[INFO] cloning repository https://github.com/hjr3/building-better-interfaces
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hjr3/building-better-interfaces" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhjr3%2Fbuilding-better-interfaces", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhjr3%2Fbuilding-better-interfaces'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4d30913d5f3230f435fed75e13571d4164d6b5d3
[INFO] testing hjr3/building-better-interfaces against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhjr3%2Fbuilding-better-interfaces" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hjr3/building-better-interfaces 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/hjr3/building-better-interfaces
[INFO] finished tweaking git repo https://github.com/hjr3/building-better-interfaces
[INFO] tweaked toml for git repo https://github.com/hjr3/building-better-interfaces written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/hjr3/building-better-interfaces 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] [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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] d0b9640b31662f32af479f91f4c0e8539b8a73484f0b691acc93119b5bc07950
[INFO] running `Command { std: "docker" "start" "-a" "d0b9640b31662f32af479f91f4c0e8539b8a73484f0b691acc93119b5bc07950", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0b9640b31662f32af479f91f4c0e8539b8a73484f0b691acc93119b5bc07950", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0b9640b31662f32af479f91f4c0e8539b8a73484f0b691acc93119b5bc07950", kill_on_drop: false }`
[INFO] [stdout] d0b9640b31662f32af479f91f4c0e8539b8a73484f0b691acc93119b5bc07950
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 67dbc62d0f8c3733198a7da4c700aeab3bbd01089ceb8edfba2259daf599b65a
[INFO] running `Command { std: "docker" "start" "-a" "67dbc62d0f8c3733198a7da4c700aeab3bbd01089ceb8edfba2259daf599b65a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling building-better-interfaces v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]    --> src/name.rs:191:17
[INFO] [stdout]     |
[INFO] [stdout] 191 |     fn try_from(T) -> Result<Self, Self::Err> where Self: Sized;
[INFO] [stdout]     |                 ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]     = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.25s
[INFO] running `Command { std: "docker" "inspect" "67dbc62d0f8c3733198a7da4c700aeab3bbd01089ceb8edfba2259daf599b65a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67dbc62d0f8c3733198a7da4c700aeab3bbd01089ceb8edfba2259daf599b65a", kill_on_drop: false }`
[INFO] [stdout] 67dbc62d0f8c3733198a7da4c700aeab3bbd01089ceb8edfba2259daf599b65a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] dc0296702ecbfeebe80028f8dc8d50c63e76eddd4cd3ee9dd3e43bbbaa87889f
[INFO] running `Command { std: "docker" "start" "-a" "dc0296702ecbfeebe80028f8dc8d50c63e76eddd4cd3ee9dd3e43bbbaa87889f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling building-better-interfaces v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]    --> src/name.rs:191:17
[INFO] [stdout]     |
[INFO] [stdout] 191 |     fn try_from(T) -> Result<Self, Self::Err> where Self: Sized;
[INFO] [stdout]     |                 ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]     = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]    --> src/name.rs:191:17
[INFO] [stdout]     |
[INFO] [stdout] 191 |     fn try_from(T) -> Result<Self, Self::Err> where Self: Sized;
[INFO] [stdout]     |                 ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]     = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.39s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "dc0296702ecbfeebe80028f8dc8d50c63e76eddd4cd3ee9dd3e43bbbaa87889f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc0296702ecbfeebe80028f8dc8d50c63e76eddd4cd3ee9dd3e43bbbaa87889f", kill_on_drop: false }`
[INFO] [stdout] dc0296702ecbfeebe80028f8dc8d50c63e76eddd4cd3ee9dd3e43bbbaa87889f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 52e899d2e8733b55687a3c966228ad478af63c4525bc0b8c5849ee8b6057760d
