# New Ticket Created by Leon Timmermans
# Please include the string: [perl #122722]
# in the subject line of all future correspondence about this issue.
# <URL: https://rt.perl.org/Ticket/Display.html?id=122722 >
As per subject, Proc::Async's streams may call &done() before calling their
&tap/&act for the last time. Take for example this code:
my $num = @*ARGS.shift // 3;
my @procs = (1..$num).map( -> $count {
my $proc = Proc::Async.new(:path('echo'), :args(<Hello World>));
my $input = $proc.stdout_chars();
$input.act(-> $input { say "$count: " ~ $input.chomp }, :done({ say "$count
is done" }));
{ :$proc, :$input, :done($proc.start()) };
});
await @procs.map(*.<done>);
It will give a non-deterministic output, that will typically look something
like this:
1 is done
1 is done
1: Hello World
2: Hello World
2 is done
2 is done
3 is done
3 is done
3: Hello World
(the double done's are reported as #122714)
It sometimes also includes errors such as:
Unhandled exception in code scheduled on thread 140254841403136
or
This representation (Null) does not support elems
Not sure what's going on exactly, but this is limiting the use of the output
Supplies greatly.
Leon
