fix(users/Profpatsch/execline): fix exec_into_args off-by-1 r/2185

We expect the users to pass an actual prog, not an argv, so 0 is the
program to exec into.

Also improve the exec error, by including the program we tried to exec
into (the rust IO error doesn’t contain the name).

Change-Id: I664f9f717e4f82bfc1b1da3bd7114124b7582d5f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2489
Reviewed-by: Profpatsch <mail@profpatsch.de>
Tested-by: BuildkiteCI

0 files changed, 0 insertions, 0 deletions