Impossible to install via cargo

[aborruso]

Describe the bug

When I run cargo install nu --verbose, I have compiling error.

How to solve it?

To Reproduce
Steps to reproduce the behavior:

1. simply running cargo install nu --verbose

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
If applicable, add screenshots to help explain your problem.

   Compiling rust-embed-impl v5.7.0
     Running `rustc --crate-name rust_embed_impl --edition=2018 /home/aborruso/.cargo/registry/src/github.com-1ecc6299db9ec823/rust-embed-impl-5.7.0/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type proc-macro --emit=dep-info,link -C prefer-dynamic -C opt-level=z -Cembed-bitcode=no -C codegen-units=1 -C metadata=e85d3f6f227765de -C extra-filename=-e85d3f6f227765de --out-dir /tmp/cargo-installz0XnRM/release/deps -L dependency=/tmp/cargo-installz0XnRM/release/deps --extern quote=/tmp/cargo-installz0XnRM/release/deps/libquote-ef8440215e0282f2.rlib --extern rust_embed_utils=/tmp/cargo-installz0XnRM/release/deps/librust_embed_utils-9e501703b7a8c3b0.rlib --extern syn=/tmp/cargo-installz0XnRM/release/deps/libsyn-74e5419c3d256976.rlib --extern walkdir=/tmp/cargo-installz0XnRM/release/deps/libwalkdir-21dd448c8904f42a.rlib --extern proc_macro --cap-lints allow`
error[E0432]: unresolved import `syn::export`
 --> /home/aborruso/.cargo/registry/src/github.com-1ecc6299db9ec823/rust-embed-impl-5.7.0/src/lib.rs:8:11
  |
8 | use syn::{export::TokenStream2, Data, DeriveInput, Fields, Lit, Meta};
  |           ^^^^^^ could not find `export` in `syn`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0432`.
error: could not compile `rust-embed-impl`.

Caused by:
  process didn't exit successfully: `rustc --crate-name rust_embed_impl --edition=2018 /home/aborruso/.cargo/registry/src/github.com-1ecc6299db9ec823/rust-embed-impl-5.7.0/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type proc-macro --emit=dep-info,link -C prefer-dynamic -C opt-level=z -Cembed-bitcode=no -C codegen-units=1 -C metadata=e85d3f6f227765de -C extra-filename=-e85d3f6f227765de --out-dir /tmp/cargo-installz0XnRM/release/deps -L dependency=/tmp/cargo-installz0XnRM/release/deps --extern quote=/tmp/cargo-installz0XnRM/release/deps/libquote-ef8440215e0282f2.rlib --extern rust_embed_utils=/tmp/cargo-installz0XnRM/release/deps/librust_embed_utils-9e501703b7a8c3b0.rlib --extern syn=/tmp/cargo-installz0XnRM/release/deps/libsyn-74e5419c3d256976.rlib --extern walkdir=/tmp/cargo-installz0XnRM/release/deps/libwalkdir-21dd448c8904f42a.rlib --extern proc_macro --cap-lints allow` (exit code: 1)
warning: build failed, waiting for other jobs to finish...
error: failed to compile `nu v0.25.0`, intermediate artifacts can be found at `/tmp/cargo-installz0XnRM`

[sophiajt]

@aborruso - what version of rustc are you using? You'll need a stable that's pretty recent, say something like 1.48 or even 1.49.

[TrevorAC99]

@aborruso - what version of rustc are you using? You'll need a stable that's pretty recent, say something like 1.48 or even 1.49.

I received this same error in Windows using 1.48 of rustc. I'm trying again with 1.49 right now.

Edit: It also fails on 1.49

[aborruso]

I have rustc 1.46.0. I try to update it

[pantharshit00]

I can also reproduce this when I tried updating to v0.25

[aborruso]

I have used rustup update stable and now I have 1.49.

And I have again

   Compiling async-recursion v0.3.1
error[E0432]: unresolved import `syn::export`
 --> /home/aborruso/.cargo/registry/src/github.com-1ecc6299db9ec823/rust-embed-impl-5.7.0/src/lib.rs:8:11
  |
8 | use syn::{export::TokenStream2, Data, DeriveInput, Fields, Lit, Meta};
  |           ^^^^^^ could not find `export` in `syn`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0432`.
error: could not compile `rust-embed-impl`

To learn more, run the command again with --verbose.
warning: build failed, waiting for other jobs to finish...
error: failed to compile `nu v0.25.0`, intermediate artifacts can be found at `/tmp/cargo-installIY3TFP`

Caused by:
  build failed

[TrevorAC99]

This may or may not be relevant but when I cloned the repository and built it using cargo build, it worked fine. For some reason, installing from crates.io has problems.

[sophiajt]

We're working around this issue with #2868

Looks like the root cause is a semver-incompatible change that went out in the latest syn crate. We're currently going to pin to an older version and release. That should at least unblock the builds for everyone.

[sophiajt]

This should be fixed with 0.25.1. If you're still seeing it, please reopen.

[aborruso]

This should be fixed with 0.25.1. If you're still seeing it, please reopen.

It works, thank you