[INFO] cloning repository https://github.com/swordsmanluke/countdown
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/swordsmanluke/countdown" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswordsmanluke%2Fcountdown", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswordsmanluke%2Fcountdown'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5ce2ed9cc8fcbd4e0990fefe5a4f2d28f3aaa578
[INFO] testing swordsmanluke/countdown against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswordsmanluke%2Fcountdown" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/swordsmanluke/countdown
[INFO] finished tweaking git repo https://github.com/swordsmanluke/countdown
[INFO] tweaked toml for git repo https://github.com/swordsmanluke/countdown written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/swordsmanluke/countdown on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/swordsmanluke/countdown already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0ffcd3e343efeaaf7fa50ae56a47f81d0f81e4a7d889249571e4a973b0c4d2af
[INFO] running `Command { std: "docker" "start" "-a" "0ffcd3e343efeaaf7fa50ae56a47f81d0f81e4a7d889249571e4a973b0c4d2af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0ffcd3e343efeaaf7fa50ae56a47f81d0f81e4a7d889249571e4a973b0c4d2af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ffcd3e343efeaaf7fa50ae56a47f81d0f81e4a7d889249571e4a973b0c4d2af", kill_on_drop: false }`
[INFO] [stdout] 0ffcd3e343efeaaf7fa50ae56a47f81d0f81e4a7d889249571e4a973b0c4d2af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bec4204e90d5c55948eaa7daaca009c7ebcab589d72c94db42ea1a8443b42b2c
[INFO] running `Command { std: "docker" "start" "-a" "bec4204e90d5c55948eaa7daaca009c7ebcab589d72c94db42ea1a8443b42b2c", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling regex-syntax v0.6.18
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling aho-corasick v0.7.13
[INFO] [stderr]    Compiling regex v1.3.9
[INFO] [stderr]    Compiling countdown v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `timers` is never used
[INFO] [stdout]    --> src/countdown.rs:131:12
[INFO] [stdout]     |
[INFO] [stdout] 119 | impl Counterdowner {
[INFO] [stdout]     | ------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 131 |     pub fn timers(&mut self) -> Vec<String> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `NotFound` and `SaveError` are never constructed
[INFO] [stdout]  --> src/countdown/countdown_serializer.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub enum CountdownError {
[INFO] [stdout]   |          -------------- variants in this enum
[INFO] [stdout] 8 |     NotFound(String),
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 9 |     SaveError(String),
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `CountdownError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.21s
[INFO] running `Command { std: "docker" "inspect" "bec4204e90d5c55948eaa7daaca009c7ebcab589d72c94db42ea1a8443b42b2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bec4204e90d5c55948eaa7daaca009c7ebcab589d72c94db42ea1a8443b42b2c", kill_on_drop: false }`
[INFO] [stdout] bec4204e90d5c55948eaa7daaca009c7ebcab589d72c94db42ea1a8443b42b2c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca08c9510f9fc6d506c94a7d7459e58b3adf333d7598fc656dc2fefd903918fb
[INFO] running `Command { std: "docker" "start" "-a" "ca08c9510f9fc6d506c94a7d7459e58b3adf333d7598fc656dc2fefd903918fb", kill_on_drop: false }`
[INFO] [stderr]    Compiling countdown v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `SaveError` is never constructed
[INFO] [stdout]  --> src/countdown/countdown_serializer.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub enum CountdownError {
[INFO] [stdout]   |          -------------- variant in this enum
[INFO] [stdout] 8 |     NotFound(String),
[INFO] [stdout] 9 |     SaveError(String),
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `CountdownError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/countdown.rs:230:9
[INFO] [stdout]     |
[INFO] [stdout] 230 |         ctr.add_timer(name, duration);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 230 |         let _ = ctr.add_timer(name, duration);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/countdown.rs:241:9
[INFO] [stdout]     |
[INFO] [stdout] 241 |         ctr.add_timer(name, duration);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 241 |         let _ = ctr.add_timer(name, duration);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/countdown.rs:244:9
[INFO] [stdout]     |
[INFO] [stdout] 244 |         ctr.cancel_timer(name);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 244 |         let _ = ctr.cancel_timer(name);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/countdown.rs:254:9
[INFO] [stdout]     |
[INFO] [stdout] 254 |         ctr.add_timer(name, duration);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 254 |         let _ = ctr.add_timer(name, duration);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.66s
[INFO] running `Command { std: "docker" "inspect" "ca08c9510f9fc6d506c94a7d7459e58b3adf333d7598fc656dc2fefd903918fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca08c9510f9fc6d506c94a7d7459e58b3adf333d7598fc656dc2fefd903918fb", kill_on_drop: false }`
[INFO] [stdout] ca08c9510f9fc6d506c94a7d7459e58b3adf333d7598fc656dc2fefd903918fb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2d7e7bbd3fed9d68f65142480ace7bc4ffd78a1d0ad768ff8a2ddb2d3536da80
[INFO] running `Command { std: "docker" "start" "-a" "2d7e7bbd3fed9d68f65142480ace7bc4ffd78a1d0ad768ff8a2ddb2d3536da80", kill_on_drop: false }`
[INFO] [stderr] warning: variant `SaveError` is never constructed
[INFO] [stderr]  --> src/countdown/countdown_serializer.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub enum CountdownError {
[INFO] [stderr]   |          -------------- variant in this enum
[INFO] [stderr] 8 |     NotFound(String),
[INFO] [stderr] 9 |     SaveError(String),
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `CountdownError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/countdown.rs:230:9
[INFO] [stderr]     |
[INFO] [stderr] 230 |         ctr.add_timer(name, duration);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 230 |         let _ = ctr.add_timer(name, duration);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/countdown.rs:241:9
[INFO] [stderr]     |
[INFO] [stderr] 241 |         ctr.add_timer(name, duration);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 241 |         let _ = ctr.add_timer(name, duration);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/countdown.rs:244:9
[INFO] [stderr]     |
[INFO] [stderr] 244 |         ctr.cancel_timer(name);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 244 |         let _ = ctr.cancel_timer(name);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/countdown.rs:254:9
[INFO] [stderr]     |
[INFO] [stderr] 254 |         ctr.add_timer(name, duration);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 254 |         let _ = ctr.add_timer(name, duration);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `countdown` (bin "countdown" test) generated 5 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/countdown-8c943a3ddd870888)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test countdown::tests::count_down_calculates_correct_remaining_time ... ok
[INFO] [stdout] test countdown::tests::count_down_returns_zero_if_past_time ... ok
[INFO] [stdout] test countdown::tests::cancel_removes_created_countdown ... ok
[INFO] [stdout] test countdown::tests::add_new_creates_a_new_countdown ... ok
[INFO] [stdout] test countdown::tests::display_prints_out_timers ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2d7e7bbd3fed9d68f65142480ace7bc4ffd78a1d0ad768ff8a2ddb2d3536da80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d7e7bbd3fed9d68f65142480ace7bc4ffd78a1d0ad768ff8a2ddb2d3536da80", kill_on_drop: false }`
[INFO] [stdout] 2d7e7bbd3fed9d68f65142480ace7bc4ffd78a1d0ad768ff8a2ddb2d3536da80