multiple matching crates for `lazy_static` when trying to compile `tracing-core` #51

evanjs · 2019-11-24T19:14:55Z

Now that #37 has been fixed, I am able to get a little further with compiling my project using crate2nix.

When attempting to build, I encounter an error with multiple matching crates for lazy_static.

rust_tracing-core> error[E0464]: multiple matching crates for `lazy_static`
rust_tracing-core>   --> src/lib.rs:78:1
rust_tracing-core>    |
rust_tracing-core> 78 | extern crate lazy_static;
rust_tracing-core>    | ^^^^^^^^^^^^^^^^^^^^^^^^^
rust_tracing-core>    |
rust_tracing-core>    = note: candidates:
rust_tracing-core>            crate `lazy_static`: /nix/store/jql33z8cm1pssd1m70qd4d0bzb925f1w-rustc-1.37.0/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblazy_static-e27d2cebc85340fe.rlib
rust_tracing-core>            crate `lazy_static`: /nix/store/jql33z8cm1pssd1m70qd4d0bzb925f1w-rustc-1.37.0/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblazy_static-1a8d3023d6646c0e.rlib
rust_tracing-core> error[E0463]: can't find crate for `lazy_static`
rust_tracing-core>   --> src/lib.rs:78:1
rust_tracing-core>    |
rust_tracing-core> 78 | extern crate lazy_static;
rust_tracing-core>    | ^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
rust_tracing-core> error: aborting due to 2 previous errors
rust_tracing-core> For more information about this error, try `rustc --explain E0463`.
builder for '/nix/store/jkggrifvxjq57x215grk7p0khrmvyg1q-rust_tracing-core-0.1.7.drv' failed with exit code 1; last 10 log lines:
  
  error[E0463]: can't find crate for `lazy_static`
    --> src/lib.rs:78:1
     |
  78 | extern crate lazy_static;
     | ^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
  
  error: aborting due to 2 previous errors

nix-info -m

system: "x86_64-linux"
host os: Linux 5.3.11, NixOS, 19.09.1300.08e503bac6d (Loris)
multi-user?: yes
sandbox: yes
version: nix-env (Nix) 2.3
channels(root): "nixos-19.09.1300.08e503bac6d"
channels(evanjs): ""
nixpkgs: /nix/var/nix/profiles/per-user/root/channels/nixos
crate2nix version: crate2nix 0.6.0 (installed from master)

Happy to provide any other information that might help.

The text was updated successfully, but these errors were encountered:

cpcloud · 2019-11-24T20:21:16Z

@kolloch This is the problem I reference in the FIXME here.

kolloch · 2019-11-24T21:14:53Z

Thank you. I could reproduce this problem but have trouble understanding why this happens.

I would expect two flags of similar to --extern lazy_static=/nix/store/d08mk7m3j57kadk1vykjvmdc0sjmsf4d-rust_lazy_static-1.4.0/lib/liblazy_static-28e1bf1896.rlib to be specified when building it. Instead, I do not see any and wonder how it picks up two of them.

kolloch · 2019-11-24T21:18:45Z

Ah, okay, we might need to filter duplicate ones in filterDependencies.

kolloch · 2019-11-24T21:48:26Z

If you have some time, I'd love a minimal reproducible example for this.

I could reproduce this before with the "with_problematic_crates" example when using "tracing" with default features. See #51 (comment)

Now, I cannot reproduce it anymore. Can you?

I'd love a minimal project example which has only a small number of dependencies.

I suspect that my nixpkgs update fixed it.

evanjs · 2019-11-25T00:43:49Z

I was actually able to reproduce by only adding tracing_core an otherwise empty new project.
With ffc06fd, I can't seem to reproduce anymore.

