[INFO] cloning repository https://github.com/apanloco/advent-of-code-2021
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/apanloco/advent-of-code-2021" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fapanloco%2Fadvent-of-code-2021", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fapanloco%2Fadvent-of-code-2021'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d35059bc6fe8f1d354b45ec0959061193f7a6c14
[INFO] checking apanloco/advent-of-code-2021 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fapanloco%2Fadvent-of-code-2021" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/apanloco/advent-of-code-2021 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/apanloco/advent-of-code-2021
[INFO] finished tweaking git repo https://github.com/apanloco/advent-of-code-2021
[INFO] tweaked toml for git repo https://github.com/apanloco/advent-of-code-2021 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/apanloco/advent-of-code-2021 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] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded scan_fmt v0.2.6
[INFO] [stderr]   Downloaded petgraph v0.6.0
[INFO] [stderr]   Downloaded pathfinding v3.0.5
[INFO] [stderr]   Downloaded permutator v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 72873eabb202eb3115cf1f6a7d2e820f4a277439a30eccf3096942d4ee234a6e
[INFO] running `Command { std: "docker" "start" "-a" "72873eabb202eb3115cf1f6a7d2e820f4a277439a30eccf3096942d4ee234a6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "72873eabb202eb3115cf1f6a7d2e820f4a277439a30eccf3096942d4ee234a6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72873eabb202eb3115cf1f6a7d2e820f4a277439a30eccf3096942d4ee234a6e", kill_on_drop: false }`
[INFO] [stdout] 72873eabb202eb3115cf1f6a7d2e820f4a277439a30eccf3096942d4ee234a6e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 63a27a031790b3d3c25fe43750b56171b2d30ed022a6c1fef58b212fb8619cd7
[INFO] running `Command { std: "docker" "start" "-a" "63a27a031790b3d3c25fe43750b56171b2d30ed022a6c1fef58b212fb8619cd7", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking fixedbitset v0.4.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking integer-sqrt v0.1.5
[INFO] [stderr]     Checking petgraph v0.6.0
[INFO] [stderr]     Checking pathfinding v3.0.5
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking scan_fmt v0.2.6
[INFO] [stderr]     Checking permutator v0.4.0
[INFO] [stderr]     Checking advent-of-code-2021 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `scan_fmt` is imported redundantly
[INFO] [stdout]  --> src/day17.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use scan_fmt;
[INFO] [stdout]   |     ^^^^^^^^ the item `scan_fmt` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `scan_fmt` is imported redundantly
[INFO] [stdout]  --> src/day17.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use scan_fmt;
[INFO] [stdout]   |     ^^^^^^^^ the item `scan_fmt` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/day6.rs:38:17
[INFO] [stdout]    |
[INFO] [stdout] 38 |             for mut fish in fish.iter_mut() {
[INFO] [stdout]    |                 ----^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/day6.rs:38:17
[INFO] [stdout]    |
[INFO] [stdout] 38 |             for mut fish in fish.iter_mut() {
[INFO] [stdout]    |                 ----^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.60s
[INFO] running `Command { std: "docker" "inspect" "63a27a031790b3d3c25fe43750b56171b2d30ed022a6c1fef58b212fb8619cd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63a27a031790b3d3c25fe43750b56171b2d30ed022a6c1fef58b212fb8619cd7", kill_on_drop: false }`
[INFO] [stdout] 63a27a031790b3d3c25fe43750b56171b2d30ed022a6c1fef58b212fb8619cd7
[INFO] checking apanloco/advent-of-code-2021 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fapanloco%2Fadvent-of-code-2021" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/apanloco/advent-of-code-2021 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/apanloco/advent-of-code-2021
[INFO] finished tweaking git repo https://github.com/apanloco/advent-of-code-2021
[INFO] tweaked toml for git repo https://github.com/apanloco/advent-of-code-2021 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/apanloco/advent-of-code-2021 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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 43fbbb80165eb18cfb58b11aa5103c8fe45c11af4510899558dc707a29b33d5d
[INFO] running `Command { std: "docker" "start" "-a" "43fbbb80165eb18cfb58b11aa5103c8fe45c11af4510899558dc707a29b33d5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "43fbbb80165eb18cfb58b11aa5103c8fe45c11af4510899558dc707a29b33d5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43fbbb80165eb18cfb58b11aa5103c8fe45c11af4510899558dc707a29b33d5d", kill_on_drop: false }`
[INFO] [stdout] 43fbbb80165eb18cfb58b11aa5103c8fe45c11af4510899558dc707a29b33d5d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] ad727e06e12be58d49f7f0eae943fea2b0eb277a48143ade015c9b26112ce5e9
[INFO] running `Command { std: "docker" "start" "-a" "ad727e06e12be58d49f7f0eae943fea2b0eb277a48143ade015c9b26112ce5e9", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking fixedbitset v0.4.0
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking integer-sqrt v0.1.5
[INFO] [stderr]     Checking petgraph v0.6.0
[INFO] [stderr]     Checking pathfinding v3.0.5
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking permutator v0.4.0
[INFO] [stderr]     Checking scan_fmt v0.2.6
[INFO] [stderr]     Checking advent-of-code-2021 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `scan_fmt` is imported redundantly
[INFO] [stdout]  --> src/day17.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use scan_fmt;
[INFO] [stdout]   |     ^^^^^^^^ the item `scan_fmt` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `scan_fmt` is imported redundantly
[INFO] [stdout]  --> src/day17.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use scan_fmt;
[INFO] [stdout]   |     ^^^^^^^^ the item `scan_fmt` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/day6.rs:38:17
[INFO] [stdout]    |
[INFO] [stdout] 38 |             for mut fish in fish.iter_mut() {
[INFO] [stdout]    |                 ----^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/day6.rs:38:17
[INFO] [stdout]    |
[INFO] [stdout] 38 |             for mut fish in fish.iter_mut() {
[INFO] [stdout]    |                 ----^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.35s
[INFO] running `Command { std: "docker" "inspect" "ad727e06e12be58d49f7f0eae943fea2b0eb277a48143ade015c9b26112ce5e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad727e06e12be58d49f7f0eae943fea2b0eb277a48143ade015c9b26112ce5e9", kill_on_drop: false }`
[INFO] [stdout] ad727e06e12be58d49f7f0eae943fea2b0eb277a48143ade015c9b26112ce5e9