[INFO] cloning repository https://github.com/idebugger-learning/advent-of-code-2018-day4
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/idebugger-learning/advent-of-code-2018-day4" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fidebugger-learning%2Fadvent-of-code-2018-day4", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fidebugger-learning%2Fadvent-of-code-2018-day4'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 38a00dc4506728442d236205da1e315c7e11a8eb
[INFO] checking idebugger-learning/advent-of-code-2018-day4 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fidebugger-learning%2Fadvent-of-code-2018-day4" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/idebugger-learning/advent-of-code-2018-day4 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/idebugger-learning/advent-of-code-2018-day4
[INFO] finished tweaking git repo https://github.com/idebugger-learning/advent-of-code-2018-day4
[INFO] tweaked toml for git repo https://github.com/idebugger-learning/advent-of-code-2018-day4 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/idebugger-learning/advent-of-code-2018-day4 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e15a53ac5eff7b117d50d1bf255eea65d4ad2d278b8399b36cd35049c036e625
[INFO] running `Command { std: "docker" "start" "-a" "e15a53ac5eff7b117d50d1bf255eea65d4ad2d278b8399b36cd35049c036e625", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e15a53ac5eff7b117d50d1bf255eea65d4ad2d278b8399b36cd35049c036e625", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e15a53ac5eff7b117d50d1bf255eea65d4ad2d278b8399b36cd35049c036e625", kill_on_drop: false }`
[INFO] [stdout] e15a53ac5eff7b117d50d1bf255eea65d4ad2d278b8399b36cd35049c036e625
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f39e694de0b0e487abb892ee8a6fe940d6e5764f2a433af43e5885396a216a8b
[INFO] running `Command { std: "docker" "start" "-a" "f39e694de0b0e487abb892ee8a6fe940d6e5764f2a433af43e5885396a216a8b", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking either v1.7.0
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]     Checking nom v7.1.1
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking day4 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&NaiveDate` instead of cloning the inner type
[INFO] [stdout]   --> src/main.rs:99:80
[INFO] [stdout]    |
[INFO] [stdout] 99 |     for (date, schedule) in calendar.into_iter().sorted_by_key(|(date, _)| date.clone()) {
[INFO] [stdout]    |                                                                                ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&NaiveDate` instead of cloning the inner type
[INFO] [stdout]   --> src/main.rs:99:80
[INFO] [stdout]    |
[INFO] [stdout] 99 |     for (date, schedule) in calendar.into_iter().sorted_by_key(|(date, _)| date.clone()) {
[INFO] [stdout]    |                                                                                ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.36s
[INFO] running `Command { std: "docker" "inspect" "f39e694de0b0e487abb892ee8a6fe940d6e5764f2a433af43e5885396a216a8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f39e694de0b0e487abb892ee8a6fe940d6e5764f2a433af43e5885396a216a8b", kill_on_drop: false }`
[INFO] [stdout] f39e694de0b0e487abb892ee8a6fe940d6e5764f2a433af43e5885396a216a8b
[INFO] checking idebugger-learning/advent-of-code-2018-day4 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fidebugger-learning%2Fadvent-of-code-2018-day4" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/idebugger-learning/advent-of-code-2018-day4 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/idebugger-learning/advent-of-code-2018-day4
[INFO] finished tweaking git repo https://github.com/idebugger-learning/advent-of-code-2018-day4
[INFO] tweaked toml for git repo https://github.com/idebugger-learning/advent-of-code-2018-day4 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/idebugger-learning/advent-of-code-2018-day4 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c76f4009e7bc202e5abe7cca5325fff9e0edda630ff734b33fc5ed0367ec0bae
[INFO] running `Command { std: "docker" "start" "-a" "c76f4009e7bc202e5abe7cca5325fff9e0edda630ff734b33fc5ed0367ec0bae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c76f4009e7bc202e5abe7cca5325fff9e0edda630ff734b33fc5ed0367ec0bae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c76f4009e7bc202e5abe7cca5325fff9e0edda630ff734b33fc5ed0367ec0bae", kill_on_drop: false }`
[INFO] [stdout] c76f4009e7bc202e5abe7cca5325fff9e0edda630ff734b33fc5ed0367ec0bae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b0e8d17b9879bf1d9704edc1f5b038288ef1446e8b48c1f5ee61fd9774a035ff
[INFO] running `Command { std: "docker" "start" "-a" "b0e8d17b9879bf1d9704edc1f5b038288ef1446e8b48c1f5ee61fd9774a035ff", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking either v1.7.0
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking nom v7.1.1
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking day4 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&NaiveDate` instead of cloning the inner type
[INFO] [stdout]   --> src/main.rs:99:80
[INFO] [stdout]    |
[INFO] [stdout] 99 |     for (date, schedule) in calendar.into_iter().sorted_by_key(|(date, _)| date.clone()) {
[INFO] [stdout]    |                                                                                ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&NaiveDate` instead of cloning the inner type
[INFO] [stdout]   --> src/main.rs:99:80
[INFO] [stdout]    |
[INFO] [stdout] 99 |     for (date, schedule) in calendar.into_iter().sorted_by_key(|(date, _)| date.clone()) {
[INFO] [stdout]    |                                                                                ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.84s
[INFO] running `Command { std: "docker" "inspect" "b0e8d17b9879bf1d9704edc1f5b038288ef1446e8b48c1f5ee61fd9774a035ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0e8d17b9879bf1d9704edc1f5b038288ef1446e8b48c1f5ee61fd9774a035ff", kill_on_drop: false }`
[INFO] [stdout] b0e8d17b9879bf1d9704edc1f5b038288ef1446e8b48c1f5ee61fd9774a035ff