Another error popped up, though...
Seems similar to #4 and #5:

rust_crate2nix> Running rustc --crate-name build_script_build build.rs --crate-type bin -C opt-level=3 -C codegen-units=8 --edition 2018 --cfg feature="default" --out-dir target/build/crate2nix-51 --emit=dep-info,link -L dependency=target/buildDeps --cap-lints allow -L native=/nix/store/y2irx4ldvz8c6823skr37rw8ywidwz2a-dbus-1.12.16-lib/lib -l dbus-1 --color always
rust_crate2nix> error[E0432]: unresolved import `dbus_codegen`
rust_crate2nix>  --> build.rs:3:5
rust_crate2nix>   |
rust_crate2nix> 3 | use dbus_codegen;
rust_crate2nix>   |     ^^^^^^^^^^^^ no `dbus_codegen` external crate
rust_crate2nix> error: aborting due to previous error
rust_crate2nix> For more information about this error, try `rustc --explain E0432`.
builder for '/nix/store/7hlx61n1dxgjbimb3hwq9v911li9iw0l-rust_crate2nix-51-0.1.0.drv' failed with exit code 1; last 10 log lines:
  Running rustc --crate-name build_script_build build.rs --crate-type bin -C opt-level=3 -C codegen-units=8 --edition 2018 --cfg feature="default" --out-dir target/build/crate2nix-51 --emit=dep-info,link -L dependency=target/buildDeps --cap-lints allow -L native=/nix/store/y2irx4ldvz8c6823skr37rw8ywidwz2a-dbus-1.12.16-lib/lib -l dbus-1 --color always
  error[E0432]: unresolved import `dbus_codegen`
   --> build.rs:3:5
    |
  3 | use dbus_codegen;
    |     ^^^^^^^^^^^^ no `dbus_codegen` external crate
  
  error: aborting due to previous error
  
  For more information about this error, try `rustc --explain E0432`.

I can open another issue for that 😛

In any case, this particular issue with lazy_static and tracing_core seems to be resolved.

kolloch · 2019-11-25T08:35:13Z

Thank you for testing!

I think that noDefaultFeatures/default-features=false is broken and therefore the error case is not triggered anymore. Keeping this open until that is resolved :(

For dbus_codegen, I do not see any extern parameter. Something is quite wrong :( Could you please create another bug with a reproducing repro? I would be appreciated...

kolloch · 2019-11-27T22:18:28Z

So this builds but I think that the dependency with the more specific target should probably override the features of the general dependency. crate2nix will currently merge their feature sets.

kolloch · 2020-03-16T18:31:19Z

Let's reopen if this becomes a concrete problem again.

bbigras · 2020-05-28T17:01:30Z

I have a similar problem. Tell me if you want me to open a new issue:

Cargo.toml

futures = { version = "0.3", default-features = false, features = ["compat"] }
futures01 = { package = "futures", version = "0.1" }

main.rs

use futures01::future::IntoFuture;

fn something(
) -> impl futures01::Future<Item = (), Error = std::io::Error> {
    Ok(()).into_future()
}

fn main() {
    println!("Hello, world!");
}

log

error[E0465]: multiple rlib candidates for `futures01` found
 --> src/main.rs:1:5
  |
1 | use futures01::future::IntoFuture;
  |     ^^^^^^^^^
  |
note: candidate #1: /nix/store/jwjxndqbg3jncs0fp3jdw5gxn06bdwfm-rust_futures-0.3.5-lib/lib/libfutures-a0288b50d7.rlib
 --> src/main.rs:1:5
  |
1 | use futures01::future::IntoFuture;
  |     ^^^^^^^^^
note: candidate #2: /nix/store/bikk5jmdrkj84lhwnbvdvld29g7awc8k-rust_futures-0.1.29-lib/lib/libfutures-935dbfd7d6.rlib
 --> src/main.rs:1:5
  |
1 | use futures01::future::IntoFuture;
  |     ^^^^^^^^^

error[E0463]: can't find crate for `futures01`
 --> src/main.rs:1:5
  |
1 | use futures01::future::IntoFuture;
  |     ^^^^^^^^^ can't find crate

kolloch · 2020-05-28T21:31:05Z

That looks like this issue.

Do you use nixpks-unstable?

Can you include the rustc command lines?

bbigras · 2020-05-28T21:57:12Z

Do you use nixpks-unstable?

Yes

Can you include the rustc command lines?

