From @zoffixznet

  zoffix@​VirtualBox~/CPANPRC/rakudo (nom)$ cat bar.p6
  for ^4000 {
  my $p = run(​:out, :bin, 'ls'); run(​:in($p.out), 'true')
  }
  zoffix@​VirtualBox~/CPANPRC/rakudo (nom)$ ./perl6 bar.p6
  Unhandled exception in code scheduled on thread 12
  Tried to get the result of a broken Promise

  Original exception​:
  This process is not opened for write

  zoffix@​VirtualBox~/CPANPRC/rakudo (nom)$

From @zoffixznet

P.S.​: the test for this ticket already exists as test #​2 in t/spec/S17-procasync/stress.t

It's an old test that now flops once in a while.

From @jnthn

On Sat, 17 Jun 2017 22​:18​:31 -0700, cpan@​zoffix.com wrote​:

zoffix@​VirtualBox~/CPANPRC/rakudo \(nom\)$ cat bar\.p6
for ^4000 \{
    my $p = run\(​:out, :bin, 'ls'\); run\(​:in\($p\.out\), 'true'\)
\}
zoffix@​VirtualBox~/CPANPRC/rakudo \(nom\)$ \./perl6 bar\.p6 
Unhandled exception in code scheduled on thread 12
Tried to get the result of a broken Promise

Original exception​:
    This process is not opened for write

zoffix@​VirtualBox~/CPANPRC/rakudo \(nom\)$ 

Fixed by recent changes to handle code like this by plumbing descriptors together. A further fix has made it not end up running out of descriptors also.

The RT System itself - Status changed from 'new' to 'open'

@jnthn - Status changed from 'open' to 'resolved'