[INFO] fetching crate fern_macros 0.1.8...
[INFO] testing fern_macros-0.1.8 against 1.49.0 for beta-1.50-1
[INFO] extracting crate fern_macros 0.1.8 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate fern_macros 0.1.8 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fern_macros 0.1.8
[INFO] finished tweaking crates.io crate fern_macros 0.1.8
[INFO] tweaked toml for crates.io crate fern_macros 0.1.8 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1784fca188da6852263fb5bd7fbe987f295dccc0b201aab8ff0d26d1da3d9dd2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1784fca188da6852263fb5bd7fbe987f295dccc0b201aab8ff0d26d1da3d9dd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1784fca188da6852263fb5bd7fbe987f295dccc0b201aab8ff0d26d1da3d9dd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1784fca188da6852263fb5bd7fbe987f295dccc0b201aab8ff0d26d1da3d9dd2", kill_on_drop: false }`
[INFO] [stdout] 1784fca188da6852263fb5bd7fbe987f295dccc0b201aab8ff0d26d1da3d9dd2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca44789f1e2f5b3d0731eb861dd32caa2252f22df808b0d54ba7e313f25ce08c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ca44789f1e2f5b3d0731eb861dd32caa2252f22df808b0d54ba7e313f25ce08c", kill_on_drop: false }`
[INFO] [stderr]    Compiling fern v0.1.12
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/local.rs:23:1
[INFO] [stdout]    |
[INFO] [stdout] 23 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/local.rs:35:1
[INFO] [stdout]    |
[INFO] [stdout] 35 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/lib.rs:137:1
[INFO] [stdout]     |
[INFO] [stdout] 137 | #[unstable]
[INFO] [stdout]     | ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     #[unstable]
[INFO] [stdout]    |     ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[unstable]
[INFO] [stdout]   | ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     #[unstable]
[INFO] [stdout]    |     ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     #[unstable]
[INFO] [stdout]    |     ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     #[unstable]
[INFO] [stdout]    |     ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     #[unstable]
[INFO] [stdout]    |     ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:23:1
[INFO] [stdout]    |
[INFO] [stdout] 23 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `stable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:39:1
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[stable]
[INFO] [stdout]    | ^^^^^^^^^ help: must be of the form: `#[stable(feature = "name", since = "version")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     #[unstable]
[INFO] [stdout]    |     ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:42:1
[INFO] [stdout]    |
[INFO] [stdout] 42 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:58:1
[INFO] [stdout]    |
[INFO] [stdout] 58 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/config.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/config.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     #[unstable]
[INFO] [stdout]    |     ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/config.rs:28:1
[INFO] [stdout]    |
[INFO] [stdout] 28 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/config.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     #[unstable]
[INFO] [stdout]    |     ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/config.rs:47:1
[INFO] [stdout]    |
[INFO] [stdout] 47 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/config.rs:72:5
[INFO] [stdout]    |
[INFO] [stdout] 72 |     #[unstable]
[INFO] [stdout]    |     ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/config.rs:68:1
[INFO] [stdout]    |
[INFO] [stdout] 68 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/loggers.rs:90:1
[INFO] [stdout]    |
[INFO] [stdout] 90 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/config.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::old_io as io;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^ no `old_io` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/config.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::old_io::stdio;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/loggers.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::old_io as io;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^ no `old_io` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/loggers.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::old_io::stdio;
[INFO] [stdout]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::old_io`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/errors.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::old_io as io;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^ no `old_io` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Path` in this scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/config.rs:35:10
[INFO] [stdout]    |
[INFO] [stdout] 35 |     File(Path),
[INFO] [stdout]    |          ^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout] 1  | use std::path::Path;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Path` in this scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/loggers.rs:76:29
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub fn with_file(path: &Path) -> io::IoResult<WriterLogger<io::File>> {
[INFO] [stdout]    |                             ^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout] 1  | use std::path::Path;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `FromError` in module `error`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/errors.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl error::FromError<io::IoError> for Error {
[INFO] [stdout]    |             ^^^^^^^^^ not found in `error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `FromError` in module `error`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/errors.rs:17:17
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl <T> error::FromError<sync::PoisonError<T>> for Error {
[INFO] [stdout]    |                 ^^^^^^^^^ not found in `error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(old_io, old_path)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/lib.rs:137:1
[INFO] [stdout]     |
[INFO] [stdout] 137 | #[unstable]
[INFO] [stdout]     | ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/local.rs:23:1
[INFO] [stdout]    |
[INFO] [stdout] 23 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/local.rs:35:1
[INFO] [stdout]    |
[INFO] [stdout] 35 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[unstable]
[INFO] [stdout]   | ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     #[unstable]
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:23:1
[INFO] [stdout]    |
[INFO] [stdout] 23 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     #[unstable]
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     #[unstable]
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     #[unstable]
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     #[unstable]
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:39:1
[INFO] [stdout]    |
[INFO] [stdout] 39 | #[stable]
[INFO] [stdout]    | ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:42:1
[INFO] [stdout]    |
[INFO] [stdout] 42 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     #[unstable]
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/api.rs:58:1
[INFO] [stdout]    |
[INFO] [stdout] 58 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/config.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/config.rs:28:1
[INFO] [stdout]    |
[INFO] [stdout] 28 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/config.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     #[unstable]
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/config.rs:47:1
[INFO] [stdout]    |
[INFO] [stdout] 47 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/config.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     #[unstable]
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/config.rs:68:1
[INFO] [stdout]    |
[INFO] [stdout] 68 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/config.rs:72:5
[INFO] [stdout]    |
[INFO] [stdout] 72 |     #[unstable]
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/fern-0.1.12/src/loggers.rs:90:1
[INFO] [stdout]    |
[INFO] [stdout] 90 | #[unstable]
[INFO] [stdout]    | ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 58 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0405, E0412, E0432, E0554, E0734.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0405`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fern`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "ca44789f1e2f5b3d0731eb861dd32caa2252f22df808b0d54ba7e313f25ce08c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca44789f1e2f5b3d0731eb861dd32caa2252f22df808b0d54ba7e313f25ce08c", kill_on_drop: false }`
[INFO] [stdout] ca44789f1e2f5b3d0731eb861dd32caa2252f22df808b0d54ba7e313f25ce08c