Build fails with wasm-bindgen feature in rand crate

[gridbugs]

To reproduce:

cargo build --target=wasm32-unknown-unknown --features=wasm-bindgen

Error:

error[E0463]: can't find crate for `wasm_bindgen`                                                                                                                                                                                                                                
   --> src/lib.rs:729:9                                                                                                                                                                                                                                                          
    |                                                                                                                                                                                                                                                                            
729 |         extern crate wasm_bindgen;                                                                                                                                                                                                                                         
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                                 
error: aborting due to previous error                  

Looks like the rand crate depends on wasm-bindgen (when the appropriate flag/target is set), but this dependency isn't in the manifest.

[dhardy]

I see; the __wbg_shims is in the wrong crate.

[dhardy]

@stevebob would you be able to put together a minimal test crate for rand + wasm-bindgen? Currently we can only test builds. It would be good to add full integration testing, e.g. as a crate under the tests dir.

[gridbugs]

Will do!

[rjgeek]

so far, are there any good solution, I am facing the same issues
Compiling rand_os v0.1.3 error[E0463]: can't find crate for wasm_bindgen --> /home/xxx/cargo/registry/src/git.luolix.top-1ecc6299db9ec823/rand_os-0.1.3/src/lib.rs:138:1 | 138 | extern crate wasm_bindgen; | ^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate@stevebob, @dhardy

[dhardy]

@rjgeek I think a new issue would be appropriate; this one's quite old. When you do, post the output of cargo tree install from here.

[rjgeek]

@dhardy thank you for your kindly response. The output of cargo tree is shown as follows.
It would be nicer if you can give me more guide

