memory.  It's also more powerful than the C type system, elevating 
types
+ to first-class status.
relevance: 6

$ guix repl
scheme@(guix-user)> guile3.0-bytestructures
;;; <unknown-location>: warning: possibly unbound variable 
`guile3.0-bytestructures'
ERROR: error: guile3.0-bytestructures: unbound variable

Entering a new prompt.  Type `,bt' for a backtrace or `,q' to continue.
scheme@(guix-user) [1]> ,use (gnu packages guile)
scheme@(guix-user) [1]> guile3.0-bytestructures
$1 = #<package guile3.0-bytestructures@1.0.7 guix/packages.scm:880 
7f639f9532c0>