softmoth/chdir-segfault

## chdir-segfault
#! /usr/bin/env perl6

use Shell::Command;

constant $top = './tmp/junk';

sub MAIN (:$workers = 5, :$levels = '20, 3, 5', Bool :$force = False, Bool :$create-only = False) {
    create-junk($levels.comb(/\d+/)) if $force or not $top.IO.d;
    remove-junk($workers) unless $create-only;
    note "# DONE";
}

sub remove-junk($num-workers) {
    my @work = $top.IO.dir.pairs.classify({.key % $num-workers}).values».value;
    my @threads;
    for @work.kv -> $worker, $work {
        @threads.push: start {
            do-work($worker, $work);
        }
    }

    note "# WORKERS STARTED";
    dd $_ for @threads;
    note "# WAITING FOR WORKERS";
    dd await @threads;
    note "# THREADS AT END";
    dd $_ for @threads;
    rmdir $top;

    sub do-work($id, @jobs) {
        for @jobs -> $job {
            note "#$id $job";
            #sleep 0.5.rand;
            rm_rf $job;
            CATCH { default { note "#$id Error $_" } }
        }
        return "DONE: $id";
    }
}

sub create-junk (@levels) {
    if $top.IO.d {
        note "Removing existing junk '$top'";
        # Too slow
        #rm_rf $top;
        run(<<rm -rf $top>>);
        note "... done.";
    }
    note "Creating junk with {[*] @levels} files (this may take a while)";
    mkdir $top;
    flesh-out($top, @levels);
    #use File::Find; use Test;
    #is +find(:dir($top), :type<file>), ([*] @levels), "Made {[*] @levels} files";

    sub flesh-out($dir, [$size, *@levels]) {
        #dd $size, @levels;
        if @levels > 0 {
            note "# $dir/..." if @levels == 1;
            for ^$size {
                my $name = $*SPEC.catfile($dir, $_);
                mkdir $name;
                flesh-out($name, @levels);
            }
        }
        else {
            for ^$size {
                my $name = $*SPEC.catfile($dir, $_);
                my @cmd = «dd if=/dev/random "of=$name" bs=1024 count=4»;
                #dd @cmd;
                my $proc = run(@cmd, :!err)
                    or die "dd $name failed! $!";
                #note "#DEBUG FILE $name";
            }
        }
    }
}

## output.txt
tsmith@ganesha:~/local/src/p6/tmp/doc/export-ecosystem (master *%>)
[17:04:09] &1 $ perl6 --version
This is perl6 version 2015.07.1-169-g30d6fe7 built on MoarVM version 2015.07-68-g3240047

tsmith@ganesha:~/local/src/p6/tmp/doc/export-ecosystem (master *%>)
[16:37:03] &1 $ time ./chdir-segfault --force --create-only
Removing existing junk './tmp/junk'
... done.
Creating junk with 300 files (this may take a while)
# tmp/junk/0/...
# tmp/junk/1/...
# tmp/junk/2/...
# tmp/junk/3/...
# tmp/junk/4/...
# tmp/junk/5/...
# tmp/junk/6/...
# tmp/junk/7/...
# tmp/junk/8/...
# tmp/junk/9/...
# tmp/junk/10/...
# tmp/junk/11/...
# tmp/junk/12/...
# tmp/junk/13/...
# tmp/junk/14/...
# tmp/junk/15/...
# tmp/junk/16/...
# tmp/junk/17/...
# tmp/junk/18/...
# tmp/junk/19/...
# DONE

real    0m4.818s
user    0m3.186s
sys     0m1.601s

tsmith@ganesha:~/local/src/p6/tmp/doc/export-ecosystem (master *%>)
[16:37:19] &1 $ time ./chdir-segfault --workers=2
# WORKERS STARTED#0 tmp/junk/1
#1 tmp/junk/0

