Stream: general

Topic: error: struct indexed types not supported

Talin (Dec 16 2024 at 02:56):

Hi, I'm attempting to use the "gc" feature in wasmtime, and I get the following error whenever I attempt to add a "struct" type into my module:

struct indexed types not supported without the gc feature (at offset 0x40)

I have the "gc" and "gc-drc" features enabled in Cargo.toml. My module is pretty minimal; if I remove the struct type definition, the error does not happen.

(module $hello.saga
  (type $String (;0;) (struct (field i32)))
  (type $hello.type (;1;) (func (result i32)))
  (export "hello" (func $hello))
  (func $hello (;0;) (type $hello.type) (result i32)
    i32.const 1
    i32.const 2
    i32.add
    i32.const 3
    i32.add
    return
  )
)

Any ideas what I might be doing wrong?

Pat Hickey (Dec 16 2024 at 03:26):

The cargo feature allows support for those to be compiled into wasmtime, but you also have to enable those features in the Config you create your Engine from.

Last updated: Dec 23 2024 at 12:05 UTC