"Rust WASM toolchain not installed, please install it!" error while building substrate-node-template

[paritytech]

"Rust WASM toolchain not installed, please install it!" error while building substrate-node-template

[chrisckwong821]

I encountered similar problem and fixed it by updating rust and target "wasm" to latest nightly build

rustup update
rustup update nightly
rustup target add wasm32-unknown-unknown --toolchain nightly

[danforbes]

Sounds like reverting to nightly-2020-08-23 is a workaround.

[danforbes]

Can you rerun these commands? https://substrate.dev/docs/en/knowledgebase/getting-started/#webassembly-compilation

[taskooh]

Can you rerun these commands? https://substrate.dev/docs/en/knowledgebase/getting-started/#webassembly-compilation

The result was like this. Not solved.

xf9x@TasknoMacBook-Pro substrate-node-template % rustup update nightly
info: syncing channel updates for 'nightly-x86_64-apple-darwin'

  nightly-x86_64-apple-darwin unchanged - rustc 1.48.0-nightly (7402a3944 2020-09-13)

info: checking for self-updates
xf9x@TasknoMacBook-Pro substrate-node-template % rustup target add wasm32-unknown-unknown --toolchain nightly


info: component 'rust-std' for target 'wasm32-unknown-unknown' is up to date
xf9x@TasknoMacBook-Pro substrate-node-template % rustup update


info: syncing channel updates for 'stable-x86_64-apple-darwin'
info: syncing channel updates for 'nightly-x86_64-apple-darwin'
info: checking for self-updates

   stable-x86_64-apple-darwin unchanged - rustc 1.46.0 (04488afe3 2020-08-24)
  nightly-x86_64-apple-darwin unchanged - rustc 1.48.0-nightly (7402a3944 2020-09-13)

info: cleaning up downloads & tmp directories
xf9x@TasknoMacBook-Pro substrate-node-template % cargo build --release
   Compiling node-template-runtime v2.0.0-rc6 (/Users/xf9x/Documents/github/substrate-node-template/runtime)
   Compiling frame-support-procedural-tools-derive v2.0.0-rc6 (https://github.com/paritytech/substrate.git?tag=v2.0.0-rc6#be8bb186)
   Compiling slog_derive v0.2.0
   Compiling async-trait v0.1.38
   Compiling serde v1.0.114
   Compiling pin-project v0.4.23
   Compiling tracing v0.1.19
   Compiling ref-cast v1.0.2
   Compiling rental v0.5.5
   Compiling prost v0.6.1
   Compiling dyn-clonable v0.9.0
   Compiling thiserror v1.0.20
error: failed to run custom build command for `node-template-runtime v2.0.0-rc6 (/Users/xf9x/Documents/github/substrate-node-template/runtime)`

Caused by:
  process didn't exit successfully: `/Users/xf9x/Documents/github/substrate-node-template/target/release/build/node-template-runtime-833ee7d7fff70513/build-script-build` (exit code: 1)
  --- stderr
     Compiling wasm-build-runner-impl v1.0.0 (/Users/xf9x/Documents/github/substrate-node-template/target/release/wbuild-runner/node-template-runtime17855005755133324358)
      Finished release [optimized] target(s) in 0.46s
       Running `/Users/xf9x/Documents/github/substrate-node-template/target/release/wbuild-runner/node-template-runtime17855005755133324358/target/x86_64-apple-darwin/release/wasm-build-runner-impl`
  Rust WASM toolchain not installed, please install it!
warning: build failed, waiting for other jobs to finish...
error: build failed

[danforbes]

Thank you - unfortunately I do not have access to a Mac so it will be difficult for me to help debug much.

[taskooh]

Thank you - unfortunately I do not have access to a Mac so it will be difficult for me to help debug much.

All right, thank you for your help!

[taskooh]

Probably this issue is happening only in the latest rustup version. So, I hope you to try on latest rustup (v1.22.1)

[danforbes]

Yes, that is what I am using. @bkchr did you find that this is an upstream bug in the Rust compiler? Do we know what people need to switch to in order to fix this problem?

~: rustup --version
rustup 1.22.1 (b01adbbc3 2020-07-08)

[danforbes]

Basti linked this as a related Issue rust-lang/rust#76698

[PatrickHuang888]

I encountered similar problem and fixed it by updating rust and target "wasm" to latest nightly build

rustup update
rustup update nightly
rustup target add wasm32-unknown-unknown --toolchain nightly

I have same problem on rust 1.68.2, and ubuntu 22.04. solved it by this. but have problem of "cannot deserialize module: UnknownOpcode(192)" when startup, solved it by downgraded to 1.68.0

[bkchr]

cannot deserialize module: UnknownOpcode(192)

Will be fixed by: paritytech/substrate#13804