https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67436
--- Comment #2 from Johannes S. Mueller-Roemer <j.s.mueller-roemer at gmx dot
net> ---
(In reply to Jonathan Wakely from comment #1)
> (In reply to Johannes S. Mueller-Roemer from comment #0)
> > I encountered an error with a missing __tls_init after using a thread_local
> > variable within a generic lambda. I was able to work around this bug by
> > creating a reference to the thread_local and using the reference in the
> > lambda instead.
>
> That sounds similar to an example discussed by the committee recently:
>
> void f() {
> thread_local int n = 10;
> std::thread([&] { std::cout << n << std::endl; }).join();
> }
Yes, however in this case the lambda is called in the same thread in which it
is created.
> The reference to n inside the lambda is to the variable in the new thread,
> which was never initialized because the flow of control never reached its
> initializer. This is probably a defect in the standard.
Odd, I would expect the reference to be evaluated on lambda creation not
execution.
