mach 0.3.2

# rustc version
rustc 1.37.0-nightly (37d001e4d 2019-05-29)# docs.rs version
cratesfyi 0.6.0 (be80566 2019-05-06)# build log
Updating crates.io index
Downloading crates ...
Downloaded mach v0.3.2
Documenting mach v0.3.2
Running `rustdoc --crate-name mach /home/cratesfyi/.cargo/registry/src/github.com-1ecc6299db9ec823/mach-0.3.2/src/lib.rs --cap-lints allow --color never -o /home/cratesfyi/cratesfyi/doc --cfg 'feature="default"' -Z unstable-options --resource-suffix -20190529-1.37.0-nightly-37d001e4d --static-root-path / --disable-per-crate-search --extern-html-root-url 'libc=https://docs.rs/libc/0.2.57' --extern-html-root-url 'rustc_std_workspace_core=https://docs.rs/rustc-std-workspace-core/1.0.0' -L dependency=/home/cratesfyi/cratesfyi/debug/deps`
error[E0464]: multiple matching crates for `libc`
--> /home/cratesfyi/.cargo/registry/src/github.com-1ecc6299db9ec823/mach-0.3.2/src/lib.rs:21:1
|
21 | extern crate libc;
| ^^^^^^^^^^^^^^^^^^
|
= note: candidates:
crate `libc`: /home/rustc/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-e5dbc16b1cd24a82.rlib
crate `libc`: /home/rustc/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-1efde0cdaa193bef.rlib

error[E0463]: can't find crate for `libc`
--> /home/cratesfyi/.cargo/registry/src/github.com-1ecc6299db9ec823/mach-0.3.2/src/lib.rs:21:1
|
21 | extern crate libc;
| ^^^^^^^^^^^^^^^^^^ can't find crate

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0463`.
thread 'main' panicked at 'ProcessError { desc: "process didn\'t exit successfully: `rustdoc --crate-name mach /home/cratesfyi/.cargo/registry/src/github.com-1ecc6299db9ec823/mach-0.3.2/src/lib.rs --cap-lints allow --color never -o /home/cratesfyi/cratesfyi/doc --cfg \'feature=\"default\"\' -Z unstable-options --resource-suffix -20190529-1.37.0-nightly-37d001e4d --static-root-path / --disable-per-crate-search --extern-html-root-url \'libc=https://docs.rs/libc/0.2.57\' --extern-html-root-url \'rustc_std_workspace_core=https://docs.rs/rustc-std-workspace-core/1.0.0\' -L dependency=/home/cratesfyi/cratesfyi/debug/deps` (exit code: 1)", exit: Some(ExitStatus(ExitStatus(256))), output: None }

Could not document `mach`.', src/bin/cratesfyi.rs:160:13
note: Run with `RUST_BACKTRACE=1` for a backtrace.