[INFO] fetching crate rusty-forest 0.1.2...
[INFO] testing rusty-forest-0.1.2 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate rusty-forest 0.1.2 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate rusty-forest 0.1.2 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 crates.io crate rusty-forest 0.1.2
[INFO] finished tweaking crates.io crate rusty-forest 0.1.2
[INFO] tweaked toml for crates.io crate rusty-forest 0.1.2 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate rusty-forest 0.1.2 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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1b29a48543eee1cc0a5d0ff5b857308d7c3878483841c3627f6a1c6db9ee9bca
[INFO] running `Command { std: "docker" "start" "-a" "1b29a48543eee1cc0a5d0ff5b857308d7c3878483841c3627f6a1c6db9ee9bca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b29a48543eee1cc0a5d0ff5b857308d7c3878483841c3627f6a1c6db9ee9bca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b29a48543eee1cc0a5d0ff5b857308d7c3878483841c3627f6a1c6db9ee9bca", kill_on_drop: false }`
[INFO] [stdout] 1b29a48543eee1cc0a5d0ff5b857308d7c3878483841c3627f6a1c6db9ee9bca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8c3f4923cc3e43e4c0b5de223c5e6f8e3035b56c76e7f2d2770677d8addc08f7
[INFO] running `Command { std: "docker" "start" "-a" "8c3f4923cc3e43e4c0b5de223c5e6f8e3035b56c76e7f2d2770677d8addc08f7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.96
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling numtoa v0.1.0
[INFO] [stderr]    Compiling hex v0.4.3
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling itertools v0.10.1
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling termion v1.5.6
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling rusty-forest v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `str::<impl str>::to_lowercase` that must be used
[INFO] [stdout]    --> src/main.rs:622:13
[INFO] [stdout]     |
[INFO] [stdout] 622 |             t.to_lowercase();
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this returns the lowercase string as a new String, without modifying the original
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `str::<impl str>::to_lowercase` that must be used
[INFO] [stdout]    --> src/main.rs:688:13
[INFO] [stdout]     |
[INFO] [stdout] 688 |             x.to_lowercase();
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this returns the lowercase string as a new String, without modifying the original
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.69s
[INFO] running `Command { std: "docker" "inspect" "8c3f4923cc3e43e4c0b5de223c5e6f8e3035b56c76e7f2d2770677d8addc08f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c3f4923cc3e43e4c0b5de223c5e6f8e3035b56c76e7f2d2770677d8addc08f7", kill_on_drop: false }`
[INFO] [stdout] 8c3f4923cc3e43e4c0b5de223c5e6f8e3035b56c76e7f2d2770677d8addc08f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 077f75eadad8bcd9522581aaa5bafe5b3f58521c2d723c449d3427e632c1e53a
[INFO] running `Command { std: "docker" "start" "-a" "077f75eadad8bcd9522581aaa5bafe5b3f58521c2d723c449d3427e632c1e53a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rusty-forest v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `str::<impl str>::to_lowercase` that must be used
[INFO] [stdout]    --> src/main.rs:622:13
[INFO] [stdout]     |
[INFO] [stdout] 622 |             t.to_lowercase();
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this returns the lowercase string as a new String, without modifying the original
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `str::<impl str>::to_lowercase` that must be used
[INFO] [stdout]    --> src/main.rs:688:13
[INFO] [stdout]     |
[INFO] [stdout] 688 |             x.to_lowercase();
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this returns the lowercase string as a new String, without modifying the original
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.70s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/rusty_forest-42077d3487d62ee2)
[INFO] running `Command { std: "docker" "inspect" "077f75eadad8bcd9522581aaa5bafe5b3f58521c2d723c449d3427e632c1e53a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "077f75eadad8bcd9522581aaa5bafe5b3f58521c2d723c449d3427e632c1e53a", kill_on_drop: false }`
[INFO] [stdout] 077f75eadad8bcd9522581aaa5bafe5b3f58521c2d723c449d3427e632c1e53a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d31a47523c9d76cf71bd1b683816bdf6510e9170ee62cffb7bb3f4e3aefe02f8
[INFO] running `Command { std: "docker" "start" "-a" "d31a47523c9d76cf71bd1b683816bdf6510e9170ee62cffb7bb3f4e3aefe02f8", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused return value of `str::<impl str>::to_lowercase` that must be used
[INFO] [stderr]    --> src/main.rs:622:13
[INFO] [stderr]     |
[INFO] [stderr] 622 |             t.to_lowercase();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this returns the lowercase string as a new String, without modifying the original
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `str::<impl str>::to_lowercase` that must be used
[INFO] [stderr]    --> src/main.rs:688:13
[INFO] [stderr]     |
[INFO] [stderr] 688 |             x.to_lowercase();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this returns the lowercase string as a new String, without modifying the original
[INFO] [stderr] 
[INFO] [stderr] warning: `rusty-forest` (bin "rusty-forest" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.11s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rusty_forest-42077d3487d62ee2)
[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" "d31a47523c9d76cf71bd1b683816bdf6510e9170ee62cffb7bb3f4e3aefe02f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d31a47523c9d76cf71bd1b683816bdf6510e9170ee62cffb7bb3f4e3aefe02f8", kill_on_drop: false }`
[INFO] [stdout] d31a47523c9d76cf71bd1b683816bdf6510e9170ee62cffb7bb3f4e3aefe02f8