📝 caveat when upgrading to worker 0.0.18

[vikiival]

Context

We (@kodadot) are huge fans of Cloudflare and Workers and we have a ton of workers in the prod (Rust / TS).

As anyone would upgrade to latest version they would meet this very scary error

[INFO]: 🌀  Compiling to Wasm...
   Compiling proc-macro2 v1.0.67
   Compiling phf_shared v0.11.1
   Compiling serde v1.0.164
   Compiling syn v1.0.109
   Compiling unicode-normalization v0.1.22
   Compiling mio v0.8.8
   Compiling matchit v0.4.6
error[E0432]: unresolved import `crate::sys::IoSourceState`

The only mention I found was in Cloudlfare's discord

[kflansburg]

It might make sense to note that we require 2021 edition at the top as well, but this looks good for now

[joelawm]

@kflansburg I believe this advice may be outdated or not clear enough

name = "backend"
main = "build/worker/shim.mjs"
compatibility_date = "2024-05-22"


[build]
command = "cargo install -q worker-build && worker-build --release"

[package]
edition = "2021"

This errors with "Additional properties are not allowed ('package' was unexpected)" and does nothing to remedy the original problem. Any help would be amazing!

[avsaase]

Your Cargo.toml is not valid. Change it to this:

[package]
name = "backend"
main = "build/worker/shim.mjs"
compatibility_date = "2024-05-22"
edition = "2021"

[build]
command = "cargo install -q worker-build && worker-build --release"

[joelawm]

@avsaase The original PR says wrangler.toml

In this case, upgrade package.edition to edition = "2021" in wrangler.toml

My cargo.toml has this and its not compiling mio with same error set as above. We may need to reopen this or create a new thread unless im still missing something.

[avsaase]

That can't be correct. My example isn't either though. The edition field should be added to the [package] section of your Cargo.toml file.

[joelawm]

Here is my projects Toml file.

[package]
name = "backend"
version = "0.1.0"
edition = "2021"
authors = [ "Joe Meyer <joemeyer@lavabit.com>" ]

[package.metadata.release]
release = false

# https://github.com/rustwasm/wasm-pack/issues/1247
[package.metadata.wasm-pack.profile.release]
wasm-opt = false

[lib]
crate-type = ["cdylib"]

[dependencies]
worker = { version="0.3.0", features=['http', 'axum'] }
worker-macros = { version="0.3.0", features=['http'] }
axum  = { version = "0.7" }
tower-service = "0.3.2"
console_error_panic_hook = { version = "0.1.1" }
tracing = "0.1.37"
serde_derive = "1.0.174"
serde = { version = "1.0.174", features = ["derive"]}
lazy_static = "1.4.0"
email = {path = "../email"}

I also have resolver = "2" set in the Cargo.toml workspace which some other issues related have suggesed.

Resuts in

error: the wasm*-unknown-unknown targets are not supported by default, you may need to enable the "js" feature. For more information see: https://docs.rs/getrandom/#webassembly-support
   --> /Users/deltagi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/getrandom-0.2.15/src/lib.rs:342:9
    |
342 | /         compile_error!("the wasm*-unknown-unknown targets are not supported by \
343 | |                         default, you may need to enable the \"js\" feature. \
344 | |                         For more information see: \
345 | |                         https://docs.rs/getrandom/#webassembly-support");
    | |________________________________________________________________________^

error[E0432]: unresolved import `crate::sys::IoSourceState`
  --> /Users/deltagi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-0.8.11/src/io_source.rs:12:5
   |
12 | use crate::sys::IoSourceState;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^ no `IoSourceState` in `sys`

error[E0432]: unresolved import `crate::sys::tcp`
  --> /Users/deltagi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-0.8.11/src/net/tcp/listener.rs:15:17
   |
15 | use crate::sys::tcp::{bind, listen, new_for_addr};
   |                 ^^^ could not find `tcp` in `sys`

error[E0432]: unresolved import `crate::sys::tcp`
  --> /Users/deltagi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-0.8.11/src/net/tcp/stream.rs:13:17
   |
13 | use crate::sys::tcp::{connect, new_for_addr};
   |                 ^^^ could not find `tcp` in `sys`