@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
# WAITING FOR WORKERS
#1 tmp/junk/10
#0 tmp/junk/11
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/10': chdir failed: no such file or directory
#1 tmp/junk/12
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/11': chdir failed: no such file or directory
#0 tmp/junk/13
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/12': chdir failed: no such file or directory
#1 tmp/junk/14
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/13': chdir failed: no such file or directory
#0 tmp/junk/15
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/14': chdir failed: no such file or directory
#1 tmp/junk/16
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/15': chdir failed: no such file or directory
#0 tmp/junk/17
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/16': chdir failed: no such file or directory
#1 tmp/junk/18
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/17': chdir failed: no such file or directory
#0 tmp/junk/19
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/18': chdir failed: no such file or directory
#1 tmp/junk/2
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/19': chdir failed: no such file or directory
#0 tmp/junk/3
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/2': chdir failed: no such file or directory
#1 tmp/junk/4
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/3': chdir failed: no such file or directory
#0 tmp/junk/5
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/4': chdir failed: no such file or directory
#1 tmp/junk/6
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/5': chdir failed: no such file or directory
#0 tmp/junk/7
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/6': chdir failed: no such file or directory
#1 tmp/junk/8
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/7': chdir failed: no such file or directory
#0 tmp/junk/9
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/8': chdir failed: no such file or directory
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/9': chdir failed: no such file or directory
("DONE: 0", "DONE: 1")
# THREADS AT END
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
# DONE

real    0m1.536s
user    0m1.774s
sys     0m0.129s

tsmith@ganesha:~/local/src/p6/tmp/doc/export-ecosystem (master *%>)
[16:37:32] &1 $ time ./chdir-segfault --workers=2
# WORKERS STARTED
#0 tmp/junk/11
#1 tmp/junk/10
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
# WAITING FOR WORKERS
#0 tmp/junk/13#1 tmp/junk/12

#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/12': chdir failed: no such file or directory#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/13': chdir failed: no such file or directory

#0 tmp/junk/15
#1 tmp/junk/14
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/15': chdir failed: no such file or directory
#0 tmp/junk/17
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/14': chdir failed: no such file or directory
#1 tmp/junk/16
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/17': chdir failed: no such file or directory
#0 tmp/junk/19
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/16': chdir failed: no such file or directory
#1 tmp/junk/18
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/19': chdir failed: no such file or directory
#0 tmp/junk/3
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/18': chdir failed: no such file or directory
#1 tmp/junk/2
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/3': chdir failed: no such file or directory
#0 tmp/junk/5
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/2': chdir failed: no such file or directory
#1 tmp/junk/4
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/5': chdir failed: no such file or directory
#0 tmp/junk/7
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/4': chdir failed: no such file or directory
#1 tmp/junk/6
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/7': chdir failed: no such file or directory
#0 tmp/junk/9
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/6': chdir failed: no such file or directory
#1 tmp/junk/8
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/9': chdir failed: no such file or directory
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/8': chdir failed: no such file or directory
("DONE: 0", "DONE: 1")
# THREADS AT END
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
# DONE

real    0m1.507s
user    0m1.738s
sys     0m0.132s

tsmith@ganesha:~/local/src/p6/tmp/doc/export-ecosystem (master *%>)
[16:37:35] &1 $ time ./chdir-segfault --workers=2
# WORKERS STARTED#0 tmp/junk/13

#1 tmp/junk/12
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
# WAITING FOR WORKERS
#1 tmp/junk/14
#0 tmp/junk/15
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/14': chdir failed: no such file or directory
#1 tmp/junk/16
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/15': chdir failed: no such file or directory
#0 tmp/junk/17
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/16': chdir failed: no such file or directory
#1 tmp/junk/18
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/17': chdir failed: no such file or directory
#0 tmp/junk/19
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/18': chdir failed: no such file or directory
#1 tmp/junk/2
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/19': chdir failed: no such file or directory
#0 tmp/junk/3
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/2': chdir failed: no such file or directory
#1 tmp/junk/4
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/3': chdir failed: no such file or directory
#0 tmp/junk/5
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/4': chdir failed: no such file or directory
#1 tmp/junk/6
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/5': chdir failed: no such file or directory
#0 tmp/junk/7
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/6': chdir failed: no such file or directory
#1 tmp/junk/8
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/7': chdir failed: no such file or directory
#0 tmp/junk/9
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/8': chdir failed: no such file or directory
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/9': chdir failed: no such file or directory
("DONE: 0", "DONE: 1")
# THREADS AT END
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
# DONE

