[INFO] fetching crate school_library 1.0.3...
[INFO] testing school_library-1.0.3 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-1
[INFO] extracting crate school_library 1.0.3 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate school_library 1.0.3
[INFO] finished tweaking crates.io crate school_library 1.0.3
[INFO] tweaked toml for crates.io crate school_library 1.0.3 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate school_library 1.0.3 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 14 packages to latest compatible versions
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.10.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c58b8d3cce9080901979074c225719627736988304c4680259ea9ddc7d101324
[INFO] running `Command { std: "docker" "start" "-a" "c58b8d3cce9080901979074c225719627736988304c4680259ea9ddc7d101324", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c58b8d3cce9080901979074c225719627736988304c4680259ea9ddc7d101324", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c58b8d3cce9080901979074c225719627736988304c4680259ea9ddc7d101324", kill_on_drop: false }`
[INFO] [stdout] c58b8d3cce9080901979074c225719627736988304c4680259ea9ddc7d101324
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9e66542bc6b71468b4d622c48088708d5d4e84834e9aa4977f70cb0911280106
[INFO] running `Command { std: "docker" "start" "-a" "9e66542bc6b71468b4d622c48088708d5d4e84834e9aa4977f70cb0911280106", kill_on_drop: false }`
[INFO] [stderr]    Compiling school_library v1.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "9e66542bc6b71468b4d622c48088708d5d4e84834e9aa4977f70cb0911280106", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e66542bc6b71468b4d622c48088708d5d4e84834e9aa4977f70cb0911280106", kill_on_drop: false }`
[INFO] [stdout] 9e66542bc6b71468b4d622c48088708d5d4e84834e9aa4977f70cb0911280106
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aacc71b7615d8119567cd2021e1d2bbece3a6f9e7285e797754a719907dbc0a4
[INFO] running `Command { std: "docker" "start" "-a" "aacc71b7615d8119567cd2021e1d2bbece3a6f9e7285e797754a719907dbc0a4", kill_on_drop: false }`
[INFO] [stderr]    Compiling school_library v1.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "aacc71b7615d8119567cd2021e1d2bbece3a6f9e7285e797754a719907dbc0a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aacc71b7615d8119567cd2021e1d2bbece3a6f9e7285e797754a719907dbc0a4", kill_on_drop: false }`
[INFO] [stdout] aacc71b7615d8119567cd2021e1d2bbece3a6f9e7285e797754a719907dbc0a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6b660f3df35009b7f04ca3be85b862cc4f22acf296e022473b99a42bcecf0fae
[INFO] running `Command { std: "docker" "start" "-a" "6b660f3df35009b7f04ca3be85b862cc4f22acf296e022473b99a42bcecf0fae", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/school_library-715cff532860b8a4)
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test school::tests::test_add_student_to_class ... ok
[INFO] [stdout] test school::tests::test_class_average ... ok
[INFO] [stdout] test school::tests::test_get_best_class_with_empty_classes ... ok
[INFO] [stdout] test school::tests::test_get_best_class_with_multiple_classes ... ok
[INFO] [stdout] test school::tests::test_school_average_grades ... ok
[INFO] [stdout] test school::tests::test_class_creation ... ok
[INFO] [stdout] test school::tests::test_school_cloning ... ok
[INFO] [stdout] test school::tests::test_school_average_grades_with_students ... ok
[INFO] [stdout] test school::tests::test_get_best_class_with_empty_school ... ok
[INFO] [stdout] test school::tests::test_school_creation ... ok
[INFO] [stdout] test school::tests::test_get_best_class ... ok
[INFO] [stdout] test school::tests::test_student_creation ... ok
[INFO] [stdout] test school::tests::test_student_cloning ... ok
[INFO] [stdout] test school::tests::test_school_average_grades_with_multiple_students ... ok
[INFO] [stdout] test school::tests::test_class_cloning ... ok
[INFO] [stdout] test school::tests::test_add_class ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stderr]    Doc-tests school_library
[INFO] [stdout] 
[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" "6b660f3df35009b7f04ca3be85b862cc4f22acf296e022473b99a42bcecf0fae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b660f3df35009b7f04ca3be85b862cc4f22acf296e022473b99a42bcecf0fae", kill_on_drop: false }`
[INFO] [stdout] 6b660f3df35009b7f04ca3be85b862cc4f22acf296e022473b99a42bcecf0fae