Do you mean the full build log like this:

these derivations will be built:
  /nix/store/q6xrcw6srxkdkxpqyd9f1cxzfj6rdj7y-rust_test-crate2nix-0.1.0.drv
  /nix/store/cwrfdph4g7ps653yfgf9mb6n9xdxaynp-all-workspace-members.drv
building '/nix/store/q6xrcw6srxkdkxpqyd9f1cxzfj6rdj7y-rust_test-crate2nix-0.1.0.drv'...
unpacking sources
unpacking source archive /nix/store/d3nqc9v4113kmpkkgj0pbvar7zkvq3c9-source
source root is source
patching sources
configuring
Running cd .
building
Building test-crate2nix (src/main.rs)
Running rustc --crate-name test_crate2nix src/main.rs --crate-type bin -C opt-level=3 -C codegen-units=4 --remap-path-prefix=/build=/ --extern futures01=/nix/store/bikk5jmdrkj84lhwnbvdvld29g7awc8k-rust_futures-0.1.29-lib/lib/libfutures-935dbfd7d6.rlib --extern futures01=/nix/store/jwjxndqbg3jncs0fp3jdw5gxn06bdwfm-rust_futures-0.3.5-lib/lib/libfutures-a0288b50d7.rlib --cfg feature="default" --edition 2018 --out-dir target/bin -L dependency=target/deps --cap-lints allow --color always
error[E0465]: multiple rlib candidates for `futures01` found
 --> src/main.rs:1:5
  |
1 | use futures01::future::IntoFuture;
  |     ^^^^^^^^^
  |
note: candidate #1: /nix/store/jwjxndqbg3jncs0fp3jdw5gxn06bdwfm-rust_futures-0.3.5-lib/lib/libfutures-a0288b50d7.rlib
 --> src/main.rs:1:5
  |
1 | use futures01::future::IntoFuture;
  |     ^^^^^^^^^
note: candidate #2: /nix/store/bikk5jmdrkj84lhwnbvdvld29g7awc8k-rust_futures-0.1.29-lib/lib/libfutures-935dbfd7d6.rlib
 --> src/main.rs:1:5
  |
1 | use futures01::future::IntoFuture;
  |     ^^^^^^^^^

error[E0463]: can't find crate for `futures01`
 --> src/main.rs:1:5
  |
1 | use futures01::future::IntoFuture;
  |     ^^^^^^^^^ can't find crate

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0463`.
builder for '/nix/store/q6xrcw6srxkdkxpqyd9f1cxzfj6rdj7y-rust_test-crate2nix-0.1.0.drv' failed with exit code 1
cannot build derivation '/nix/store/cwrfdph4g7ps653yfgf9mb6n9xdxaynp-all-workspace-members.drv': 1 dependencies couldn't be built
error: build of '/nix/store/cwrfdph4g7ps653yfgf9mb6n9xdxaynp-all-workspace-members.drv' failed

kolloch · 2020-05-29T09:22:47Z

This is an instance of #83.

The generated command line is definitely wrong:

Running rustc --crate-name test_crate2nix src/main.rs --crate-type bin -C opt-level=3 -C codegen-units=4 --remap-path-prefix=/build=/ --extern futures01=/nix/store/bikk5jmdrkj84lhwnbvdvld29g7awc8k-rust_futures-0.1.29-lib/lib/libfutures-935dbfd7d6.rlib --extern futures01=/nix/store/jwjxndqbg3jncs0fp3jdw5gxn06bdwfm-rust_futures-0.3.5-lib/lib/libfutures-a0288b50d7.rlib --cfg feature="default" --edition 2018 --out-dir target/bin -L dependency=target/deps --cap-lints allow --color always

There is a regression test that is very similar, so I suspect you are not using a recent crate2nix (from master) version or not an updated nixpkgs-unstable version. Try updating both. You need this PR.

bbigras · 2020-05-29T14:25:07Z

I should be up-to-date now and I still have the problem:

I don't have to use -n '<nixos-unstable>' right? Since I'm on unstable and I don't have the stable channel.

crate2nix 0.9.0-alpha.1

system: "x86_64-linux"
host os: Linux 5.4.42, NixOS, 20.09pre227294.46f975f81e0 (Nightingale)
multi-user?: yes
sandbox: yes
version: nix-env (Nix) 2.3.4
channels(bbigras): "home-manager, unstable-20.09pre227294.46f975f81e0"
channels(root): "nixos-20.09pre227294.46f975f81e0, nixos-hardware"
nixpkgs: /nix/var/nix/profiles/per-user/root/channels/nixos

crate2nix generate
nix-build Cargo.nix

[...]

