[INFO] cloning repository https://github.com/Leaves333/rtimer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Leaves333/rtimer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLeaves333%2Frtimer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLeaves333%2Frtimer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d3fce40fc419416f61761ecb61258ec268564f03
[INFO] checking Leaves333/rtimer against master#7ad4e69ad585d8ff214f7b42d01f1959eda08f40 for pr-152543
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLeaves333%2Frtimer" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Leaves333/rtimer
[INFO] finished tweaking git repo https://github.com/Leaves333/rtimer
[INFO] tweaked toml for git repo https://github.com/Leaves333/rtimer written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Leaves333/rtimer on toolchain 7ad4e69ad585d8ff214f7b42d01f1959eda08f40
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7ad4e69ad585d8ff214f7b42d01f1959eda08f40" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Leaves333/rtimer 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" "+7ad4e69ad585d8ff214f7b42d01f1959eda08f40" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stderr]     Blocking waiting for file lock on package cache
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[INFO] [stderr]   Downloaded mac-notification-sys v0.6.8
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+7ad4e69ad585d8ff214f7b42d01f1959eda08f40" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 40c1c16f670b63d53e3508efdc293040516862182deb0fad821e80f334f06bbd
[INFO] running `Command { std: "docker" "start" "-a" "40c1c16f670b63d53e3508efdc293040516862182deb0fad821e80f334f06bbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "40c1c16f670b63d53e3508efdc293040516862182deb0fad821e80f334f06bbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40c1c16f670b63d53e3508efdc293040516862182deb0fad821e80f334f06bbd", kill_on_drop: false }`
[INFO] [stdout] 40c1c16f670b63d53e3508efdc293040516862182deb0fad821e80f334f06bbd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+7ad4e69ad585d8ff214f7b42d01f1959eda08f40" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d8ebe0156ffbf2e45233f5a6cfd604b25c92b503720f1fe7f6aa061138a7163b
[INFO] running `Command { std: "docker" "start" "-a" "d8ebe0156ffbf2e45233f5a6cfd604b25c92b503720f1fe7f6aa061138a7163b", kill_on_drop: false }`
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[INFO] [stdout] warning: unused variable: `filename`
[INFO] [stdout]   --> src/timer.rs:30:24
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn timer_from_file(filename: &str) -> Timer {
[INFO] [stdout]    |                        ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_filename`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `filename`
[INFO] [stdout]   --> src/timer.rs:30:24
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn timer_from_file(filename: &str) -> Timer {
[INFO] [stdout]    |                        ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_filename`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Timer` is never constructed
[INFO] [stdout]  --> src/timer.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Timer {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Timer` is never constructed
[INFO] [stdout]  --> src/timer.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Timer {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `duration` is never used
[INFO] [stdout]   --> src/timer.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Timer {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] 12 |     pub fn duration(&self) -> u64 {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `duration` is never used
[INFO] [stdout]   --> src/timer.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Timer {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] 12 |     pub fn duration(&self) -> u64 {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serialize_to_file` is never used
[INFO] [stdout]   --> src/timer.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn serialize_to_file(timer: Timer, filename: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serialize_to_file` is never used
[INFO] [stdout]   --> src/timer.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn serialize_to_file(timer: Timer, filename: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `timer_from_file` is never used
[INFO] [stdout]   --> src/timer.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn timer_from_file(filename: &str) -> Timer {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `timer_from_file` is never used
[INFO] [stdout]   --> src/timer.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn timer_from_file(filename: &str) -> Timer {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 46.46s
[INFO] running `Command { std: "docker" "inspect" "d8ebe0156ffbf2e45233f5a6cfd604b25c92b503720f1fe7f6aa061138a7163b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8ebe0156ffbf2e45233f5a6cfd604b25c92b503720f1fe7f6aa061138a7163b", kill_on_drop: false }`
[INFO] [stdout] d8ebe0156ffbf2e45233f5a6cfd604b25c92b503720f1fe7f6aa061138a7163b