[INFO] cloning repository https://github.com/guangie88/unwalk
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/guangie88/unwalk" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguangie88%2Funwalk", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguangie88%2Funwalk'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9be570627bcd5c50e4d3eb7632c6e6027895bb31
[INFO] testing guangie88/unwalk against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguangie88%2Funwalk" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/guangie88/unwalk on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/guangie88/unwalk
[INFO] finished tweaking git repo https://github.com/guangie88/unwalk
[INFO] tweaked toml for git repo https://github.com/guangie88/unwalk written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/guangie88/unwalk already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a7956feb4a15ed6c28ef34ee8b09a7ad499b1bbd5c157283fce934138987090d
[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" "a7956feb4a15ed6c28ef34ee8b09a7ad499b1bbd5c157283fce934138987090d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7956feb4a15ed6c28ef34ee8b09a7ad499b1bbd5c157283fce934138987090d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7956feb4a15ed6c28ef34ee8b09a7ad499b1bbd5c157283fce934138987090d", kill_on_drop: false }`
[INFO] [stdout] a7956feb4a15ed6c28ef34ee8b09a7ad499b1bbd5c157283fce934138987090d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 84e9beeb8c0b78d6534f04961a0775011dabe3cd1889164261cfe64e4eaec804
[INFO] running `Command { std: "docker" "start" "-a" "84e9beeb8c0b78d6534f04961a0775011dabe3cd1889164261cfe64e4eaec804", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.9
[INFO] [stderr]    Compiling file v1.1.1
[INFO] [stderr]    Compiling same-file v1.0.2
[INFO] [stderr]    Compiling filebuffer v0.3.0
[INFO] [stderr]    Compiling toml v0.4.5
[INFO] [stderr]    Compiling syn v0.12.15
[INFO] [stderr]    Compiling walkdir v2.1.4
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling miniz-sys v0.1.10
[INFO] [stderr]    Compiling flate2 v1.0.1
[INFO] [stderr]    Compiling structopt-derive v0.2.6
[INFO] [stderr]    Compiling structopt v0.2.6
[INFO] [stderr]    Compiling backtrace v0.3.5
[INFO] [stderr]    Compiling failure v0.1.1
[INFO] [stderr]    Compiling unwalk-base v0.2.0-beta1 (/opt/rustwide/workdir/base)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> base/src/error.rs:46:16
[INFO] [stdout]    |
[INFO] [stdout] 46 |     error: Box<std::error::Error + Sync + Send>,
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> base/src/lib.rs:2:54
[INFO] [stdout]    |
[INFO] [stdout] 2  | #![deny(missing_debug_implementations, missing_docs, warnings)]
[INFO] [stdout]    |                                                      ^^^^^^^^
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` implied by `#[warn(warnings)]`
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) 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] 46 -     error: Box<std::error::Error + Sync + Send>,
[INFO] [stdout] 46 +     error: Box<dyn std::error::Error + Sync + Send>,
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> base/src/error.rs:57:21
[INFO] [stdout]    |
[INFO] [stdout] 57 |         E: Into<Box<std::error::Error + Sync + Send>>,
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) 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] 57 -         E: Into<Box<std::error::Error + Sync + Send>>,
[INFO] [stdout] 57 +         E: Into<Box<dyn std::error::Error + Sync + Send>>,
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling unwalk-gz v0.2.0-beta1 (/opt/rustwide/workdir/gz)
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling unwalk v0.2.0-beta1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]   --> src/verbose.rs:29:38
[INFO] [stdout]    |
[INFO] [stdout] 29 |         verbose_log!(1, $level, $fmt);
[INFO] [stdout]    |                                      ^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:93:18
[INFO] [stdout]    |
[INFO] [stdout] 93 |         Ok(_) => v1!(config.verbose, "Unwalk complete!"),
[INFO] [stdout]    |                  --------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/main.rs:9:54
[INFO] [stdout]    |
[INFO] [stdout] 9  | #![deny(missing_debug_implementations, missing_docs, warnings)]
[INFO] [stdout]    |                                                      ^^^^^^^^
[INFO] [stdout]    = note: `#[warn(semicolon_in_expressions_from_macros)]` implied by `#[warn(warnings)]`
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]    = note: this warning originates in the macro `v1` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 42.29s
[INFO] running `Command { std: "docker" "inspect" "84e9beeb8c0b78d6534f04961a0775011dabe3cd1889164261cfe64e4eaec804", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84e9beeb8c0b78d6534f04961a0775011dabe3cd1889164261cfe64e4eaec804", kill_on_drop: false }`
[INFO] [stdout] 84e9beeb8c0b78d6534f04961a0775011dabe3cd1889164261cfe64e4eaec804
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2e1cef4a311567f2b1185f6fa8b18e4b6f34dd4ede565483a054cbf6cade1de7
[INFO] running `Command { std: "docker" "start" "-a" "2e1cef4a311567f2b1185f6fa8b18e4b6f34dd4ede565483a054cbf6cade1de7", kill_on_drop: false }`
[INFO] [stderr]    Compiling unwalk v0.2.0-beta1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> base/src/error.rs:46:16
[INFO] [stdout]    |
[INFO] [stdout] 46 |     error: Box<std::error::Error + Sync + Send>,
