[INFO] cloning repository https://github.com/FHTMitchell/fizzbuzz
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/FHTMitchell/fizzbuzz" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFHTMitchell%2Ffizzbuzz", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFHTMitchell%2Ffizzbuzz'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7b90a58bf5394baecab91799b909a086e82220e0
[INFO] testing FHTMitchell/fizzbuzz against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFHTMitchell%2Ffizzbuzz" "/workspace/builds/worker-55/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-55/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/FHTMitchell/fizzbuzz on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/FHTMitchell/fizzbuzz
[INFO] finished tweaking git repo https://github.com/FHTMitchell/fizzbuzz
[INFO] tweaked toml for git repo https://github.com/FHTMitchell/fizzbuzz written to /workspace/builds/worker-55/source/Cargo.toml
[INFO] crate git repo https://github.com/FHTMitchell/fizzbuzz already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "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-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8b99a77316ad3b1869ffdd70849fd92f7ea87622cf1bd811c5a1b267046c0dc6
[INFO] running `Command { std: "docker" "start" "-a" "8b99a77316ad3b1869ffdd70849fd92f7ea87622cf1bd811c5a1b267046c0dc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8b99a77316ad3b1869ffdd70849fd92f7ea87622cf1bd811c5a1b267046c0dc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b99a77316ad3b1869ffdd70849fd92f7ea87622cf1bd811c5a1b267046c0dc6", kill_on_drop: false }`
[INFO] [stdout] 8b99a77316ad3b1869ffdd70849fd92f7ea87622cf1bd811c5a1b267046c0dc6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b783ebc905abcd0484788442173028f37496d7e6ddc4a5960eae8537ecc92cf2
[INFO] running `Command { std: "docker" "start" "-a" "b783ebc905abcd0484788442173028f37496d7e6ddc4a5960eae8537ecc92cf2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling fizzbuzz v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `naive_to_buf`
[INFO] [stdout]   --> src/naive.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub fn naive_to_buf<W: Write>(w: &mut W, until: u64) -> io::Result<()> {
[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: `run_until`
[INFO] [stdout]    --> src/safe_opt.rs:153:8
[INFO] [stdout]     |
[INFO] [stdout] 153 |     fn run_until<W: io::Write>(mut self, writer: &mut W, until: u64) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `run_until`
[INFO] [stdout]    --> src/unsafe_opt.rs:157:8
[INFO] [stdout]     |
[INFO] [stdout] 157 |     fn run_until<W: Write>(mut self, writer: &mut W, until: u64) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 49.91s
[INFO] running `Command { std: "docker" "inspect" "b783ebc905abcd0484788442173028f37496d7e6ddc4a5960eae8537ecc92cf2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b783ebc905abcd0484788442173028f37496d7e6ddc4a5960eae8537ecc92cf2", kill_on_drop: false }`
[INFO] [stdout] b783ebc905abcd0484788442173028f37496d7e6ddc4a5960eae8537ecc92cf2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8321e71a31cdc92d6225cd4fb87b63c5f50a82064b8b86688c071dcc7d5a8a25
[INFO] running `Command { std: "docker" "start" "-a" "8321e71a31cdc92d6225cd4fb87b63c5f50a82064b8b86688c071dcc7d5a8a25", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling fizzbuzz v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `Command { std: "docker" "inspect" "8321e71a31cdc92d6225cd4fb87b63c5f50a82064b8b86688c071dcc7d5a8a25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8321e71a31cdc92d6225cd4fb87b63c5f50a82064b8b86688c071dcc7d5a8a25", kill_on_drop: false }`
[INFO] [stdout] 8321e71a31cdc92d6225cd4fb87b63c5f50a82064b8b86688c071dcc7d5a8a25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b7e5e40c7af1917ed52984f970d66aee19c4d6dc03475d27e408a8a0546cb2a5
[INFO] running `Command { std: "docker" "start" "-a" "b7e5e40c7af1917ed52984f970d66aee19c4d6dc03475d27e408a8a0546cb2a5", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/fizzbuzz-d7e8dbeb84f80623)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test unsafe_opt::tests::it_works ... ok
[INFO] [stdout] test safe_opt::tests::it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b7e5e40c7af1917ed52984f970d66aee19c4d6dc03475d27e408a8a0546cb2a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7e5e40c7af1917ed52984f970d66aee19c4d6dc03475d27e408a8a0546cb2a5", kill_on_drop: false }`
[INFO] [stdout] b7e5e40c7af1917ed52984f970d66aee19c4d6dc03475d27e408a8a0546cb2a5