compile error in piet-direct2d

[Aniki02]

Hello.

Rustc is update to 1.47.0. I am using Windows 7 and my default toolchain is stable-x86_64-pc-windows-gnu.

I wanted to test cross platform with a little example. No worries when I compil in linux or macos, but in windows there is that compil error.
br C:\Users\Documents\projects\piet-crossplatform-example
$ cargo update
Updating crates.io index

br C:\Users\Documents\projects\piet-crossplatform-example
$ cargo clean

br C:\Users\Documents\projects\piet-crossplatform-example
$ cargo build
Compiling winapi-x86_64-pc-windows-gnu v0.4.0
Compiling winapi v0.3.9
Compiling libc v0.2.79
Compiling byteorder v1.3.4
Compiling bitflags v1.2.1
Compiling arrayvec v0.5.1
Compiling crc32fast v1.2.0
Compiling adler32 v1.2.0
Compiling cfg-if v0.1.10
Compiling lazy_static v1.4.0
Compiling utf16_lit v1.0.1
Compiling associative-cache v1.0.1
Compiling miniz_oxide v0.3.7
Compiling kurbo v0.6.3
Compiling piet v0.2.0-pre5
Compiling deflate v0.8.6
Compiling png v0.16.7
Compiling wio v0.2.2
Compiling dwrote v0.11.0
Compiling piet-direct2d v0.2.0-pre5
error[E0658]: procedural macros cannot be expanded to expressions
--> C:\Users.cargo\registry\src\github.com-1ecc6299db9ec823\piet-direct2d-0.2.0-pre5\src\dwrite.rs:39:32
|
39 | const DEFAULT_LOCALE: &[u16] = utf16_lit::utf16_null!("en-US");
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: see issue #54727 rust-lang/rust#54727 for more information

error: aborting due to previous error

For more information about this error, try rustc --explain E0658.
error: could not compile piet-direct2d.

To learn more, run the command again with --verbose.

[cmyr]

Are you sure you're running 1.47.0? This feature was only stabilized recently..

[Aniki02]

this is the answer when I use rustup show :

$ rustup show
Default host: x86_64-pc-windows-gnu
rustup home: C:\Users.rustup

installed toolchains

stable-x86_64-pc-windows-gnu (default)
stable-x86_64-pc-windows-msvc
nightly-x86_64-pc-windows-gnu
1.7.0-x86_64-pc-windows-gnu

active toolchain

stable-x86_64-pc-windows-gnu (default)
rustc 1.47.0 (18bf6b4f0 2020-10-07)

[Aniki02]

you can find my example with this link : https://gitlab.com/aniki02/piet-crossplatform-example

[Aniki02]

You were right. Rustc version was the problem.

With rustup show, the rustc version was 1.47.0 but with rustc --version it was 1.43.0.
I fixed it by removing the second version of rustc and keeping that was save in /.cargo.

Thank you, I close this issue