[INFO] running `Command { std: "docker" "start" "-a" "52e899d2e8733b55687a3c966228ad478af63c4525bc0b8c5849ee8b6057760d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stderr]    --> src/name.rs:191:17
[INFO] [stderr]     |
[INFO] [stderr] 191 |     fn try_from(T) -> Result<Self, Self::Err> where Self: Sized;
[INFO] [stderr]     |                 ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stderr]     = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stderr] 
[INFO] [stderr] warning: `building-better-interfaces` (lib) generated 1 warning
[INFO] [stderr] warning: `building-better-interfaces` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.16s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/building_better_interfaces-1a8e26ee676b5ae9)
[INFO] [stdout] 
[INFO] [stdout] running 41 tests
[INFO] [stdout] test classroom::test::test_classroom_add_student ... ok
[INFO] [stdout] test courses::tests::test_courses_add_course ... ok
[INFO] [stdout] test name::tests::string_into_name_string ... ok
[INFO] [stdout] test classroom::test::test_classroom_add_student_fails ... ok
[INFO] [stdout] test name::tests::test_name_cow ... ok
[INFO] [stdout] test name::tests::test_name_str_as_mut ... ok
[INFO] [stdout] test name::tests::test_name_str_as_ref ... ok
[INFO] [stdout] test name::tests::test_name_str_family ... ok
[INFO] [stdout] test name::tests::test_name_str_given ... ok
[INFO] [stdout] test name::tests::test_name_str_into ... ok
[INFO] [stdout] test name::tests::test_name_str_into_name_string ... ok
[INFO] [stdout] test name::tests::test_name_str_to_name_string ... ok
[INFO] [stdout] test name::tests::test_name_str_to_owned ... ok
[INFO] [stdout] test name::tests::test_name_str_to_string ... ok
[INFO] [stdout] test name::tests::test_name_str_to_uppercase ... ok
[INFO] [stdout] test name::tests::test_name_str_try_into_err ... ok
[INFO] [stdout] test name::tests::test_name_str_try_into_ok ... ok
[INFO] [stdout] test name::tests::test_name_string_as_mut ... ok
[INFO] [stdout] test name::tests::test_name_string_as_mut_name_str ... ok
[INFO] [stdout] test name::tests::test_name_string_as_mut_str ... ok
[INFO] [stdout] test name::tests::test_name_string_as_name_str ... ok
[INFO] [stdout] test name::tests::test_name_string_as_ref ... ok
[INFO] [stdout] test name::tests::test_name_string_as_str ... ok
[INFO] [stdout] test name::tests::test_name_string_borrow ... ok
[INFO] [stdout] test name::tests::test_name_string_borrow_mut ... ok
[INFO] [stdout] test name::tests::test_name_string_deref ... ok
[INFO] [stdout] test name::tests::test_name_string_deref_mut ... ok
[INFO] [stdout] test name::tests::test_name_string_from_name_str ... ok
[INFO] [stdout] test name::tests::test_name_string_from_str ... ok
[INFO] [stdout] test name::tests::test_name_string_from_string ... ok
[INFO] [stdout] test name::tests::test_name_string_into ... ok
[INFO] [stdout] test name::tests::test_name_string_into_string ... ok
[INFO] [stdout] test name::tests::test_name_string_push ... ok
[INFO] [stdout] test name::tests::test_name_string_uppercase ... ok
[INFO] [stdout] test name::tests::test_name_try_from_err ... ok
[INFO] [stdout] test name::tests::test_name_try_from_ok ... ok
[INFO] [stdout] test person::tests::test_person_new ... ok
[INFO] [stdout] test roster::tests::test_roster_add_name ... ok
[INFO] [stdout] test student::tests::test_in_class_deref_name_str ... ok
[INFO] [stdout] test student::tests::test_student_deref_name_str ... ok
[INFO] [stdout] test student::tests::test_student_state_changes ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 41 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests building-better-interfaces
[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" "52e899d2e8733b55687a3c966228ad478af63c4525bc0b8c5849ee8b6057760d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52e899d2e8733b55687a3c966228ad478af63c4525bc0b8c5849ee8b6057760d", kill_on_drop: false }`
[INFO] [stdout] 52e899d2e8733b55687a3c966228ad478af63c4525bc0b8c5849ee8b6057760d