[INFO] cloning repository https://github.com/study-rust/ownership-and-slices
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/study-rust/ownership-and-slices" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstudy-rust%2Fownership-and-slices", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstudy-rust%2Fownership-and-slices'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8611c00fd43fd65dc53c1338eded9f4086923e81
[INFO] testing study-rust/ownership-and-slices against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstudy-rust%2Fownership-and-slices" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/study-rust/ownership-and-slices on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/study-rust/ownership-and-slices
[INFO] finished tweaking git repo https://github.com/study-rust/ownership-and-slices
[INFO] tweaked toml for git repo https://github.com/study-rust/ownership-and-slices written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/study-rust/ownership-and-slices already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eeb353a23171b0d2db40845afb556fb0e3a84cd4fce827fb9d838e8e1af1b42c
[INFO] running `Command { std: "docker" "start" "-a" "eeb353a23171b0d2db40845afb556fb0e3a84cd4fce827fb9d838e8e1af1b42c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eeb353a23171b0d2db40845afb556fb0e3a84cd4fce827fb9d838e8e1af1b42c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eeb353a23171b0d2db40845afb556fb0e3a84cd4fce827fb9d838e8e1af1b42c", kill_on_drop: false }`
[INFO] [stdout] eeb353a23171b0d2db40845afb556fb0e3a84cd4fce827fb9d838e8e1af1b42c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 11ff956ced1d1fd02768666529a6564b47749a79311bdcf70fa75fba40a662a2
[INFO] running `Command { std: "docker" "start" "-a" "11ff956ced1d1fd02768666529a6564b47749a79311bdcf70fa75fba40a662a2", kill_on_drop: false }`
[INFO] [stderr]    Compiling understanding-ownership v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.54s
[INFO] running `Command { std: "docker" "inspect" "11ff956ced1d1fd02768666529a6564b47749a79311bdcf70fa75fba40a662a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11ff956ced1d1fd02768666529a6564b47749a79311bdcf70fa75fba40a662a2", kill_on_drop: false }`
[INFO] [stdout] 11ff956ced1d1fd02768666529a6564b47749a79311bdcf70fa75fba40a662a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f312d3dc21446d5951adc4d6f791e4b19fc1e0a11d1a8d9720a6d7c38d7bf224
[INFO] running `Command { std: "docker" "start" "-a" "f312d3dc21446d5951adc4d6f791e4b19fc1e0a11d1a8d9720a6d7c38d7bf224", kill_on_drop: false }`
[INFO] [stderr]    Compiling understanding-ownership v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `Command { std: "docker" "inspect" "f312d3dc21446d5951adc4d6f791e4b19fc1e0a11d1a8d9720a6d7c38d7bf224", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f312d3dc21446d5951adc4d6f791e4b19fc1e0a11d1a8d9720a6d7c38d7bf224", kill_on_drop: false }`
[INFO] [stdout] f312d3dc21446d5951adc4d6f791e4b19fc1e0a11d1a8d9720a6d7c38d7bf224
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 78b66da30bf44cb28369ba71c0fe4f847fd62b294536e840eb485a1fa21bf3a1
[INFO] running `Command { std: "docker" "start" "-a" "78b66da30bf44cb28369ba71c0fe4f847fd62b294536e840eb485a1fa21bf3a1", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 6.69s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/understanding_ownership-a26183f9e700fada)
[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" "78b66da30bf44cb28369ba71c0fe4f847fd62b294536e840eb485a1fa21bf3a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78b66da30bf44cb28369ba71c0fe4f847fd62b294536e840eb485a1fa21bf3a1", kill_on_drop: false }`
[INFO] [stdout] 78b66da30bf44cb28369ba71c0fe4f847fd62b294536e840eb485a1fa21bf3a1