Exported functions no longer visible in JS

[viktorku]

Hi there!

I think I've hit a regression in the latest 0.2.14 release as I basically can't call any exported function from JS into Rust anymore.

Here's the module on 0.2.13:

notice my init and start export and all the boilerplate DOM API imports I've defined.

and here it is on 0.2.14:

The code is exactly the same, and pretty much as in the basic tutorial :/

Is there something I need to do to make this work?

Thanks for all the great work BTW!

[EDIT]: Here's the code: https://github.com/viktorku/kunovski/blob/master/src/lib.rs

[alexcrichton]

Thanks for the report! @viktorku what version of the wasm-bindgen CLI tool do you have installed? You may need to update it to 0.2.14 as well I think

[viktorku]

It seems it's resolved in 0.2.15 ;)

$ cargo update
    Updating registry `https://github.com/rust-lang/crates.io-index`
    Updating wasm-bindgen v0.2.13 -> v0.2.15
    Updating wasm-bindgen-backend v0.2.13 -> v0.2.15
    Updating wasm-bindgen-macro v0.2.13 -> v0.2.15
    Updating wasm-bindgen-shared v0.2.13 -> v0.2.15
$ ./build
 Downloading wasm-bindgen v0.2.15
 Downloading wasm-bindgen-macro v0.2.15
 Downloading wasm-bindgen-shared v0.2.15
 Downloading wasm-bindgen-backend v0.2.15
   Compiling wasm-bindgen-shared v0.2.15
   Compiling wasm-bindgen-backend v0.2.15
   Compiling wasm-bindgen-macro v0.2.15
   Compiling wasm-bindgen v0.2.15
   Compiling kunovski v0.1.0 (file:///Users/viktor/projects/kunovski)
    Finished release [optimized] target(s) in 19.13s

If I downgrade to 0.2.14:

$ cargo update -p wasm-bindgen --precise 0.2.14
    Updating registry `https://github.com/rust-lang/crates.io-index`
    Updating wasm-bindgen v0.2.15 -> v0.2.14
    Updating wasm-bindgen-backend v0.2.15 -> v0.2.14
    Updating wasm-bindgen-macro v0.2.15 -> v0.2.14
    Updating wasm-bindgen-shared v0.2.15 -> v0.2.14
$ ./build
   Compiling wasm-bindgen-shared v0.2.14
   Compiling wasm-bindgen-backend v0.2.14
   Compiling wasm-bindgen-macro v0.2.14
   Compiling wasm-bindgen v0.2.14
   Compiling kunovski v0.1.0 (file:///Users/viktor/projects/kunovski)
    Finished release [optimized] target(s) in 18.79s

My wasm-bindgen-cli was at 0.2.12 tho, so you're right. But that version works good with wasm-bindgen at 0.2.15...

[viktorku]

This probably deserves a separate issue, but when I try to upgrade wasm-bindgen-cli I always get this compilation error. When I did upgrade it to 0.2.12 last week, I had to clone and build tempfile from source (I thought that was failing upstream for some reason), and only when I built it successfully, I was able to upgrade wasm-bindgen-cli. Very weird. Is this some intricate bug in the dependency resolution of cargo?