real    0m1.460s
user    0m1.668s
sys     0m0.121s

tsmith@ganesha:~/local/src/p6/tmp/doc/export-ecosystem (master *%>)
[16:37:39] &1 $ time ./chdir-segfault --workers=2
# WORKERS STARTED
#0 tmp/junk/15
#1 tmp/junk/14
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
# WAITING FOR WORKERS
#0 tmp/junk/17
#1 tmp/junk/16
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/17': chdir failed: no such file or directory
#0 tmp/junk/19
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/16': chdir failed: no such file or directory
#1 tmp/junk/18
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/19': chdir failed: no such file or directory
#0 tmp/junk/3
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/18': chdir failed: no such file or directory
#1 tmp/junk/2
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/3': chdir failed: no such file or directory
#0 tmp/junk/5
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/2': chdir failed: no such file or directory
#1 tmp/junk/4
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/5': chdir failed: no such file or directory
#0 tmp/junk/7
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/4': chdir failed: no such file or directory
#1 tmp/junk/6
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/7': chdir failed: no such file or directory
#0 tmp/junk/9
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/6': chdir failed: no such file or directory
#1 tmp/junk/8
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/9': chdir failed: no such file or directory
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/8': chdir failed: no such file or directory
("DONE: 0", "DONE: 1")
# THREADS AT END
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
# DONE

real    0m1.466s
user    0m1.680s
sys     0m0.122s

tsmith@ganesha:~/local/src/p6/tmp/doc/export-ecosystem (master *%>)
[16:37:44] &1 $ time ./chdir-segfault --workers=5
#0 tmp/junk/2
#1 tmp/junk/19
#2 tmp/junk/17
#3 tmp/junk/16
# WORKERS STARTED
#4 tmp/junk/18
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
# WAITING FOR WORKERS
#3 Error Cannot invoke this object (REPR: Null)
#3 tmp/junk/3
#4 tmp/junk/5
#1 tmp/junk/6
#2 tmp/junk/4
#4 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/5': chdir failed: no such file or directory
#0 tmp/junk/7
#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/6': chdir failed: no such file or directory
#2 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/4': chdir failed: no such file or directory
#2 tmp/junk/9
#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/7': chdir failed: no such file or directory
#2 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/9': chdir failed: no such file or directory
#3 tmp/junk/8
#3 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/8': chdir failed: no such file or directory
("DONE: 0", "DONE: 1", "DONE: 2", "DONE: 3", "DONE: 4")
# THREADS AT END
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
# DONE

real    0m2.146s
user    0m2.998s
sys     0m1.019s

tsmith@ganesha:~/local/src/p6/tmp/doc/export-ecosystem (master *%>)
[16:37:50] &1 $ time ./chdir-segfault --workers=5
#0 tmp/junk/7
#1 tmp/junk/6
#2 tmp/junk/4
#3 tmp/junk/16
# WORKERS STARTED
#4 tmp/junk/5
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
# WAITING FOR WORKERS
moar(27870,0x10e147000) malloc: *** error for object 0x7fae023e58b0: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
Abort trap: 6

real    0m1.479s
user    0m1.118s
sys     0m0.103s
	#! /usr/bin/env perl6

	use Shell::Command;

	constant $top = './tmp/junk';

	sub MAIN (:$workers = 5, :$levels = '20, 3, 5', Bool :$force = False, Bool :$create-only = False) {
	create-junk($levels.comb(/\d+/)) if $force or not $top.IO.d;
	remove-junk($workers) unless $create-only;
	note "# DONE";
	}

