wasm-pack.exe build hang forever

[patricksuo]

🐛 Bug description

\wasm-game-of-life> wasm-pack.exe build --release
[INFO]: Checking for the Wasm target...
[INFO]: Compiling to Wasm...
warning: function is never used: `set_panic_hook`
 --> src\utils.rs:1:8
  |
1 | pub fn set_panic_hook() {
  |        ^^^^^^^^^^^^^^
  |
  = note: `#[warn(dead_code)]` on by default

warning: 1 warning emitted

    Finished release [optimized] target(s) in 0.05s

the build command never finish

🌍 Your environment

Include the relevant details of your environment. wasm-pack version: 0.9.1

rustc version: rustc 1.46.0 (04488afe3 2020-08-24)

I also tried wasm-pack.exe build -dev, it works as expected.

[shrinktofit]

Also happened to me.

[codepunkt]

Same here, this time in WSL2 Ubuntu 20.04. Running with --dev works, without it, just running wasm-pack --verbose build --target nodejs logs:

[INFO]: Checking for the Wasm target...
[INFO]: Compiling to Wasm...
    Finished release [optimized] target(s) in 0.02s

then hangs indefinitely without exiting and doesn't generate a package.json file.

[ashleygwilliams]

i think this might be due to wasm-opt, gonna tag as a wasm-opt bug, i'm working on a PR that makes wasm-opt opt-in by default. can you try to add this to your Cargo.toml and see if it fixes your issues?

# `wasm-opt` is on by default in for the release profile, but it can be
# disabled by setting it to `false`
[package.metadata.wasm-pack.profile.release]
wasm-opt = false

[patricksuo]

@ashleygwilliams yes, it fixes my issue.

[codepunkt]

comment was a leftover from my other issue. disabling wasm-opt also helps here.

thanks @ashleygwilliams

[d0u9]

Same problem. Hasn't it been fixed?

[rhoit]

still having problems, even with wasm-opt disabled

[HusseinKabbout]

I am also observing this behavior. The weird thing here, is that this only occurs when using a build script and only when trying to build a release build. Using wasm-pack directly in the terminal works without any problems. @ashleygwilliams Any ideas how I might debug this?

[tiby312]

I'm not sure if this is connected, but I had this issue and then increased the disk size of my vm and that fixed the problem. Might be related to running out of disk space?

[drager]

Please try out v0.12.0 from one of the following ways:

• https://github.com/rustwasm/wasm-pack/releases/tag/v0.12.0
• https://crates.io/crates/wasm-pack/0.12.0
• https://www.npmjs.com/package/wasm-pack/v/0.12.0

[winston-wen]

wasm-pack cannot find wasm-opt in $PATH, so it attempts to download one.

By executing RUST_LOG=debug wasm-pack build and strace wasm-pack build, I discovered that wasm-pack is attempting to download https://github.com/WebAssembly/binaryen/releases/download/version_111/binaryen-version_111-x86_64-linux.tar.gz.

Luckily, there is apt install binaryen, which provides wasm-opt command. After installing it, wasm-pack is "satisfied" and won't download anything.