error[E0433]: failed to resolve: could not find `Selector` in `sys`
   --> /Users/deltagi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-0.8.11/src/poll.rs:312:18
    |
312 |             sys::Selector::new().map(|selector| Poll {
    |                  ^^^^^^^^ could not find `Selector` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
  --> /Users/deltagi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-0.8.11/src/event/event.rs:24:14
   |
24 |         sys::event::token(&self.inner)
   |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
  --> /Users/deltagi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-0.8.11/src/event/event.rs:38:14
   |
38 |         sys::event::is_readable(&self.inner)
   |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
  --> /Users/deltagi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-0.8.11/src/event/event.rs:43:14
   |
43 |         sys::event::is_writable(&self.inner)
   |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
  --> /Users/deltagi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-0.8.11/src/event/event.rs:68:14
   |
68 |         sys::event::is_error(&self.inner)
   |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
  --> /Users/deltagi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-0.8.11/src/event/event.rs:99:14
   |
99 |         sys::event::is_read_closed(&self.inner)
   |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
   --> /Users/deltagi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-0.8.11/src/event/event.rs:129:14
    |
129 |         sys::event::is_write_closed(&self.inner)
    |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
   --> /Users/deltagi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-0.8.11/src/event/event.rs:151:14
    |
151 |         sys::event::is_priority(&self.inner)
    |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
   --> /Users/deltagi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-0.8.11/src/event/event.rs:173:14
    |
173 |         sys::event::is_aio(&self.inner)
    |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
   --> /Users/deltagi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-0.8.11/src/event/event.rs:183:14
    |
183 |         sys::event::is_lio(&self.inner)
    |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
   --> /Users/deltagi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-0.8.11/src/event/event.rs:221:26
    |
221 |                     sys::event::debug_details(f, self.0)
    |                          ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `tcp` in `sys`
   --> /Users/deltagi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-0.8.11/src/net/tcp/listener.rs:103:18
    |
103 |             sys::tcp::accept(inner).map(|(stream, addr)| (TcpStream::from_std(stream), addr))
    |                  ^^^ could not find `tcp` in `sys`

error[E0433]: failed to resolve: could not find `udp` in `sys`
   --> /Users/deltagi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-0.8.11/src/net/udp.rs:122:14
    |
122 |         sys::udp::bind(addr).map(UdpSocket::from_std)
    |              ^^^ could not find `udp` in `sys`

error[E0433]: failed to resolve: could not find `udp` in `sys`
   --> /Users/deltagi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-0.8.11/src/net/udp.rs:544:14
    |
544 |         sys::udp::only_v6(&self.inner)
    |              ^^^ could not find `udp` in `sys`

error[E0412]: cannot find type `Selector` in module `sys`
   --> /Users/deltagi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-0.8.11/src/poll.rs:263:20
    |
263 |     selector: sys::Selector,
    |                    ^^^^^^^^ not found in `sys`

error[E0412]: cannot find type `Selector` in module `sys`
   --> /Users/deltagi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-0.8.11/src/poll.rs:710:44
    |
710 |     pub(crate) fn selector(&self) -> &sys::Selector {
    |                                            ^^^^^^^^ not found in `sys`

error[E0412]: cannot find type `Waker` in module `sys`
  --> /Users/deltagi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/mio-0.8.11/src/waker.rs:79:17
   |
79 |     inner: sys::Waker,
   |                 ^^^^^ not found in `sys`
   |
help: consider importing one of these items
   |
1  + use core::task::Waker;
   |
1  + use crate::Waker;
   |
1  + use std::task::Waker;
   |
help: if you import `Waker`, refer to it directly
   |
79 -     inner: sys::Waker,
79 +     inner: Waker,
......

[avsaase]

I suspect axum pulls in tokio which doesn't compile to wasm. Try changing your dependency to

axum  = { version = "0.7", default-features = false }

You may need to manually re-enable some of the features listed here.

[joelawm]

@avsaase thank you that fixed the problem, though I was still having issues with socket2 haha, I'll have to end up going to a non wasm solution unfortunately thank you for the help!