rustdoc: unclear behaviour/error message in case of missing "plugin" field"

[denisandroid]

The project is executed, but the documentation is executed with an error.

#![feature(plugin)]
#![plugin(clucstr)]

use std::ffi::CStr;

fn main() {
		println_str(cstr!("cluWorld!!!"));
		//CSTR "cluWorld!!!"
		//CArray [99, 108, 117, 87, 111, 114, 108, 100, 33, 33, 33, 0] 12

		println_str(cstr!(b"cluWorld!!!"));
		//CSTR "cluWorld!!!"
		//CArray [99, 108, 117, 87, 111, 114, 108, 100, 33, 33, 33, 0] 12

		println_str(cstr!(b'A'));
		//CSTR "A"
		//CArray [65, 0] 2
}


fn println_str(cstr: &CStr) {
		println!("CSTR {:?}", cstr);

		let cstr_array = cstr.to_bytes_with_nul();
		println!("CArray {:?} {}", cstr_array, cstr_array.len());
		println!();
}

cargo run

CSTR "cluWorld!!!"
CArray [99, 108, 117, 87, 111, 114, 108, 100, 33, 33, 33, 0] 12

CSTR "cluWorld!!!"
CArray [99, 108, 117, 87, 111, 114, 108, 100, 33, 33, 33, 0] 12

CSTR "A"
CArray [65, 0] 2

cargo doc --open

 Compiling clucstr v0.1.1 (file:///cluCStr)
 Documenting clucstr v0.1.1 (file:///cluCStr)
 Documenting testcluStr v0.1.0 (file:///testcluStr)
error[E0457]: plugin `clucstr` only found in rlib format, but must be available in dylib format
 --> src/main.rs:2:11
	|
2 | #![plugin(clucstr)]
	|           ^^^^^^^

error: cannot find macro `cstr!` in this scope
 --> src/main.rs:7:17
	|
7 |     println_str(cstr!("cluWorld!!!"));
	|                 ^^^^

error: cannot find macro `cstr!` in this scope
	--> src/main.rs:11:17
	 |
11 |     println_str(cstr!(b"cluWorld!!!"));
	 |                 ^^^^

error: cannot find macro `cstr!` in this scope
	--> src/main.rs:15:17
	 |
15 |     println_str(cstr!(b'A'));
	 |                 ^^^^

error: Could not document `testcluStr`.

Caused by:
	process didn't exit successfully: `rustdoc --crate-name testcluStr src/main.rs -o /testcluStr/target/doc -L dependency=/testcluStr/target/debug/deps --extern clucstr=/testcluStr/target/debug/deps/libclucstr-83201db073bd59f0.rmeta` (exit code: 101)

Version

cargo --version
cargo 1.26.0-nightly (008c36908 2018-04-13)

rustc --version
rustc 1.27.0-nightly (bd40cbbe1 2018-04-14)

Lib - compile plugin

https://crates.io/crates/clucstr

[dependencies]
clucstr = "<0.1.1"

Project files

https://github.com/denisandroid/Issue-49995

[denisandroid]

It was required to explicitly indicate the "plugin" in the description of the library.

[lib]
name = "clucstr"
crate-type = ["dylib", "rlib"]
plugin = true <----

this is strange...

[denisandroid]

At the request of the community, the issue was opened.

[dependencies]
clucstr = "<0.1.1"

[Mark-Simulacrum]

Closing since plugins are slated for removal, clucstr should probably move to being a proc macro (they should be able to do what's needed for that impl today, I believe).