https://issues.dlang.org/show_bug.cgi?id=17476
--- Comment #8 from Vladimir Panteleev <thecybersha...@gmail.com> --- (In reply to Mathias Lang from comment #7) > How can > "foobar" be printed twice if it's only set for one thread ? Because both times "foobar" is written are done from the same (main) thread. parallel() can (and does) reuse threads. --