bug#35192: `current-source-directory' fails when file-name #f

[Maxim Cournoyer]

Hello Alex!

Alex Sassmannshausen <address@hidden> writes:

> Hello,
>
> re: /guix/utils.scm:748:
>
> When file-name is #f (e.g. in a geiser repl), the procedure's match
> fails. `assq' returns ('filename . #f).  This is handled in the match
> bodies cond clause, but excluded as possibility by the encapsulating
> match clause.
>
> Alex

Thank you for the fix!  I had the same problem when experimenting at the
REPL, and the comment about Geiser in the code didn't help.

I've pushed this change as commit
b997d43214445462f23947afbbcadf24c6018217.

Closing!

Maxim