cargo: error on building fresh project

[alexreg]

I create a new project using cargo new hello_world --bin, and then run cargo build -v, but get the following error.

Process didn't exit successfully: `rustc - --crate-name - --crate-type dylib --crate-type bin --print=file-names` (status=101)
--- stderr
error: crate name cannot start with a hyphen: -
error: aborting due to previous error

This error just started appearing since I updated to the latest nightly.

Incidentally, there seems to be no different to the Cargo.toml file or directory structure or indeed main.rs file, regardless of whether I specify the --bin option or not to cargo new. Is this right?

[dguo]

See rust-lang/cargo#1342

[alexreg]

Ah okay, so it should be fixed in the next nightly?

Any idea about the second issue (re —bin), incidentally?

On 26 Feb 2015, at 01:58, Danny Guo notifications@github.com wrote:

See rust-lang/cargo#1342 rust-lang/cargo#1342
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Reply to this email directly or view it on GitHub #22822 (comment).

[dguo]

Yes, I assume the fix will be in the next nightly.

There should be a difference. Specifically, leaving off --bin should give you a .gitignore with Cargo.lock in it. See rust-lang/cargo#315

In src, you should also have a lib.rs file with a test function instead of main.rs with main.

Maybe double check to make sure you aren't specifying --bin? I just tried again, and it works fine for me. I am also on the latest nightly.

[alexreg]

Thanks for confirming.

And yes, my bad; I must have been too hasty in checking the src/ dirs here.

On 26 Feb 2015, at 02:18, Danny Guo notifications@github.com wrote:

Yes, I assume the fix will be in the next nightly.

There should be a difference. Specifically, leaving off --bin should give you a .gitignore with Cargo.lock in it. See rust-lang/cargo#315 rust-lang/cargo#315
In src, you should also have a lib.rs file with a test function instead of main.rs with main.

Maybe double check to make sure you aren't specifying --bin? I just tried again, and it works fine for me. I am also on the latest nightly.

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Reply to this email directly or view it on GitHub #22822 (comment).

[alexcrichton]

Closing as a duplicate of rust-lang/cargo#1342 (this should be fixed in the next nightly)