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> base/src/lib.rs:2:54
[INFO] [stdout]    |
[INFO] [stdout] 2  | #![deny(missing_debug_implementations, missing_docs, warnings)]
[INFO] [stdout]    |                                                      ^^^^^^^^
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` implied by `#[warn(warnings)]`
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) 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] 46 -     error: Box<std::error::Error + Sync + Send>,
[INFO] [stdout] 46 +     error: Box<dyn std::error::Error + Sync + Send>,
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> base/src/error.rs:57:21
[INFO] [stdout]    |
[INFO] [stdout] 57 |         E: Into<Box<std::error::Error + Sync + Send>>,
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) 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] 57 -         E: Into<Box<std::error::Error + Sync + Send>>,
[INFO] [stdout] 57 +         E: Into<Box<dyn std::error::Error + Sync + Send>>,
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]   --> src/verbose.rs:29:38
[INFO] [stdout]    |
[INFO] [stdout] 29 |         verbose_log!(1, $level, $fmt);
[INFO] [stdout]    |                                      ^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:93:18
[INFO] [stdout]    |
[INFO] [stdout] 93 |         Ok(_) => v1!(config.verbose, "Unwalk complete!"),
[INFO] [stdout]    |                  --------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/main.rs:9:54
[INFO] [stdout]    |
[INFO] [stdout] 9  | #![deny(missing_debug_implementations, missing_docs, warnings)]
[INFO] [stdout]    |                                                      ^^^^^^^^
[INFO] [stdout]    = note: `#[warn(semicolon_in_expressions_from_macros)]` implied by `#[warn(warnings)]`
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]    = note: this warning originates in the macro `v1` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.75s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/unwalk-ce6f25f58f6d1797)
[INFO] running `Command { std: "docker" "inspect" "2e1cef4a311567f2b1185f6fa8b18e4b6f34dd4ede565483a054cbf6cade1de7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e1cef4a311567f2b1185f6fa8b18e4b6f34dd4ede565483a054cbf6cade1de7", kill_on_drop: false }`
[INFO] [stdout] 2e1cef4a311567f2b1185f6fa8b18e4b6f34dd4ede565483a054cbf6cade1de7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 41b75c0c563d950b4d430be1bafe16d673ebe605154dcb5df32c3a7615c4fe04
[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" "41b75c0c563d950b4d430be1bafe16d673ebe605154dcb5df32c3a7615c4fe04", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> base/src/error.rs:46:16
[INFO] [stderr]    |
[INFO] [stderr] 46 |     error: Box<std::error::Error + Sync + Send>,
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: the lint level is defined here
[INFO] [stderr]   --> base/src/lib.rs:2:54
[INFO] [stderr]    |
[INFO] [stderr] 2  | #![deny(missing_debug_implementations, missing_docs, warnings)]
[INFO] [stderr]    |                                                      ^^^^^^^^
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` implied by `#[warn(warnings)]`
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) 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] 46 -     error: Box<std::error::Error + Sync + Send>,
[INFO] [stderr] 46 +     error: Box<dyn std::error::Error + Sync + Send>,
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> base/src/error.rs:57:21
[INFO] [stderr]    |
[INFO] [stderr] 57 |         E: Into<Box<std::error::Error + Sync + Send>>,
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) 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] 57 -         E: Into<Box<std::error::Error + Sync + Send>>,
[INFO] [stderr] 57 +         E: Into<Box<dyn std::error::Error + Sync + Send>>,
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: `unwalk-base` (lib) generated 2 warnings
[INFO] [stderr] warning: trailing semicolon in macro used in expression position
[INFO] [stderr]   --> src/verbose.rs:29:38
[INFO] [stderr]    |
[INFO] [stderr] 29 |         verbose_log!(1, $level, $fmt);
[INFO] [stderr]    |                                      ^
[INFO] [stderr]    |
[INFO] [stderr]   ::: src/main.rs:93:18
[INFO] [stderr]    |
[INFO] [stderr] 93 |         Ok(_) => v1!(config.verbose, "Unwalk complete!"),
[INFO] [stderr]    |                  --------------------------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr] note: the lint level is defined here
[INFO] [stderr]   --> src/main.rs:9:54
[INFO] [stderr]    |
[INFO] [stderr] 9  | #![deny(missing_debug_implementations, missing_docs, warnings)]
[INFO] [stderr]    |                                                      ^^^^^^^^
[INFO] [stderr]    = note: `#[warn(semicolon_in_expressions_from_macros)]` implied by `#[warn(warnings)]`
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]    = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stderr]    = note: this warning originates in the macro `v1` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `unwalk` (bin "unwalk" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/unwalk-ce6f25f58f6d1797)
[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" "41b75c0c563d950b4d430be1bafe16d673ebe605154dcb5df32c3a7615c4fe04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41b75c0c563d950b4d430be1bafe16d673ebe605154dcb5df32c3a7615c4fe04", kill_on_drop: false }`
[INFO] [stdout] 41b75c0c563d950b4d430be1bafe16d673ebe605154dcb5df32c3a7615c4fe04