$ cargo +nightly install wasm-bindgen-cli --force
    Updating registry `https://github.com/rust-lang/crates.io-index`
  Installing wasm-bindgen-cli v0.2.15
 Downloading wasm-bindgen-cli-support v0.2.15
 Downloading wasm-gc-api v0.1.9
   Compiling unicode-xid v0.0.4
   Compiling unicode-xid v0.1.0
   Compiling quote v0.3.15
   Compiling serde v1.0.70
   Compiling void v1.0.2
   Compiling libc v0.2.42
   Compiling rustc-demangle v0.1.9
   Compiling ucd-util v0.1.1
   Compiling lazy_static v1.0.2
   Compiling rand_core v0.2.1
   Compiling regex v1.0.2
   Compiling cfg-if v0.1.4
   Compiling wasm-bindgen-shared v0.2.15
   Compiling byteorder v1.2.3
   Compiling itoa v0.4.2
   Compiling safemem v0.2.0
   Compiling utf8-ranges v1.0.0
   Compiling nan-preserving-float v0.1.0
   Compiling memory_units v0.3.0
   Compiling remove_dir_all v0.5.1
   Compiling dtoa v0.4.3
   Compiling strsim v0.7.0
   Compiling unreachable v1.0.0
   Compiling memchr v2.0.1
   Compiling proc-macro2 v0.4.9
   Compiling synom v0.11.3
   Compiling log v0.4.3
   Compiling regex-syntax v0.6.2
   Compiling rand v0.5.4
   Compiling parity-wasm v0.31.1
   Compiling base64 v0.9.2
   Compiling thread_local v0.3.5
   Compiling aho-corasick v0.6.6
   Compiling backtrace v0.3.9
   Compiling syn v0.11.11
   Compiling tempfile v3.0.3
error[E0425]: cannot find function `create` in module `imp`
  --> /Users/viktor/.cargo/registry/src/github.com-1ecc6299db9ec823/tempfile-3.0.3/src/file/mod.rs:98:10
   |
98 |     imp::create(dir.as_ref())
   |          ^^^^^^ not found in `imp`
help: possible candidate is found in another module, you can import it into scope
   |
1  | use dir::create;
   |

error[E0425]: cannot find function `persist` in module `imp`
   --> /Users/viktor/.cargo/registry/src/github.com-1ecc6299db9ec823/tempfile-3.0.3/src/file/mod.rs:234:20
    |
234 |         match imp::persist(&self.path, new_path.as_ref(), true) {
    |                    ^^^^^^^ not found in `imp`

error[E0425]: cannot find function `persist` in module `imp`
   --> /Users/viktor/.cargo/registry/src/github.com-1ecc6299db9ec823/tempfile-3.0.3/src/file/mod.rs:297:20
    |
297 |         match imp::persist(&self.path, new_path.as_ref(), false) {
    |                    ^^^^^^^ not found in `imp`

error[E0425]: cannot find function `reopen` in module `imp`
   --> /Users/viktor/.cargo/registry/src/github.com-1ecc6299db9ec823/tempfile-3.0.3/src/file/mod.rs:707:14
    |
707 |         imp::reopen(self.as_file(), NamedTempFile::path(self))
    |              ^^^^^^ not found in `imp`

error[E0425]: cannot find function `create_named` in module `imp`
   --> /Users/viktor/.cargo/registry/src/github.com-1ecc6299db9ec823/tempfile-3.0.3/src/file/mod.rs:798:10
    |
798 |     imp::create_named(&path).map(|file| NamedTempFile {
    |          ^^^^^^^^^^^^ not found in `imp`
help: possible candidate is found in another module, you can import it into scope
    |
1   | use file::create_named;
    |

error: aborting due to 5 previous errors

For more information about this error, try `rustc --explain E0425`.
error: Could not compile `tempfile`.
warning: build failed, waiting for other jobs to finish...
error: failed to compile `wasm-bindgen-cli v0.2.15`, intermediate artifacts can be found at `/var/folders/dp/h6rhdfds7ss6sfm7yjngvh800000gn/T/cargo-install7D5KJt`

Caused by:
  build failed

[richard-uk1]

98 |     imp::create(dir.as_ref())
   |          ^^^^^^ not found in `imp`

I haven't looked at the code, but imp normally indicates different implementations for different platforms. What platform are you compiling on?

e.g. it could be trying to compile the cli on wasm32-unknown-unknown when it should be on host platform.

[alexcrichton]

Ok thanks for the info @viktorku! In that case I think I'm going to close this.

I also think for that build failure @derekdreery hit the nail on the head, you're likely running into rust-lang/cargo#2507 where .cargo/config mentions the default target is wasm perhaps?