Stream: git-wasmtime

Topic: wasmtime / issue #5551 Error trying running example in We...

Wasmtime GitHub notifications bot (Jan 09 2023 at 17:55):

suchapalaver opened issue #5551:

I tried to run the example found here. The code copied here for convenience:

extern crate wasmtime;
extern crate anyhow;
use wasmtime::*;

fn main() -> anyhow::Result<()> {
      let mut store = Store::<()>::default();
      let wat = r#"
        (module
          (func (export "add") (param i32 i32) (result i32)
            local.get 0
            local.get 1
            i32.add))
      "#;
      let module = Module::new(store.engine(), wat)?;
      let instance = Instance::new(&mut store, &module, &[])?;
      let add = instance.get_typed_func::<(i32, i32), i32>(&mut store, "add")?;
      println!("1 + 2 = {}", add.call(&mut store, (1, 2))?);
      Ok(())
}

Doing so, I get the following error:

Error: failed to parse WebAssembly module

Caused by:
    Invalid input WebAssembly code at offset 0: magic header not detected: bad magic number

Wasmtime GitHub notifications bot (Jan 09 2023 at 17:55):

suchapalaver edited issue #5551:

I tried to run the example found here. Here's the code copied below for convenience:

extern crate wasmtime;
extern crate anyhow;
use wasmtime::*;

fn main() -> anyhow::Result<()> {
      let mut store = Store::<()>::default();
      let wat = r#"
        (module
          (func (export "add") (param i32 i32) (result i32)
            local.get 0
            local.get 1
            i32.add))
      "#;
      let module = Module::new(store.engine(), wat)?;
      let instance = Instance::new(&mut store, &module, &[])?;
      let add = instance.get_typed_func::<(i32, i32), i32>(&mut store, "add")?;
      println!("1 + 2 = {}", add.call(&mut store, (1, 2))?);
      Ok(())
}

Doing so, I get the following error:

Error: failed to parse WebAssembly module

Caused by:
    Invalid input WebAssembly code at offset 0: magic header not detected: bad magic number

Wasmtime GitHub notifications bot (Jan 09 2023 at 17:57):

alexcrichton commented on issue #5551:

The ability to parse the text format is a compile-time feature for Wasmtime. Have you perhaps disabled default features when running this example? If so then the text format will not work and you'll have to make sure the wat feature is enabled.

Wasmtime GitHub notifications bot (Jan 09 2023 at 18:13):

suchapalaver commented on issue #5551:

That was it, thank you! I needed to enable the wat feature. Works now. Thanks again!

Wasmtime GitHub notifications bot (Jan 09 2023 at 18:13):

suchapalaver closed issue #5551:

I tried to run the example found here. Here's the code copied below for convenience:

extern crate wasmtime;
extern crate anyhow;
use wasmtime::*;

fn main() -> anyhow::Result<()> {
      let mut store = Store::<()>::default();
      let wat = r#"
        (module
          (func (export "add") (param i32 i32) (result i32)
            local.get 0
            local.get 1
            i32.add))
      "#;
      let module = Module::new(store.engine(), wat)?;
      let instance = Instance::new(&mut store, &module, &[])?;
      let add = instance.get_typed_func::<(i32, i32), i32>(&mut store, "add")?;
      println!("1 + 2 = {}", add.call(&mut store, (1, 2))?);
      Ok(())
}

Doing so, I get the following error:

Error: failed to parse WebAssembly module

Caused by:
    Invalid input WebAssembly code at offset 0: magic header not detected: bad magic number

Last updated: Dec 23 2024 at 13:07 UTC