python dependency scan races with script exit

[tik-stbuehler]

When the python script already terminated once the scan completes, it shows all python modules as uses obsolete script file(s):.

I think this happens here:

needrestart/perl/lib/NeedRestart/Interp/Python.pm

Lines 236 to 239 in 6d7a76b

	my %ret = map {
	my $stat = nr_stat("/proc/$pid/root/$_");
	$_ => ( defined($stat) ? $stat->{ctime} : undef );
	} keys %files;

"/proc/$pid/root/..." is already gone cause the process is gone, so it will show all files with a missing timestamp, and I guess the main handler doesn't like this?

Inserting this after the block above seems to "fix" it:

%ret = () unless -d "/proc/$pid/root";  # ignore everything if process is already gone

It might be a good idea to generically ignore all processes that are already gone (no idea whether other interpreter modules have the same issue).

Context: debian trixie, running a lot of python scripts in icinga2 context (checks), and needrestart often wants to restart icinga due to python scripts that "use obsolete file(s)" (all false positives).