linux-kernel - Re: linux-next: Tree for Oct 2

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Message-ID: <CANiq72mDsU3W5Qfyf=sKhbad4tAHJYF8WnY+4VPz2J0paA2gTw@mail.gmail.com>
Date: Thu, 2 Oct 2025 23:35:10 +0200
From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To: Dan Carpenter <dan.carpenter@...aro.org>
Cc: rust-for-linux@...r.kernel.org, Mark Brown <broonie@...nel.org>, 
	Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>, 
	Linux Next Mailing List <linux-next@...r.kernel.org>, 
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: linux-next: Tree for Oct 2

On Thu, Oct 2, 2025 at 10:10 PM Dan Carpenter <dan.carpenter@...aro.org> wrote:
>
>   RUSTC L rust/core.o
> error: cannot find a built-in macro with name `define_opaque`
>     --> /usr/lib/rustlib/src/rust/library/core/src/macros/mod.rs:1757:5
>      |
> 1757 | /     pub macro define_opaque($($tt:tt)*) {
> 1758 | |         /* compiler built-in */
> 1759 | |     }
>      | |_____^
>

Thanks Dan.

Hmm... Strange, it is the `core` library, which comes with the
compiler and thus should always work.

So it sounds like a mismatch between the binary used and the sources
of the standard library (or perhaps other kind of mismatch, like the
wrong edition being passed, but from a quick look it doesn't seem like
it).

I will try to reproduce it. Did you happen to recently upgrade the
toolchain(s) or something like that, by chance? Are you using the
Debian packages?

Thanks!

Cheers,
Miguel