	sub remove-junk($num-workers) {
	my @work = $top.IO.dir.pairs.classify({.key % $num-workers}).values».value;
	my @threads;
	for @work.kv -> $worker, $work {
	@threads.push: start {
	do-work($worker, $work);
	}
	}

	note "# WORKERS STARTED";
	dd $_ for @threads;
	note "# WAITING FOR WORKERS";
	dd await @threads;
	note "# THREADS AT END";
	dd $_ for @threads;
	rmdir $top;

	sub do-work($id, @jobs) {
	for @jobs -> $job {
	note "#$id $job";
	#sleep 0.5.rand;
	rm_rf $job;
	CATCH { default { note "#$id Error $_" } }
	}
	return "DONE: $id";
	}
	}

	sub create-junk (@levels) {
	if $top.IO.d {
	note "Removing existing junk '$top'";
	# Too slow
	#rm_rf $top;
	run(<<rm -rf $top>>);
	note "... done.";
	}
	note "Creating junk with {[*] @levels} files (this may take a while)";
	mkdir $top;
	flesh-out($top, @levels);
	#use File::Find; use Test;
	#is +find(:dir($top), :type<file>), ([] @levels), "Made {[] @levels} files";

	sub flesh-out($dir, [$size, *@levels]) {
	#dd $size, @levels;
	if @levels > 0 {
	note "# $dir/..." if @levels == 1;
	for ^$size {
	my $name = $*SPEC.catfile($dir, $_);
	mkdir $name;
	flesh-out($name, @levels);
	}
	}
	else {
	for ^$size {
	my $name = $*SPEC.catfile($dir, $_);
	my @cmd = «dd if=/dev/random "of=$name" bs=1024 count=4»;
	#dd @cmd;
	my $proc = run(@cmd, :!err)
	or die "dd $name failed! $!";
	#note "#DEBUG FILE $name";
	}
	}
	}
	}
	tsmith@ganesha:~/local/src/p6/tmp/doc/export-ecosystem (master *%>)
	[17:04:09] &1 $ perl6 --version
	This is perl6 version 2015.07.1-169-g30d6fe7 built on MoarVM version 2015.07-68-g3240047

	tsmith@ganesha:~/local/src/p6/tmp/doc/export-ecosystem (master *%>)
	[16:37:03] &1 $ time ./chdir-segfault --force --create-only
	Removing existing junk './tmp/junk'
	... done.
	Creating junk with 300 files (this may take a while)
	# tmp/junk/0/...
	# tmp/junk/1/...
	# tmp/junk/2/...
	# tmp/junk/3/...
	# tmp/junk/4/...
	# tmp/junk/5/...
	# tmp/junk/6/...
	# tmp/junk/7/...
	# tmp/junk/8/...
	# tmp/junk/9/...
	# tmp/junk/10/...
	# tmp/junk/11/...
	# tmp/junk/12/...
	# tmp/junk/13/...
	# tmp/junk/14/...
	# tmp/junk/15/...
	# tmp/junk/16/...
	# tmp/junk/17/...
	# tmp/junk/18/...
	# tmp/junk/19/...
	# DONE

	real 0m4.818s
	user 0m3.186s
	sys 0m1.601s

	tsmith@ganesha:~/local/src/p6/tmp/doc/export-ecosystem (master *%>)
	[16:37:19] &1 $ time ./chdir-segfault --workers=2
	# WORKERS STARTED#0 tmp/junk/1
	#1 tmp/junk/0

