Wasm-bindgen: Build error when using workspaces

Created on 8 Sep 2018 · 2Comments · Source: rustwasm/wasm-bindgen

rustc version: rustc 1.30.0-nightly (a8c11d216 2018-09-06)

I'm trying to use wasm-bindgen in an existing project that's a member of a workspace but I run into this error:

cargo build --target wasm32-unknown-unknown --release
   Compiling sass-sys v0.4.7                                                                                                                  
   Compiling wasm-bindgen-macro-support v0.2.21
error[E0277]: the trait bound `&mut syn::Field: quote::ToTokens` is not satisfied
   --> /home/steve/.cargo/registry/src/github.com-1ecc6299db9ec823/wasm-bindgen-macro-support-0.2.21/src/parser.rs:361:44
    |
361 |                 assert_not_variadic(&opts, &field)?;
    |                                            -^^^^^
    |                                            |
    |                                            the trait `quote::ToTokens` is not implemented for `&mut syn::Field`
    |                                            help: consider removing 1 leading `&`-references
    |
    = help: the following implementations were found:
              <syn::Field as quote::ToTokens>
    = note: required for the cast to the object type `dyn quote::ToTokens`

   Compiling sass-rs v0.2.1
error: aborting due to previous error

For more information about this error, try `rustc --explain E0277`.
error: Could not compile `wasm-bindgen-macro-support`.
warning: build failed, waiting for other jobs to finish...
error: build failed

The top-level Cargo.toml looks like:

[workspace]
members = [
    "backend",
    "frontend",
]

The Crate where I use wasm-bindgen looks like:

[lib]

crate-type = ["cdylib"]

[dependencies]

lazy_static = "1.0.2"

failure = "0.1.1"

serde = "1.0.70"

serde_derive = "1.0.70"

capnp = "0.8.17"

wakkave = { path = ".." }

wasm-bindgen = "0.2"

I don't get any errors when using wasm-bindgen in a fresh project.

Source