[INFO] cloning repository https://github.com/ThatsGobbles/failure-test
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ThatsGobbles/failure-test" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThatsGobbles%2Ffailure-test", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThatsGobbles%2Ffailure-test'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 77db22cc2c0d5d2663efed45739ac37c96219a81
[INFO] testing ThatsGobbles/failure-test against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThatsGobbles%2Ffailure-test" "/workspace/builds/worker-21/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-21/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ThatsGobbles/failure-test on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ThatsGobbles/failure-test
[INFO] finished tweaking git repo https://github.com/ThatsGobbles/failure-test
[INFO] tweaked toml for git repo https://github.com/ThatsGobbles/failure-test written to /workspace/builds/worker-21/source/Cargo.toml
[INFO] crate git repo https://github.com/ThatsGobbles/failure-test already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 82e3c52a72da85e76aca923a84cc9d55f431eb1e6500b638a565929bd7c3557f
[INFO] running `Command { std: "docker" "start" "-a" "82e3c52a72da85e76aca923a84cc9d55f431eb1e6500b638a565929bd7c3557f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "82e3c52a72da85e76aca923a84cc9d55f431eb1e6500b638a565929bd7c3557f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82e3c52a72da85e76aca923a84cc9d55f431eb1e6500b638a565929bd7c3557f", kill_on_drop: false }`
[INFO] [stdout] 82e3c52a72da85e76aca923a84cc9d55f431eb1e6500b638a565929bd7c3557f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7ac25d9f0880a25927df3618ce95a2631eebf30e9be466d06ddc9b67b5820a38
[INFO] running `Command { std: "docker" "start" "-a" "7ac25d9f0880a25927df3618ce95a2631eebf30e9be466d06ddc9b67b5820a38", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling failure_derive v0.1.2
[INFO] [stderr]    Compiling cfg-if v0.1.5
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling backtrace v0.3.9
[INFO] [stderr]    Compiling synstructure v0.9.0
[INFO] [stderr]    Compiling failure v0.1.2
[INFO] [stderr]    Compiling failure-test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/error_kind_pair.rs:28:32
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn cause(&self) -> Option<&Fail> { self.inner.cause() }
[INFO] [stdout]    |                                ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 28 -     fn cause(&self) -> Option<&Fail> { self.inner.cause() }
[INFO] [stdout] 28 +     fn cause(&self) -> Option<&dyn Fail> { self.inner.cause() }
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/error_kind_pair.rs:67:28
[INFO] [stdout]    |
[INFO] [stdout] 67 |                 let fail: &Fail = &e;
[INFO] [stdout]    |                            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 67 -                 let fail: &Fail = &e;
[INFO] [stdout] 67 +                 let fail: &dyn Fail = &e;
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ErrorA1`
[INFO] [stdout]  --> src/custom_fail_type.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     ErrorA1(String),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `ErrorKindA` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/custom_fail_type.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[derive(Clone, PartialEq, Eq, Debug, Fail)]
[INFO] [stdout]   |          ^^^^^                 ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ErrorA2`
[INFO] [stdout]  --> src/custom_fail_type.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     ErrorA2(String),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `ErrorKindA` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/custom_fail_type.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[derive(Clone, PartialEq, Eq, Debug, Fail)]
[INFO] [stdout]   |          ^^^^^                 ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ErrorB1`
[INFO] [stdout]   --> src/custom_fail_type.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     ErrorB1(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `ErrorKindB` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/custom_fail_type.rs:12:10
[INFO] [stdout]    |
[INFO] [stdout] 12 | #[derive(Clone, PartialEq, Eq, Debug, Fail)]
[INFO] [stdout]    |          ^^^^^                 ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ErrorB2`
[INFO] [stdout]   --> src/custom_fail_type.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     ErrorB2(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `ErrorKindB` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/custom_fail_type.rs:12:10
[INFO] [stdout]    |
[INFO] [stdout] 12 | #[derive(Clone, PartialEq, Eq, Debug, Fail)]
[INFO] [stdout]    |          ^^^^^                 ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `example`
[INFO] [stdout]   --> src/custom_fail_type.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn example() {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.13s
[INFO] running `Command { std: "docker" "inspect" "7ac25d9f0880a25927df3618ce95a2631eebf30e9be466d06ddc9b67b5820a38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ac25d9f0880a25927df3618ce95a2631eebf30e9be466d06ddc9b67b5820a38", kill_on_drop: false }`
[INFO] [stdout] 7ac25d9f0880a25927df3618ce95a2631eebf30e9be466d06ddc9b67b5820a38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 877b464bae970a876dd7e35ef8d758e5bcf8e2b69d3b6d2d27c5d96534bfb13d
[INFO] running `Command { std: "docker" "start" "-a" "877b464bae970a876dd7e35ef8d758e5bcf8e2b69d3b6d2d27c5d96534bfb13d", kill_on_drop: false }`
[INFO] [stderr]    Compiling failure-test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/error_kind_pair.rs:28:32
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn cause(&self) -> Option<&Fail> { self.inner.cause() }
[INFO] [stdout]    |                                ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 28 -     fn cause(&self) -> Option<&Fail> { self.inner.cause() }
[INFO] [stdout] 28 +     fn cause(&self) -> Option<&dyn Fail> { self.inner.cause() }
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/error_kind_pair.rs:67:28
[INFO] [stdout]    |