	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
	# WAITING FOR WORKERS
	#1 tmp/junk/10
	#0 tmp/junk/11
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/10': chdir failed: no such file or directory
	#1 tmp/junk/12
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/11': chdir failed: no such file or directory
	#0 tmp/junk/13
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/12': chdir failed: no such file or directory
	#1 tmp/junk/14
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/13': chdir failed: no such file or directory
	#0 tmp/junk/15
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/14': chdir failed: no such file or directory
	#1 tmp/junk/16
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/15': chdir failed: no such file or directory
	#0 tmp/junk/17
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/16': chdir failed: no such file or directory
	#1 tmp/junk/18
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/17': chdir failed: no such file or directory
	#0 tmp/junk/19
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/18': chdir failed: no such file or directory
	#1 tmp/junk/2
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/19': chdir failed: no such file or directory
	#0 tmp/junk/3
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/2': chdir failed: no such file or directory
	#1 tmp/junk/4
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/3': chdir failed: no such file or directory
	#0 tmp/junk/5
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/4': chdir failed: no such file or directory
	#1 tmp/junk/6
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/5': chdir failed: no such file or directory
	#0 tmp/junk/7
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/6': chdir failed: no such file or directory
	#1 tmp/junk/8
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/7': chdir failed: no such file or directory
	#0 tmp/junk/9
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/8': chdir failed: no such file or directory
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/9': chdir failed: no such file or directory
	("DONE: 0", "DONE: 1")
	# THREADS AT END
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
	# DONE

	real 0m1.536s
	user 0m1.774s
	sys 0m0.129s

	tsmith@ganesha:~/local/src/p6/tmp/doc/export-ecosystem (master *%>)
	[16:37:32] &1 $ time ./chdir-segfault --workers=2
	# WORKERS STARTED
	#0 tmp/junk/11
	#1 tmp/junk/10
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
	# WAITING FOR WORKERS
	#0 tmp/junk/13#1 tmp/junk/12

	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/12': chdir failed: no such file or directory#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/13': chdir failed: no such file or directory

	#0 tmp/junk/15
	#1 tmp/junk/14
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/15': chdir failed: no such file or directory
	#0 tmp/junk/17
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/14': chdir failed: no such file or directory
	#1 tmp/junk/16
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/17': chdir failed: no such file or directory
	#0 tmp/junk/19
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/16': chdir failed: no such file or directory
	#1 tmp/junk/18
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/19': chdir failed: no such file or directory
	#0 tmp/junk/3
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/18': chdir failed: no such file or directory
	#1 tmp/junk/2
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/3': chdir failed: no such file or directory
	#0 tmp/junk/5
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/2': chdir failed: no such file or directory
	#1 tmp/junk/4
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/5': chdir failed: no such file or directory
	#0 tmp/junk/7
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/4': chdir failed: no such file or directory
	#1 tmp/junk/6
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/7': chdir failed: no such file or directory
	#0 tmp/junk/9
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/6': chdir failed: no such file or directory
	#1 tmp/junk/8
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/9': chdir failed: no such file or directory
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/8': chdir failed: no such file or directory
	("DONE: 0", "DONE: 1")
	# THREADS AT END
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
	# DONE

	real 0m1.507s
	user 0m1.738s
	sys 0m0.132s

	tsmith@ganesha:~/local/src/p6/tmp/doc/export-ecosystem (master *%>)
	[16:37:35] &1 $ time ./chdir-segfault --workers=2
	# WORKERS STARTED#0 tmp/junk/13

	#1 tmp/junk/12
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
	# WAITING FOR WORKERS
	#1 tmp/junk/14
	#0 tmp/junk/15
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/14': chdir failed: no such file or directory
	#1 tmp/junk/16
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/15': chdir failed: no such file or directory
	#0 tmp/junk/17
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/16': chdir failed: no such file or directory
	#1 tmp/junk/18
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/17': chdir failed: no such file or directory
	#0 tmp/junk/19
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/18': chdir failed: no such file or directory
	#1 tmp/junk/2
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/19': chdir failed: no such file or directory
	#0 tmp/junk/3
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/2': chdir failed: no such file or directory
	#1 tmp/junk/4
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/3': chdir failed: no such file or directory
	#0 tmp/junk/5
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/4': chdir failed: no such file or directory
	#1 tmp/junk/6
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/5': chdir failed: no such file or directory
	#0 tmp/junk/7
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/6': chdir failed: no such file or directory
	#1 tmp/junk/8
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/7': chdir failed: no such file or directory
	#0 tmp/junk/9
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/8': chdir failed: no such file or directory
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/9': chdir failed: no such file or directory
	("DONE: 0", "DONE: 1")
	# THREADS AT END
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
	# DONE

