[INFO] cloning repository https://github.com/rektdeckard/rust-concepts
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rektdeckard/rust-concepts" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frektdeckard%2Frust-concepts", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frektdeckard%2Frust-concepts'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b3919b8ce65f6ae0483cbf3a0bcb08825818624e
[INFO] testing rektdeckard/rust-concepts against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frektdeckard%2Frust-concepts" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rektdeckard/rust-concepts on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rektdeckard/rust-concepts
[INFO] finished tweaking git repo https://github.com/rektdeckard/rust-concepts
[INFO] tweaked toml for git repo https://github.com/rektdeckard/rust-concepts written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/rektdeckard/rust-concepts already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cedd65b56149e70b7b8eaa7bb48a5546dfe99c79e29755dde7a57d9c879622d3
[INFO] running `Command { std: "docker" "start" "-a" "cedd65b56149e70b7b8eaa7bb48a5546dfe99c79e29755dde7a57d9c879622d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cedd65b56149e70b7b8eaa7bb48a5546dfe99c79e29755dde7a57d9c879622d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cedd65b56149e70b7b8eaa7bb48a5546dfe99c79e29755dde7a57d9c879622d3", kill_on_drop: false }`
[INFO] [stdout] cedd65b56149e70b7b8eaa7bb48a5546dfe99c79e29755dde7a57d9c879622d3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d9fe39f9e6cf3f2a61f2e4d8b69ab92cefa045a906f747d4d0b5fefe84426343
[INFO] running `Command { std: "docker" "start" "-a" "d9fe39f9e6cf3f2a61f2e4d8b69ab92cefa045a906f747d4d0b5fefe84426343", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]    Compiling minigrep v0.1.0 (/opt/rustwide/workdir/minigrep)
[INFO] [stderr]    Compiling standard v0.1.0 (/opt/rustwide/workdir/standard)
[INFO] [stderr]    Compiling vector v0.1.0 (/opt/rustwide/workdir/vector)
[INFO] [stderr]    Compiling smart-pointers v0.1.0 (/opt/rustwide/workdir/smart-pointers)
[INFO] [stderr]    Compiling concurrency v0.1.0 (/opt/rustwide/workdir/concurrency)
[INFO] [stderr]    Compiling linked-list v0.1.0 (/opt/rustwide/workdir/linked-list)
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling traits v0.1.0 (/opt/rustwide/workdir/traits)
[INFO] [stdout] warning: field is never read: `celcius`
[INFO] [stdout]  --> traits/src/convert.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     celcius: f64,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> traits/src/convert.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn new(celcius: f64) -> Temperature {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `in_fahrenheit`
[INFO] [stdout]   --> traits/src/convert.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn in_fahrenheit(&self) -> f64 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `in_celcius`
[INFO] [stdout]   --> traits/src/convert.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn in_celcius(&self) -> f64 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `in_kelvin`
[INFO] [stdout]   --> traits/src/convert.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn in_kelvin(&self) -> f64 {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.93s
[INFO] running `Command { std: "docker" "inspect" "d9fe39f9e6cf3f2a61f2e4d8b69ab92cefa045a906f747d4d0b5fefe84426343", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9fe39f9e6cf3f2a61f2e4d8b69ab92cefa045a906f747d4d0b5fefe84426343", kill_on_drop: false }`
[INFO] [stdout] d9fe39f9e6cf3f2a61f2e4d8b69ab92cefa045a906f747d4d0b5fefe84426343
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c11d6cec2d405d3db70e6b53b1e2ab62c3c102c8e2bfeb50aeb440f4e2f448df
[INFO] running `Command { std: "docker" "start" "-a" "c11d6cec2d405d3db70e6b53b1e2ab62c3c102c8e2bfeb50aeb440f4e2f448df", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling linked-list v0.1.0 (/opt/rustwide/workdir/linked-list)
[INFO] [stderr]    Compiling standard v0.1.0 (/opt/rustwide/workdir/standard)
[INFO] [stderr]    Compiling smart-pointers v0.1.0 (/opt/rustwide/workdir/smart-pointers)
[INFO] [stderr]    Compiling vector v0.1.0 (/opt/rustwide/workdir/vector)
[INFO] [stderr]    Compiling concurrency v0.1.0 (/opt/rustwide/workdir/concurrency)
