cannot find macro proc_macro_call_0! in this scope

[fenhl]

I'm hitting this error when trying to use futures::select on the latest nightly.

Minimal example

Cargo.toml:

[package]
name = "select-min"
version = "0.1.0"
edition = "2018"

[dependencies.futures-preview]
version = "=0.3.0-alpha.18"
features = ["async-await", "nightly"]

main.rs:

fn main() {
    futures::select! {}
}

Output of cargo +nightly check:

    Checking select-min v0.1.0 (C:\Users\Fenhl\Desktop\select-min)
error: cannot find macro `proc_macro_call_0!` in this scope
 --> src\main.rs:2:5
  |
2 |     futures::select! {}
  |     ^^^^^^^^^^^^^^^^^^^
  |
  = help: have you added the `#[macro_use]` on the module/import?
  = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)

error: aborting due to previous error

error: Could not compile `select-min`.

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

Adding #[macro_use] extern crate futures; does not fix this.

[Nemo157]

Probably related to dtolnay/proc-macro-hack#40 and rust-lang/rust#63651, seems proc-macro-hack doesn't work on the latest nightlies. Easiest workaround for now is to go back a nightly or two.

[fenhl]

Can confirm, the macro works fine on nightly-2019-08-15.

[lneicelis]

how to set nightly to specific version?

[fenhl]

First, install the nightly with rustup toolchain install nightly-2019-08-15. Then in your crate directory, run rustup override set nightly-2019-08-15. Alternatively, run all cargo commands like e.g. cargo +nightly-2019-08-15 build.

[taiki-e]

Fixed in nightly-2019-08-19.