[INFO] [stdout] 67 |                 let fail: &Fail = &e;
[INFO] [stdout]    |                            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 67 -                 let fail: &Fail = &e;
[INFO] [stdout] 67 +                 let fail: &dyn Fail = &e;
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ErrorA1`
[INFO] [stdout]  --> src/custom_fail_type.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     ErrorA1(String),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `ErrorKindA` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/custom_fail_type.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[derive(Clone, PartialEq, Eq, Debug, Fail)]
[INFO] [stdout]   |          ^^^^^                 ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ErrorA2`
[INFO] [stdout]  --> src/custom_fail_type.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     ErrorA2(String),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `ErrorKindA` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/custom_fail_type.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[derive(Clone, PartialEq, Eq, Debug, Fail)]
[INFO] [stdout]   |          ^^^^^                 ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ErrorB1`
[INFO] [stdout]   --> src/custom_fail_type.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     ErrorB1(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `ErrorKindB` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/custom_fail_type.rs:12:10
[INFO] [stdout]    |
[INFO] [stdout] 12 | #[derive(Clone, PartialEq, Eq, Debug, Fail)]
[INFO] [stdout]    |          ^^^^^                 ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ErrorB2`
[INFO] [stdout]   --> src/custom_fail_type.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     ErrorB2(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `ErrorKindB` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/custom_fail_type.rs:12:10
[INFO] [stdout]    |
[INFO] [stdout] 12 | #[derive(Clone, PartialEq, Eq, Debug, Fail)]
[INFO] [stdout]    |          ^^^^^                 ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `example`
[INFO] [stdout]   --> src/custom_fail_type.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn example() {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "877b464bae970a876dd7e35ef8d758e5bcf8e2b69d3b6d2d27c5d96534bfb13d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "877b464bae970a876dd7e35ef8d758e5bcf8e2b69d3b6d2d27c5d96534bfb13d", kill_on_drop: false }`
[INFO] [stdout] 877b464bae970a876dd7e35ef8d758e5bcf8e2b69d3b6d2d27c5d96534bfb13d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d2b5d1dc0d4ba2a9f52b20278acacba2f7ecd758d79f1aab806c96436f0ec6a2
[INFO] running `Command { std: "docker" "start" "-a" "d2b5d1dc0d4ba2a9f52b20278acacba2f7ecd758d79f1aab806c96436f0ec6a2", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error_kind_pair.rs:28:32
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn cause(&self) -> Option<&Fail> { self.inner.cause() }
[INFO] [stderr]    |                                ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 28 -     fn cause(&self) -> Option<&Fail> { self.inner.cause() }
[INFO] [stderr] 28 +     fn cause(&self) -> Option<&dyn Fail> { self.inner.cause() }
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error_kind_pair.rs:67:28
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 let fail: &Fail = &e;
[INFO] [stderr]    |                            ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 67 -                 let fail: &Fail = &e;
[INFO] [stderr] 67 +                 let fail: &dyn Fail = &e;
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ErrorA1`
[INFO] [stderr]  --> src/custom_fail_type.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     ErrorA1(String),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] note: `ErrorKindA` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]  --> src/custom_fail_type.rs:4:10
[INFO] [stderr]   |
[INFO] [stderr] 4 | #[derive(Clone, PartialEq, Eq, Debug, Fail)]
[INFO] [stderr]   |          ^^^^^                 ^^^^^
[INFO] [stderr]   = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ErrorA2`
[INFO] [stderr]  --> src/custom_fail_type.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     ErrorA2(String),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] note: `ErrorKindA` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]  --> src/custom_fail_type.rs:4:10
[INFO] [stderr]   |
[INFO] [stderr] 4 | #[derive(Clone, PartialEq, Eq, Debug, Fail)]
[INFO] [stderr]   |          ^^^^^                 ^^^^^
[INFO] [stderr]   = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ErrorB1`
[INFO] [stderr]   --> src/custom_fail_type.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     ErrorB1(String),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `ErrorKindB` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/custom_fail_type.rs:12:10
[INFO] [stderr]    |
[INFO] [stderr] 12 | #[derive(Clone, PartialEq, Eq, Debug, Fail)]
[INFO] [stderr]    |          ^^^^^                 ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ErrorB2`
[INFO] [stderr]   --> src/custom_fail_type.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     ErrorB2(String),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `ErrorKindB` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/custom_fail_type.rs:12:10
[INFO] [stderr]    |
[INFO] [stderr] 12 | #[derive(Clone, PartialEq, Eq, Debug, Fail)]
[INFO] [stderr]    |          ^^^^^                 ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `example`
[INFO] [stderr]   --> src/custom_fail_type.rs:20:8
[INFO] [stderr]    |
[INFO] [stderr] 20 | pub fn example() {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `failure-test` (bin "failure-test" test) generated 7 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/failure_test-9884b98efad8e37b)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d2b5d1dc0d4ba2a9f52b20278acacba2f7ecd758d79f1aab806c96436f0ec6a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2b5d1dc0d4ba2a9f52b20278acacba2f7ecd758d79f1aab806c96436f0ec6a2", kill_on_drop: false }`
[INFO] [stdout] d2b5d1dc0d4ba2a9f52b20278acacba2f7ecd758d79f1aab806c96436f0ec6a2