[INFO] cloning repository https://github.com/Osspial/letter-pair
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Osspial/letter-pair" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOsspial%2Fletter-pair", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOsspial%2Fletter-pair'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e6317b4cab7c9b1252584958d8e6346777837657
[INFO] testing Osspial/letter-pair against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOsspial%2Fletter-pair" "/workspace/builds/worker-86/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-86/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Osspial/letter-pair on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Osspial/letter-pair
[INFO] finished tweaking git repo https://github.com/Osspial/letter-pair
[INFO] tweaked toml for git repo https://github.com/Osspial/letter-pair written to /workspace/builds/worker-86/source/Cargo.toml
[INFO] crate git repo https://github.com/Osspial/letter-pair already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e97840dcbfa11b5e394a17651566d239b657136e8d2b6d4f7dec4649dcd6ded9
[INFO] running `Command { std: "docker" "start" "-a" "e97840dcbfa11b5e394a17651566d239b657136e8d2b6d4f7dec4649dcd6ded9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e97840dcbfa11b5e394a17651566d239b657136e8d2b6d4f7dec4649dcd6ded9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e97840dcbfa11b5e394a17651566d239b657136e8d2b6d4f7dec4649dcd6ded9", kill_on_drop: false }`
[INFO] [stdout] e97840dcbfa11b5e394a17651566d239b657136e8d2b6d4f7dec4649dcd6ded9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 970b2e3e3aca1e27f74ea453d6dea0d35bc4408770206d0d94595e9454aad3bd
[INFO] running `Command { std: "docker" "start" "-a" "970b2e3e3aca1e27f74ea453d6dea0d35bc4408770206d0d94595e9454aad3bd", kill_on_drop: false }`
[INFO] [stderr]    Compiling letter-pair v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `wheel_max_len`
[INFO] [stdout]   --> src/main.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let wheel_max_len = 8;
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_wheel_max_len`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.26s
[INFO] running `Command { std: "docker" "inspect" "970b2e3e3aca1e27f74ea453d6dea0d35bc4408770206d0d94595e9454aad3bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "970b2e3e3aca1e27f74ea453d6dea0d35bc4408770206d0d94595e9454aad3bd", kill_on_drop: false }`
[INFO] [stdout] 970b2e3e3aca1e27f74ea453d6dea0d35bc4408770206d0d94595e9454aad3bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 50bbb3b6381318c1cfaf2d35c6007d9607cfee78688a877cc2b378a225e8913a
[INFO] running `Command { std: "docker" "start" "-a" "50bbb3b6381318c1cfaf2d35c6007d9607cfee78688a877cc2b378a225e8913a", kill_on_drop: false }`
[INFO] [stderr]    Compiling letter-pair v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `wheel_max_len`
[INFO] [stdout]   --> src/main.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let wheel_max_len = 8;
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_wheel_max_len`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.10s
[INFO] running `Command { std: "docker" "inspect" "50bbb3b6381318c1cfaf2d35c6007d9607cfee78688a877cc2b378a225e8913a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50bbb3b6381318c1cfaf2d35c6007d9607cfee78688a877cc2b378a225e8913a", kill_on_drop: false }`
[INFO] [stdout] 50bbb3b6381318c1cfaf2d35c6007d9607cfee78688a877cc2b378a225e8913a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3656efa289fb8529817848e7d71fa0dcdbb44d4fec1fd7a6f20162f0ae2fb1a5
[INFO] running `Command { std: "docker" "start" "-a" "3656efa289fb8529817848e7d71fa0dcdbb44d4fec1fd7a6f20162f0ae2fb1a5", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `wheel_max_len`
[INFO] [stderr]   --> src/main.rs:74:9
[INFO] [stderr]    |
[INFO] [stderr] 74 |     let wheel_max_len = 8;
[INFO] [stderr]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_wheel_max_len`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `letter-pair` (bin "letter-pair" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/letter_pair-81cde83c099880c1)
[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" "3656efa289fb8529817848e7d71fa0dcdbb44d4fec1fd7a6f20162f0ae2fb1a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3656efa289fb8529817848e7d71fa0dcdbb44d4fec1fd7a6f20162f0ae2fb1a5", kill_on_drop: false }`
[INFO] [stdout] 3656efa289fb8529817848e7d71fa0dcdbb44d4fec1fd7a6f20162f0ae2fb1a5