根据https://www.rust-lang.org/tools/install，WSL安装rust使用命令
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
报错
info: downloading installer
Welcome to Rust!
This will download and install the official compiler for the Rust
programming language, and its package manager, Cargo.
Rustup metadata and toolchains will be installed into the Rustup
home directory, located at:
/home/ayka_tsuzuki/.rustup
This can be modified with the RUSTUP_HOME environment variable.
The Cargo home directory located at:
/home/ayka_tsuzuki/.cargo
This can be modified with the CARGO_HOME environment variable.
The cargo, rustc, rustup and other commands will be added to
Cargo's bin directory, located at:
/home/ayka_tsuzuki/.cargo/bin
This path will then be added to your PATH environment variable by
modifying the profile files located at:
/home/ayka_tsuzuki/.profile
/home/ayka_tsuzuki/.zprofile
You can uninstall at any time with rustup self uninstall and
these changes will be reverted.
Current installation options:
default host triple: x86_64-unknown-linux-gnu
default toolchain: stable (default)
profile: default
modify PATH variable: yes
1) Proceed with installation (default)
2) Customize installation
3) Cancel installation
>1
info: profile set to 'default'
info: default host triple is x86_64-unknown-linux-gnu
info: syncing channel updates for 'stable-x86_64-unknown-linux-gnu'
462.8 KiB / 462.8 KiB (100 %) 108.0 KiB/s in 4s ETA: 0s
info: latest update on 2020-08-03, rust version 1.45.2 (d3fb005a3 2020-07-31)
info: downloading component 'cargo'
info: downloading component 'clippy'
info: downloading component 'rust-docs'
info: downloading component 'rust-std'
info: downloading component 'rustc'
info: downloading component 'rustfmt'
info: installing component 'cargo'
info: Defaulting to 500.0 MiB unpack ram
thread 'main' panicked at 'assertion failed: `(left == right)`
left: `22`,
right: `4`', src/libstd/sys/unix/thread.rs:179:21
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
thread 'main' panicked at 'assertion failed: `(left == right)`
left: `22`,
right: `4`', src/libstd/sys/unix/thread.rs:179:21
stack backtrace:
0: 0x7f0f95edaffd - backtrace::backtrace::libunwind::trace::h812748238d609e46
at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86
1: 0x7f0f95edaffd - backtrace::backtrace::trace_unsynchronized::h7c97e818aebf09c8
at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66
2: 0x7f0f95edaffd - std::sys_common::backtrace::_print_fmt::h60d914263b0ccd71
at src/libstd/sys_common/backtrace.rs:78
3: 0x7f0f95edaffd - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hf78227137afc7565
at src/libstd/sys_common/backtrace.rs:59
4: 0x7f0f95b6524c - core::fmt::write::h543cdf60775f89bf
at src/libcore/fmt/mod.rs:1069
5: 0x7f0f95eda904 - std::io::Write::write_fmt::h0c7f3ce24c679426
at src/libstd/io/mod.rs:1504
6: 0x7f0f95eda105 - std::sys_common::backtrace::_print::h80e55e24be231368
at src/libstd/sys_common/backtrace.rs:62
7: 0x7f0f95eda105 - std::sys_common::backtrace::print::h3b197b9c1261c865
at src/libstd/sys_common/backtrace.rs:49
8: 0x7f0f95eda105 - std::panicking::default_hook::{{closure}}::ha6c807149ce20f8f
at src/libstd/panicking.rs:198
9: 0x7f0f95ed98f4 - std::panicking::default_hook::he49a9c12e358cc45
at src/libstd/panicking.rs:218
10: 0x7f0f95ed93b6 - std::panicking::rust_panic_with_hook::h93f74f5ef2f71f31
at src/libstd/panicking.rs:515
11: 0x7f0f95ed9198 - rust_begin_unwind
at src/libstd/panicking.rs:419
12: 0x7f0f95ed9140 - std::panicking::begin_panic_fmt::hfa6ef29ba81f400e
at src/libstd/panicking.rs:373
13: 0x7f0f95e11671 - <rustup::diskio::threaded::Threaded as rustup::diskio::Executor>::join::habf6ee901a47a8a4
14: 0x7f0f95e10c78 - core::ptr::drop_in_place::h0b1b0dcb4b07c267
