[perl #126587] [BUG] require inside thread segfault hang

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# New Ticket Created by  Lloyd Fournier 
# Please include the string:  [perl #126587]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/Ticket/Display.html?id=126587 >


Two async + require bugs. Replace LWP::Simple with whatever you like
(except for builtins like Test which seem to work no matter what)

1. segfault

Thread.start({ say "entering"; require LWP::Simple; say "leaving" })
#both enters and leaves but segfault when it's done.

2. HTTP::Server::Tiny hangs

use HTTP::Server::Tiny;

HTTP::Server::Tiny.new(port => 8080).run: sub ($env) {
    note "requiring!";
    require LWP::Simple; # or whatever
    note "we got it!";
    return 200, ['Content-Type' => 'text/plain'], 'we win';
};

# then curl localhost:8080, you'll only get "requiring!".

This is perl6 version 2015.10-220-g4988c70 built on MoarVM version
2015.10-61-g624d504

Mac OSX