[INFO] cloning repository https://github.com/rust-learn/trait
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rust-learn/trait" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-learn%2Ftrait", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-learn%2Ftrait'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6291735a1d4a33535400b2920b115f7d2bb73e6f
[INFO] testing rust-learn/trait 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%2Frust-learn%2Ftrait" "/workspace/builds/worker-24/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-24/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rust-learn/trait 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/rust-learn/trait
[INFO] finished tweaking git repo https://github.com/rust-learn/trait
[INFO] tweaked toml for git repo https://github.com/rust-learn/trait written to /workspace/builds/worker-24/source/Cargo.toml
[INFO] crate git repo https://github.com/rust-learn/trait 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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] 1825535f074cbc0df538bf0a4c5850c42c5bac9f237277025a903a1016c2a507
[INFO] running `Command { std: "docker" "start" "-a" "1825535f074cbc0df538bf0a4c5850c42c5bac9f237277025a903a1016c2a507", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1825535f074cbc0df538bf0a4c5850c42c5bac9f237277025a903a1016c2a507", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1825535f074cbc0df538bf0a4c5850c42c5bac9f237277025a903a1016c2a507", kill_on_drop: false }`
[INFO] [stdout] 1825535f074cbc0df538bf0a4c5850c42c5bac9f237277025a903a1016c2a507
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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] 74eb388d04d7dfa97b59d1d08964125c0e76320d4e494754b24950ea29e73c8f
[INFO] running `Command { std: "docker" "start" "-a" "74eb388d04d7dfa97b59d1d08964125c0e76320d4e494754b24950ea29e73c8f", kill_on_drop: false }`
[INFO] [stderr]    Compiling traits v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `return_summarizable`
[INFO] [stdout]   --> src/lib.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn return_summarizable() -> impl Summary {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` 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 0.64s
[INFO] running `Command { std: "docker" "inspect" "74eb388d04d7dfa97b59d1d08964125c0e76320d4e494754b24950ea29e73c8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74eb388d04d7dfa97b59d1d08964125c0e76320d4e494754b24950ea29e73c8f", kill_on_drop: false }`
[INFO] [stdout] 74eb388d04d7dfa97b59d1d08964125c0e76320d4e494754b24950ea29e73c8f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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] 9667cde8f23fb3d393f0820f37ebbc477828a8b6897d316623f55da5325923b4
[INFO] running `Command { std: "docker" "start" "-a" "9667cde8f23fb3d393f0820f37ebbc477828a8b6897d316623f55da5325923b4", kill_on_drop: false }`
[INFO] [stdout] warning: function is never used: `return_summarizable`
[INFO] [stdout]   --> src/lib.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn return_summarizable() -> impl Summary {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling traits v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `return_summarizable`
[INFO] [stdout]   --> src/lib.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn return_summarizable() -> impl Summary {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` 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 0.31s
[INFO] running `Command { std: "docker" "inspect" "9667cde8f23fb3d393f0820f37ebbc477828a8b6897d316623f55da5325923b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9667cde8f23fb3d393f0820f37ebbc477828a8b6897d316623f55da5325923b4", kill_on_drop: false }`
[INFO] [stdout] 9667cde8f23fb3d393f0820f37ebbc477828a8b6897d316623f55da5325923b4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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] f89addec9f6303ddfed29d92f561e985fad4aa2037042d33efb3c06f732f2ad7
[INFO] running `Command { std: "docker" "start" "-a" "f89addec9f6303ddfed29d92f561e985fad4aa2037042d33efb3c06f732f2ad7", kill_on_drop: false }`
[INFO] [stderr] warning: function is never used: `return_summarizable`
[INFO] [stderr]   --> src/lib.rs:72:4
[INFO] [stderr]    |
[INFO] [stderr] 72 | fn return_summarizable() -> impl Summary {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `traits` (lib) generated 1 warning
[INFO] [stderr] warning: `traits` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/traits-1a5ddeb1fce38fe7)
[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] [stderr]    Doc-tests traits
[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" "f89addec9f6303ddfed29d92f561e985fad4aa2037042d33efb3c06f732f2ad7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f89addec9f6303ddfed29d92f561e985fad4aa2037042d33efb3c06f732f2ad7", kill_on_drop: false }`
[INFO] [stdout] f89addec9f6303ddfed29d92f561e985fad4aa2037042d33efb3c06f732f2ad7