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Re: rustc 'deadlock detected'

On Sat, Oct 19, 2019 at 04:03:57PM +0100, Mike Pumford wrote:
> I've reported this in the past as intermittent and for a long time it had
> completely disappeared so I wasn't really able to debug it.
> However I've now got into a state where I'm seeing this pretty much 100% of
> the time both in a standalone build chroot and in my auto builds.
> Build system is:
> NetBSD 9.0_BETA NetBSD 9.0_BETA (GENERIC) #0: Fri
> Oct 18 20:30:55 BST 2019
> Failure I'm seeing (Although not always in exactly the same place)
>     Compiling proc-macro2 v0.4.30
>     Compiling unicode-xid v0.1.0
>     Compiling syn v0.15.35
>     Compiling ryu v1.0.0
>     Compiling serde v1.0.92
>     Compiling libc v0.2.60
>     Compiling fixedbitset v0.1.9
>     Compiling ordermap v0.3.5
>  dead lock detected
>  error: Could not compile `proc-macro2`.
>  warning: build failed, waiting for other jobs to finish...
> It was pointed out last time I raised this that the message comes from
> rtld.c (Where it appears twice). I don't get any core dumps that I can debug
> to work out what is going wrong. Is there anything I can do to help track
> this down?

Have a look at the detective work going on in PR pkg/54192.



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