Running rustc --crate-name test_crate2nix src/main.rs --crate-type bin -C opt-level=3 -C codegen-units=4 --remap-path-prefix=/build=/ --extern futures01=/nix/store/psw2biiczndm4jlifxjbjhpiksqsl1fr-rust_futures-0.1.29-lib/lib/libfutures-935dbfd7d6.rlib --extern futures01=/nix/store/lpz991aqha42z48s7hvp1sa4ykss25vv-rust_futures-0.3.5-lib/lib/libfutures-a0288b50d7.rlib --cfg feature="default" --edition 2018 --out-dir target/bin -L dependency=target/deps --cap-lints allow --color always
error[E0465]: multiple rlib candidates for `futures01` found
 --> src/main.rs:1:5
  |
1 | use futures01::future::IntoFuture;
  |     ^^^^^^^^^
  |
note: candidate #1: /nix/store/psw2biiczndm4jlifxjbjhpiksqsl1fr-rust_futures-0.1.29-lib/lib/libfutures-935dbfd7d6.rlib
 --> src/main.rs:1:5
  |
1 | use futures01::future::IntoFuture;
  |     ^^^^^^^^^
note: candidate #2: /nix/store/lpz991aqha42z48s7hvp1sa4ykss25vv-rust_futures-0.3.5-lib/lib/libfutures-a0288b50d7.rlib
 --> src/main.rs:1:5
  |
1 | use futures01::future::IntoFuture;
  |     ^^^^^^^^^

error[E0463]: can't find crate for `futures01`
 --> src/main.rs:1:5
  |
1 | use futures01::future::IntoFuture;
  |     ^^^^^^^^^ can't find crate

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0463`.
builder for '/nix/store/93zgwwc57p5dd9398rpz2i3nmqyb1v4a-rust_test-crate2nix-0.1.0.drv' failed with exit code 1
cannot build derivation '/nix/store/ny4ssg0dnr282rpa1yv2qmpjws9lpafb-all-workspace-members.drv': 1 dependencies couldn't be built
error: build of '/nix/store/ny4ssg0dnr282rpa1yv2qmpjws9lpafb-all-workspace-members.drv' failed

kolloch · 2020-05-29T14:58:41Z

Sorry, you are right! I didn't push the fix. Sorry for that. It should be pushed now and work for you. Thanks for your insistance.

kolloch added help wanted Extra attention is needed bug Something isn't working labels Nov 24, 2019

cpcloud referenced this issue Nov 24, 2019

Use tracing with default features because it works

ffc06fd

evanjs mentioned this issue Nov 25, 2019

dbus_codegen: extern location for dbus_codegen does not exist #53

Closed

kolloch closed this as completed Mar 16, 2020

kolloch mentioned this issue May 29, 2020

can't build futures_util in some cases #83

Closed

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multiple matching crates for `lazy_static` when trying to compile `tracing-core` #51

multiple matching crates for `lazy_static` when trying to compile `tracing-core` #51

evanjs commented Nov 24, 2019

cpcloud commented Nov 24, 2019

kolloch commented Nov 24, 2019

kolloch commented Nov 24, 2019

kolloch commented Nov 24, 2019

evanjs commented Nov 25, 2019 •

edited

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kolloch commented Nov 25, 2019

kolloch commented Nov 27, 2019

kolloch commented Mar 16, 2020

bbigras commented May 28, 2020

kolloch commented May 28, 2020

bbigras commented May 28, 2020

kolloch commented May 29, 2020

bbigras commented May 29, 2020

kolloch commented May 29, 2020

multiple matching crates for lazy_static when trying to compile tracing-core #51

multiple matching crates for lazy_static when trying to compile tracing-core #51

Comments

evanjs commented Nov 24, 2019

cpcloud commented Nov 24, 2019

kolloch commented Nov 24, 2019

kolloch commented Nov 24, 2019

kolloch commented Nov 24, 2019

evanjs commented Nov 25, 2019 • edited Loading

kolloch commented Nov 25, 2019

kolloch commented Nov 27, 2019

kolloch commented Mar 16, 2020

bbigras commented May 28, 2020

kolloch commented May 28, 2020

bbigras commented May 28, 2020

kolloch commented May 29, 2020

bbigras commented May 29, 2020

kolloch commented May 29, 2020

multiple matching crates for `lazy_static` when trying to compile `tracing-core` #51

multiple matching crates for `lazy_static` when trying to compile `tracing-core` #51

evanjs commented Nov 25, 2019 •

edited

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