➜  service git:(master) ✗ cargo tree
test  v0.1.0 (/home/xxx /service)
├── byteorder v1.3.2
├── failure v0.1.6
│   ├── backtrace v0.3.40
│   │   ├── backtrace-sys v0.1.32
│   │   │   └── libc v0.2.66
│   │   │   [build-dependencies]
│   │   │   └── cc v1.0.48
│   │   ├── cfg-if v0.1.10
│   │   ├── libc v0.2.66 (*)
│   │   └── rustc-demangle v0.1.16
│   └── failure_derive v0.1.6
│       ├── proc-macro2 v1.0.7
│       │   └── unicode-xid v0.2.0
│       ├── quote v1.0.2
│       │   └── proc-macro2 v1.0.7 (*)
│       ├── syn v1.0.13
│       │   ├── proc-macro2 v1.0.7 (*)
│       │   ├── quote v1.0.2 (*)
│       │   └── unicode-xid v0.2.0 (*)
│       └── synstructure v0.12.3
│           ├── proc-macro2 v1.0.7 (*)
│           ├── quote v1.0.2 (*)
│           ├── syn v1.0.13 (*)
│           └── unicode-xid v0.2.0 (*)
├── hex_fmt v0.3.0
├── lazy_static v1.4.0
├── log v0.4.8
│   └── cfg-if v0.1.10 (*)
├── map_vec v0.2.6
│   └── serde v1.0.104
│       └── serde_derive v1.0.104
│           ├── proc-macro2 v1.0.7 (*)
│           ├── quote v1.0.2 (*)
│           └── syn v1.0.13 (*)
│       [dev-dependencies]
│       └── serde_derive v1.0.104 (*)
├── oasis-std v0.2.8
│   ├── blockchain-traits v0.2.3
│   │   └── oasis-types v0.3.1
│   │       ├── anyhow v1.0.26
│   │       ├── derive_more v0.15.0
│   │       │   ├── lazy_static v1.4.0 (*)
│   │       │   ├── proc-macro2 v0.4.30
│   │       │   │   └── unicode-xid v0.1.0
│   │       │   ├── quote v0.6.13
│   │       │   │   └── proc-macro2 v0.4.30 (*)
│   │       │   ├── regex v1.3.1
│   │       │   │   ├── aho-corasick v0.7.6
│   │       │   │   │   └── memchr v2.2.1
│   │       │   │   ├── memchr v2.2.1 (*)
│   │       │   │   ├── regex-syntax v0.6.12
│   │       │   │   └── thread_local v0.3.6
│   │       │   │       └── lazy_static v1.4.0 (*)
│   │       │   └── syn v0.15.44
│   │       │       ├── proc-macro2 v0.4.30 (*)
│   │       │       ├── quote v0.6.13 (*)
│   │       │       └── unicode-xid v0.1.0 (*)
│   │       │   [build-dependencies]
│   │       │   └── rustc_version v0.2.3
│   │       │       └── semver v0.9.0
│   │       │           └── semver-parser v0.7.0
│   │       ├── hex v0.4.0
│   │       └── thiserror v1.0.9
│   │           └── thiserror-impl v1.0.9
│   │               ├── proc-macro2 v1.0.7 (*)
│   │               ├── quote v1.0.2 (*)
│   │               └── syn v1.0.13 (*)
│   ├── cfg-if v0.1.10 (*)
│   ├── failure v0.1.6 (*)
│   ├── oasis-macros v0.2.2
│   │   ├── proc-macro2 v1.0.7 (*)
│   │   ├── quote v1.0.2 (*)
│   │   ├── syn v1.0.13 (*)
│   │   └── tiny-keccak v1.5.0
│   │       └── crunchy v0.2.2
│   ├── oasis-types v0.3.1 (*)
│   ├── serde v1.0.104 (*)
│   ├── serde_cbor v0.10.2
│   │   ├── byteorder v1.3.2 (*)
│   │   ├── half v1.4.0
│   │   └── serde v1.0.104 (*)
│   └── tiny-keccak v1.5.0 (*)
├── pairing v0.14.2
│   ├── byteorder v1.3.2 (*)
│   └── rand v0.4.6
│       └── libc v0.2.66 (*)
├── rand v0.6.5
│   ├── libc v0.2.66 (*)
│   ├── rand_chacha v0.1.1
│   │   └── rand_core v0.3.1
│   │       └── rand_core v0.4.2
│   │   [build-dependencies]
│   │   └── autocfg v0.1.7
│   ├── rand_core v0.4.2 (*)
│   ├── rand_hc v0.1.0
│   │   └── rand_core v0.3.1 (*)
│   ├── rand_isaac v0.1.1
│   │   └── rand_core v0.3.1 (*)
│   ├── rand_jitter v0.1.4
│   │   └── rand_core v0.4.2 (*)
│   ├── rand_os v0.1.3
│   │   ├── libc v0.2.66 (*)
│   │   └── rand_core v0.4.2 (*)
│   ├── rand_pcg v0.1.2
│   │   └── rand_core v0.4.2 (*)
│   │   [build-dependencies]
│   │   └── autocfg v0.1.7 (*)
│   └── rand_xorshift v0.1.1
│       └── rand_core v0.3.1 (*)
│   [build-dependencies]
│   └── autocfg v0.1.7 (*)
├── rand04_compat v0.1.1
│   ├── rand v0.6.5 (*)
│   └── rand04 v0.1.1
│       └── rand v0.4.6 (*)
├── rand_chacha v0.1.1 (*)
├── serde v1.0.104 (*)
├── tiny-keccak v1.5.0 (*)
├── wasm-bindgen v0.2.56
│   ├── cfg-if v0.1.10 (*)
│   └── wasm-bindgen-macro v0.2.56
│       ├── quote v1.0.2 (*)
│       └── wasm-bindgen-macro-support v0.2.56
│           ├── proc-macro2 v1.0.7 (*)
│           ├── quote v1.0.2 (*)
│           ├── syn v1.0.13 (*)
│           ├── wasm-bindgen-backend v0.2.56
│           │   ├── bumpalo v2.6.0
│           │   ├── lazy_static v1.4.0 (*)
│           │   ├── log v0.4.8 (*)
│           │   ├── proc-macro2 v1.0.7 (*)
│           │   ├── quote v1.0.2 (*)
│           │   ├── syn v1.0.13 (*)
│           │   └── wasm-bindgen-shared v0.2.56
│           └── wasm-bindgen-shared v0.2.56 (*)
└── zeroize v1.1.0
[dev-dependencies]
└── oasis-test v0.2.2
    ├── blockchain-traits v0.2.3 (*)
    ├── memchain v0.2.4
    │   ├── blockchain-traits v0.2.3 (*)
    │   └── oasis-types v0.3.1 (*)
    ├── oasis-macros v0.2.2 (*)
    └── oasis-types v0.3.1 (*)

[dhardy]

As I said, a new issue please. It's not the same cause.

Upgrading to Rand 0.7 may fix it; that said we should try to support version 0.6 too.

[rjgeek]

The problem is that I want to use "rand04_compat" package. But "rand04_compat" package does not support Rand 0.7, and I have to back to back to rand 0.6, but rand 0.6 has the above issues. It made me in a dilemma.

[dhardy]

Create a new issue please.

If you can reproduce with a small test crate that would be best.