[INFO] cloning repository https://github.com/megalypse/rust_collections_exercise
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/megalypse/rust_collections_exercise" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmegalypse%2Frust_collections_exercise", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmegalypse%2Frust_collections_exercise'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c9af602a140cb4262ddb1dbd3792be6c999b669d
[INFO] building megalypse/rust_collections_exercise against try#615edd3ad1cf6871c977dc900317cb6c2070fd6b for pr-97334
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmegalypse%2Frust_collections_exercise" "/workspace/builds/worker-19/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-19/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/megalypse/rust_collections_exercise on toolchain 615edd3ad1cf6871c977dc900317cb6c2070fd6b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+615edd3ad1cf6871c977dc900317cb6c2070fd6b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/megalypse/rust_collections_exercise
[INFO] finished tweaking git repo https://github.com/megalypse/rust_collections_exercise
[INFO] tweaked toml for git repo https://github.com/megalypse/rust_collections_exercise written to /workspace/builds/worker-19/source/Cargo.toml
[INFO] crate git repo https://github.com/megalypse/rust_collections_exercise already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+615edd3ad1cf6871c977dc900317cb6c2070fd6b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+615edd3ad1cf6871c977dc900317cb6c2070fd6b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 17955229af714883a772ec2745bbd46b5956edb1186dc7a24c8577ff36187be6
[INFO] running `Command { std: "docker" "start" "-a" "17955229af714883a772ec2745bbd46b5956edb1186dc7a24c8577ff36187be6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "17955229af714883a772ec2745bbd46b5956edb1186dc7a24c8577ff36187be6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17955229af714883a772ec2745bbd46b5956edb1186dc7a24c8577ff36187be6", kill_on_drop: false }`
[INFO] [stdout] 17955229af714883a772ec2745bbd46b5956edb1186dc7a24c8577ff36187be6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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=forbid" "-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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+615edd3ad1cf6871c977dc900317cb6c2070fd6b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2bf008e34d9341b0c22caebe63d04ea1207c3b592136de9da6bbfd8ea4a8ae92
[INFO] running `Command { std: "docker" "start" "-a" "2bf008e34d9341b0c22caebe63d04ea1207c3b592136de9da6bbfd8ea4a8ae92", kill_on_drop: false }`
[INFO] [stderr]    Compiling ch_8_exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `res` is never read
[INFO] [stdout]  --> src/meds/median.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut res = 0;
[INFO] [stdout]   |             ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `new_word` is never read
[INFO] [stdout]  --> src/pig_latim/pig_latimner.rs:8:13
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut new_word = String::new();
[INFO] [stdout]   |             ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `Command { std: "docker" "inspect" "2bf008e34d9341b0c22caebe63d04ea1207c3b592136de9da6bbfd8ea4a8ae92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bf008e34d9341b0c22caebe63d04ea1207c3b592136de9da6bbfd8ea4a8ae92", kill_on_drop: false }`
[INFO] [stdout] 2bf008e34d9341b0c22caebe63d04ea1207c3b592136de9da6bbfd8ea4a8ae92
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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=forbid" "-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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+615edd3ad1cf6871c977dc900317cb6c2070fd6b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 43d0c73329f534a30dec8b49ffaa6d0e0aac471bf900f4c7a2a6854a3aeaf911
[INFO] running `Command { std: "docker" "start" "-a" "43d0c73329f534a30dec8b49ffaa6d0e0aac471bf900f4c7a2a6854a3aeaf911", kill_on_drop: false }`
[INFO] [stderr]    Compiling ch_8_exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `res` is never read
[INFO] [stdout]  --> src/meds/median.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut res = 0;
[INFO] [stdout]   |             ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `new_word` is never read
[INFO] [stdout]  --> src/pig_latim/pig_latimner.rs:8:13
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut new_word = String::new();
[INFO] [stdout]   |             ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.68s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/ch_8_exercises-5c63522e0760e967)
[INFO] running `Command { std: "docker" "inspect" "43d0c73329f534a30dec8b49ffaa6d0e0aac471bf900f4c7a2a6854a3aeaf911", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43d0c73329f534a30dec8b49ffaa6d0e0aac471bf900f4c7a2a6854a3aeaf911", kill_on_drop: false }`
[INFO] [stdout] 43d0c73329f534a30dec8b49ffaa6d0e0aac471bf900f4c7a2a6854a3aeaf911