[INFO] [stderr]    Compiling minigrep v0.1.0 (/opt/rustwide/workdir/minigrep)
[INFO] [stderr]    Compiling traits v0.1.0 (/opt/rustwide/workdir/traits)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.58s
[INFO] running `Command { std: "docker" "inspect" "c11d6cec2d405d3db70e6b53b1e2ab62c3c102c8e2bfeb50aeb440f4e2f448df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c11d6cec2d405d3db70e6b53b1e2ab62c3c102c8e2bfeb50aeb440f4e2f448df", kill_on_drop: false }`
[INFO] [stdout] c11d6cec2d405d3db70e6b53b1e2ab62c3c102c8e2bfeb50aeb440f4e2f448df
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5e4fcd5331ddcdad9055372ec23a99a82e6daa09368140546cf6ece04ee18cbb
[INFO] running `Command { std: "docker" "start" "-a" "5e4fcd5331ddcdad9055372ec23a99a82e6daa09368140546cf6ece04ee18cbb", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/concurrency-1546fdbaae93ab18)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test tests::message_passing ... ok
[INFO] [stdout] test tests::move_closures ... ok
[INFO] [stdout] test tests::shared_state_with_mutex ... ok
[INFO] [stdout] test tests::wait_on_threads_with_join_handles ... ok
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/linked_list-9de25f21d3b9b11f)
[INFO] [stdout] test tests::multiple_messages_and_producers ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 4.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] test tests::constructor_works ... ok
[INFO] [stdout] test tests::can_pop ... ok
[INFO] [stdout] test tests::can_peek ... ok
[INFO] [stdout] test tests::can_push ... ok
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/minigrep-4fc9597357905f8d)
[INFO] [stdout] test tests::push_and_pop ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test tests::case_sensitive_search ... ok
[INFO] [stdout] test tests::config_constructor_works ... ok
[INFO] [stdout] test tests::run_fails_with_bad_file ... ok
[INFO] [stdout] test tests::case_insensitive_search ... ok
[INFO] [stdout] test tests::config_constructor_fails_with_bad_args ... ok
[INFO] [stdout] test tests::run_can_read_file ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/minigrep-d52a78e45020c718)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/smart_pointers-176d8a43887655a5)
[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] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test tests::multiple_ownership_with_refcell_and_rc ... ok
[INFO] [stdout] test tests::interior_mutability ... ok
[INFO] [stdout] test tests::implementing_drop ... ok
[INFO] [stdout] test tests::box_dereferencing ... ok
[INFO] [stdout] test tests::custom_box_with_deref_coercion ... ok
[INFO] [stdout] test tests::ref_counts ... ok
[INFO] [stdout] test tests::recursive_type_with_box ... ok
[INFO] [stdout] test tests::tree_with_weak_refs ... ok
[INFO] [stdout] test tests::reference_cycle_memory_leak ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/standard-b05cc1972ae42db2)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/traits-1a79a7d6a052e0f4)
[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] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test convert::tests::in_kelvin ... ok
[INFO] [stdout] test convert::tests::temp_from_constructor ... ok
[INFO] [stdout] test convert::tests::temp_from_fahreneheit_string ... ok
[INFO] [stdout] test convert::tests::in_celcius ... ok
[INFO] [stdout] test convert::tests::default_temp_from_bad_string ... ok
[INFO] [stdout] test convert::tests::in_fahrenheit ... ok
[INFO] [stdout] test convert::tests::temp_from_string ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/vector-d6e42fe4e29d20f4)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests linked-list
[INFO] [stdout] running 1 test
[INFO] [stdout] test vector::tests::is_formattable ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests minigrep
[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] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]    Doc-tests smart-pointers
[INFO] [stdout] test src/lib.rs - Config (line 20) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.41s
[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" "5e4fcd5331ddcdad9055372ec23a99a82e6daa09368140546cf6ece04ee18cbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e4fcd5331ddcdad9055372ec23a99a82e6daa09368140546cf6ece04ee18cbb", kill_on_drop: false }`
[INFO] [stdout] 5e4fcd5331ddcdad9055372ec23a99a82e6daa09368140546cf6ece04ee18cbb