Error reading rustc version

[Ronaldho80]

Dear all,

I get the above error on my VM / Windows 7 / 64Bit / GNU / MSYS2 installation when I want to do an update on rust nightly.

I do not get that error if I install an older version of rust nightly (2018-02-01 for example).

However, even if I use the old rustc nightly, I get the following error for cargo build:

$ cargo build
    Updating registry `https://github.com/rust-lang/crates.io-index`
error: process didn't exit successfully: `rustc -vV` (exit code: 3221225595)

After other unsuccessful tries, I removed MSYS2 completely and re-did the installation with rustup-init.exe. I downloaded the latest rustup-init.exe (64 Bit) and started the installation. I got this error:

Current installation options:

   default host triple: gnu
     default toolchain: nightly
  modify PATH variable: yes

1) Proceed with installation (default)
2) Customize installation
3) Cancel installation
1

thread 'main' panicked at '', src\libcore\option.rs:874:4
note: Run with `RUST_BACKTRACE=1` for a backtrace.

[zoumi]

system: WIndows 7 64bit

run with git bash:

$ rustup toolchain install nightly-i686-pc-windows-gnu
info: syncing channel updates for 'nightly-i686-pc-windows-gnu'
info: latest update on 2018-04-19, rust version 1.27.0-nightly (ac3c2288f 2018-04-18)
info: downloading component 'rustc'
info: downloading component 'rust-std'
info: downloading component 'cargo'
info: downloading component 'rust-docs'
info: downloading component 'rust-mingw'
info: installing component 'rustc'
info: installing component 'rust-std'
info: installing component 'cargo'
info: installing component 'rust-docs'
info: installing component 'rust-mingw'

  nightly-i686-pc-windows-gnu installed - (error reading rustc version)


$ cargo build
warning: profiles for the non root package will be ignored, specify profiles at the workspace root:
package:   H:\work\rust_projects\helper_client\Cargo.toml
workspace: H:\work\rust_projects\helper\Cargo.toml
error: process didn't exit successfully: `rustc -vV` (exit code: 3221225785)

If I run rustc within cmd.exe, it says can not locate CreateMutexA in api-ms-win-core-synch-l1-2-0.dll

[zoumi]

BTW,how to fallback nightly with a version??

$ rustup install nightly1.27.0-i686-pc-windows-gnu
error: toolchain 'nightly1.27.0-i686-pc-windows-gnu' is not installed

did not work.

[Diggsey]

Dup of #1386

@zoumi looks like your issue is unrelated to rustup: rust-lang/rust#49438

[zoumi]

@Diggsey I have installed nightly-2018-04-27-i686-pc-windows-gnu, it works for me now.
BTW,

rustup update

is a bad idea.

rustup install nightly-yyyy-mm-dd-i686-pc-windows-gnu

is better!