	real 0m1.460s
	user 0m1.668s
	sys 0m0.121s

	tsmith@ganesha:~/local/src/p6/tmp/doc/export-ecosystem (master *%>)
	[16:37:39] &1 $ time ./chdir-segfault --workers=2
	# WORKERS STARTED
	#0 tmp/junk/15
	#1 tmp/junk/14
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
	# WAITING FOR WORKERS
	#0 tmp/junk/17
	#1 tmp/junk/16
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/17': chdir failed: no such file or directory
	#0 tmp/junk/19
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/16': chdir failed: no such file or directory
	#1 tmp/junk/18
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/19': chdir failed: no such file or directory
	#0 tmp/junk/3
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/18': chdir failed: no such file or directory
	#1 tmp/junk/2
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/3': chdir failed: no such file or directory
	#0 tmp/junk/5
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/2': chdir failed: no such file or directory
	#1 tmp/junk/4
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/5': chdir failed: no such file or directory
	#0 tmp/junk/7
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/4': chdir failed: no such file or directory
	#1 tmp/junk/6
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/7': chdir failed: no such file or directory
	#0 tmp/junk/9
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/6': chdir failed: no such file or directory
	#1 tmp/junk/8
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/9': chdir failed: no such file or directory
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/8': chdir failed: no such file or directory
	("DONE: 0", "DONE: 1")
	# THREADS AT END
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
	# DONE

	real 0m1.466s
	user 0m1.680s
	sys 0m0.122s

	tsmith@ganesha:~/local/src/p6/tmp/doc/export-ecosystem (master *%>)
	[16:37:44] &1 $ time ./chdir-segfault --workers=5
	#0 tmp/junk/2
	#1 tmp/junk/19
	#2 tmp/junk/17
	#3 tmp/junk/16
	# WORKERS STARTED
	#4 tmp/junk/18
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
	# WAITING FOR WORKERS
	#3 Error Cannot invoke this object (REPR: Null)
	#3 tmp/junk/3
	#4 tmp/junk/5
	#1 tmp/junk/6
	#2 tmp/junk/4
	#4 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/5': chdir failed: no such file or directory
	#0 tmp/junk/7
	#1 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/6': chdir failed: no such file or directory
	#2 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/4': chdir failed: no such file or directory
	#2 tmp/junk/9
	#0 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/7': chdir failed: no such file or directory
	#2 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/9': chdir failed: no such file or directory
	#3 tmp/junk/8
	#3 Error Failed to get the directory contents of '/Users/tsmith/local/src/p6/tmp/doc/export-ecosystem/tmp/junk/8': chdir failed: no such file or directory
	("DONE: 0", "DONE: 1", "DONE: 2", "DONE: 3", "DONE: 4")
	# THREADS AT END
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Kept)
	# DONE

	real 0m2.146s
	user 0m2.998s
	sys 0m1.019s

	tsmith@ganesha:~/local/src/p6/tmp/doc/export-ecosystem (master *%>)
	[16:37:50] &1 $ time ./chdir-segfault --workers=5
	#0 tmp/junk/7
	#1 tmp/junk/6
	#2 tmp/junk/4
	#3 tmp/junk/16
	# WORKERS STARTED
	#4 tmp/junk/5
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
	@threads = Promise.new(scheduler => ThreadPoolScheduler.new(initial_threads => 0, max_threads => 16, uncaught_handler => Callable), status => PromiseStatus::Planned)
	# WAITING FOR WORKERS
	moar(27870,0x10e147000) malloc: *** error for object 0x7fae023e58b0: pointer being freed was not allocated
	*** set a breakpoint in malloc_error_break to debug
	Abort trap: 6

	real 0m1.479s
	user 0m1.118s
	sys 0m0.103s