bug#47007: dcb640f02b broke guix environment --container

[Ludovic Courtès]

Hi,

Jelle Licht <jlicht@fsfe.org> skribis:

> I only tried this on x86_64 guix systems, one with Linux kernel 5.11.2,
> and also on a Linux-libre kernel 4.14.223.
>
> Running the equivalent of a `git bisect' starting some months back to
> today's master, and with the following test to select bad/good bisect 
> revisions:
>
> `./pre-inst-env guix environment --ad-hoc --container --no-cwd --network 
> hello'
>
> leads me to believe that the following commit broke something.
>
> dcb640f02b * file-systems: 'mount-file-system' preserves source flags for 
> bind mounts.
>
> Did this commit expose an existing (but silent) issue, or did it
> introduce something new?
>
> For completeness' sake, the output of the guix environment invocation on
> 'bad' revisions:
>
> guix environment: error: mount: mount 
> "/gnu/store/mmhimfwmmidf09jw1plw3aw1g1zn2nkh-bash-static-5.0.16" on 
> "/tmp/guix-directory.Ji7KNW//gnu/store/mmhimfwmmidf09jw1plw3aw1g1zn2nkh-bash-static-5.0.16":
>  Operation not permitted

Could you run:

  ./pre-inst-env strace -f -o log guix environment --container

and send the ‘log’ file (or the bits around the mount(2) calls)?

Could you also show /proc/mounts?

TIA!

Ludo’.