15: 0x7f0f95d76c40 - core::ptr::drop_in_place::h09572fbec04e583f
16: 0x7f0f95e2842e - rustup::dist::component::package::unpack_without_first_dir::h99f4b0c2cae349ff
17: 0x7f0f95de559f - rustup::dist::manifestation::Manifestation::update::hacf67fad3b44f03a
18: 0x7f0f95dd563c - rustup::dist::dist::update_from_dist_::h1462627f9c58c494
19: 0x7f0f95dd227a - rustup::install::InstallMethod::install::hbb6430b2dfaf5792
20: 0x7f0f95dd0d21 - rustup::toolchain::DistributableToolchain::install_from_dist::h7b9bf9317c9aa2c5
21: 0x7f0f95ec5aa2 - rustup::cli::self_update::install::h8ca0f61a773526a9
22: 0x7f0f95ecbd3d - rustup::cli::setup_mode::main::h4d335e1871435d70
23: 0x7f0f95adf42a - rustup_init::main::h22da971c634937a2
24: 0x7f0f95ef3e83 - std::rt::lang_start_internal::{{closure}}::{{closure}}::h4ed4ab1fb893cc93
at src/libstd/rt.rs:52
25: 0x7f0f95ef3e83 - std::sys_common::backtrace::__rust_begin_short_backtrace::h1f01c818c00c4f70
at src/libstd/sys_common/backtrace.rs:130
26: 0x7f0f95ae053f - main
27: 0x7f0f956a70b3 - __libc_start_main
28: 0x7f0f95adb029 - <unknown>
thread panicked while panicking. aborting.
Illegal instruction (core dumped)
参考GitHub库rust-lang/rustup的issue #2245：rustup panic with WSLv1 + glibc 2.31，一种办法是将WSL1升级到WSL2：
wsl --set-default-version 2
wsl --list --verbose
wsl --set-version Ubuntu-20.04 2
然后再执行安装命令；另一种办法是在.bashrc或.bash_profile（如果用的Shell是ZSH则在.zshrc）中插入
export RUSTUP_IO_THREADS=1
然后source .zshrc，或直接在命令行中输入该命令执行，然后再执行安装rust命令，即可成功安装：
info: downloading installer
Welcome to Rust!
This will download and install the official compiler for the Rust
programming language, and its package manager, Cargo.
Rustup metadata and toolchains will be installed into the Rustup
home directory, located at:
/home/ayka_tsuzuki/.rustup
This can be modified with the RUSTUP_HOME environment variable.
The Cargo home directory located at:
/home/ayka_tsuzuki/.cargo
This can be modified with the CARGO_HOME environment variable.
The cargo, rustc, rustup and other commands will be added to
Cargo's bin directory, located at:
/home/ayka_tsuzuki/.cargo/bin
This path will then be added to your PATH environment variable by
modifying the profile files located at:
/home/ayka_tsuzuki/.profile
/home/ayka_tsuzuki/.zprofile
You can uninstall at any time with rustup self uninstall and
these changes will be reverted.
Current installation options:
default host triple: x86_64-unknown-linux-gnu
default toolchain: stable (default)
profile: default
modify PATH variable: yes
1) Proceed with installation (default)
2) Customize installation
3) Cancel installation
>1
info: profile set to 'default'
info: default host triple is x86_64-unknown-linux-gnu
info: syncing channel updates for 'stable-x86_64-unknown-linux-gnu'
462.8 KiB / 462.8 KiB (100 %) 416.0 KiB/s in 1s ETA: 0s
info: latest update on 2020-08-03, rust version 1.45.2 (d3fb005a3 2020-07-31)
info: downloading component 'cargo'
info: downloading component 'clippy'
info: downloading component 'rust-docs'
info: downloading component 'rust-std'
info: downloading component 'rustc'
info: downloading component 'rustfmt'
info: installing component 'cargo'
info: Defaulting to 500.0 MiB unpack ram
info: installing component 'clippy'
info: installing component 'rust-docs'
12.2 MiB / 12.2 MiB (100 %) 459.2 KiB/s in 16s ETA: 0s
info: installing component 'rust-std'
15.9 MiB / 15.9 MiB (100 %) 11.8 MiB/s in 1s ETA: 0s
info: installing component 'rustc'
47.1 MiB / 47.1 MiB (100 %) 11.6 MiB/s in 4s ETA: 0s
info: installing component 'rustfmt'
info: default toolchain set to 'stable'
stable installed - rustc 1.45.2 (d3fb005a3 2020-07-31)
【注意：使用Vundle安装vim插件YCM（YouCompleteMe）时需要使用Rust编译安装会自动安装Rust也会出现该问题，也需使用该方法解决】
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