Spin Apps trap at runtime when build with TinyGo 0.35.0

[ThorstenHans]

I've installed tinygo using Homebrew on my Apple Silicon Mac.

As the tap is not versioned, I recently updated all my installed formulas (including tinygo) which results in me having 0.35.0 right now.

Although I could compile different Spin apps without any error, every app traps at runtime - when receiving incoming HTTP requests - and I receive the following error:

spin build

Building component hello-spin with `tinygo build -target=wasi -gc=leaking -no-debug -o main.wasm main.go`

Finished building all Spin components

demos/hello-spin via 🐹 1.23.4 💫 Spin 3.1.2 took 8s

spin up

Logging component stdio to ".spin/logs/"

Serving http://127.0.0.1:3000
Available Routes:
  hello-spin: http://127.0.0.1:3000 (wildcard)
2025-01-14T18:11:22.335465Z ERROR spin_trigger_http::server: Error processing request: error while executing at wasm backtrace:
    0: 0x2b7d4 - main!canonical_abi_realloc
    1: 0x38a9b - wit-component:adapter:wasi_snapshot_preview1!allocate_stack
    2: 0x35fb7 - wit-component:adapter:wasi_snapshot_preview1!cabi_export_realloc

Caused by:
    wasm trap: wasm `unreachable` instruction executed

Steps to repro

• Install tinygo 0.35.0
• Create a new Spin app (spin new -t http-go -a hello-spin) or take an existing Spin app created using the http-go template (haven't tested other triggers
• Compile the Spin app down to Wasm (spin b)
• Run the Spin app (spin up)
• Send an HTTP request to the Spin app (curl localhost:3000/)
  • curl won't receive anything and the spin process should display an error similar to the one shown above

Workaround

I uninstalled tinygo from my machine and installed tinygo 0.34.0 manually. After recompiling the Spin app with 0.34.0, I was able to successfully invoke the Spin app.

[itowlson]

There is an updated template with an 0.35-friendly build command in the Spin repo. See fermyon/spin#2977 for the changes.

[ThorstenHans]

That's strange, I updated all templates earlier today and was still getting this error. I'll check again tomorrow, however I'm pretty confident that I've updated templates from fermyon/spin as well.

Thanks @itowlson

[itowlson]

You might be on a released build of Spin? In that case it picks up the "stable templates known to work with that version" snapshot; pass --branch main to install/update the canary templates.

[ThorstenHans]

Will try and report back!

[adamreese]

I hit the same error and upgrading the templates fixed it for me. The build command you want is

tinygo build -target=wasip1 -gc=leaking -scheduler=none -buildmode=c-shared -no-debug -o main.wasm .

[adamreese]

Also, I just made the changes in CI for a working example #12

[ThorstenHans]

Updating the build command in templates fixed this for me as well.