[INFO] cloning repository https://github.com/kjvalencik/rust-adventofcode2018
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kjvalencik/rust-adventofcode2018" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkjvalencik%2Frust-adventofcode2018", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkjvalencik%2Frust-adventofcode2018'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 66874ce7d4ba095c19d79ba5e476df9cb8aa5402
[INFO] testing kjvalencik/rust-adventofcode2018 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkjvalencik%2Frust-adventofcode2018" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kjvalencik/rust-adventofcode2018
[INFO] finished tweaking git repo https://github.com/kjvalencik/rust-adventofcode2018
[INFO] tweaked toml for git repo https://github.com/kjvalencik/rust-adventofcode2018 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kjvalencik/rust-adventofcode2018 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kjvalencik/rust-adventofcode2018 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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded time v0.1.40
[INFO] [stderr]   Downloaded redox_syscall v0.1.43
[INFO] [stderr]   Downloaded chrono v0.4.6
[INFO] [stderr]   Downloaded libc v0.2.44
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5f60b1bf6ca9f77278154e2de5b7658034e8a69bec186d07e9263d7e97244d51
[INFO] running `Command { std: "docker" "start" "-a" "5f60b1bf6ca9f77278154e2de5b7658034e8a69bec186d07e9263d7e97244d51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5f60b1bf6ca9f77278154e2de5b7658034e8a69bec186d07e9263d7e97244d51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f60b1bf6ca9f77278154e2de5b7658034e8a69bec186d07e9263d7e97244d51", kill_on_drop: false }`
[INFO] [stdout] 5f60b1bf6ca9f77278154e2de5b7658034e8a69bec186d07e9263d7e97244d51
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 740634f841517afa6f844d0ff68e844de1909055625a7fe1e80b38ad1597aa81
[INFO] running `Command { std: "docker" "start" "-a" "740634f841517afa6f844d0ff68e844de1909055625a7fe1e80b38ad1597aa81", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling libc v0.2.44
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling day12 v0.1.0 (/opt/rustwide/workdir/solutions/day12)
[INFO] [stderr]    Compiling day14 v0.1.0 (/opt/rustwide/workdir/solutions/day14)
[INFO] [stderr]    Compiling day01 v0.1.0 (/opt/rustwide/workdir/solutions/day01)
[INFO] [stderr]    Compiling day10 v0.1.0 (/opt/rustwide/workdir/solutions/day10)
[INFO] [stderr]    Compiling day06 v0.1.0 (/opt/rustwide/workdir/solutions/day06)
[INFO] [stderr]    Compiling day02 v0.1.0 (/opt/rustwide/workdir/solutions/day02)
[INFO] [stderr]    Compiling day05 v0.1.0 (/opt/rustwide/workdir/solutions/day05)
[INFO] [stderr]    Compiling day11 v0.1.0 (/opt/rustwide/workdir/solutions/day11)
[INFO] [stderr]    Compiling day13 v0.1.0 (/opt/rustwide/workdir/solutions/day13)
[INFO] [stderr]    Compiling day03 v0.1.0 (/opt/rustwide/workdir/solutions/day03)
[INFO] [stderr]    Compiling day08 v0.1.0 (/opt/rustwide/workdir/solutions/day08)
[INFO] [stderr]    Compiling day09 v0.1.0 (/opt/rustwide/workdir/solutions/day09)
[INFO] [stderr]    Compiling day07 v0.1.0 (/opt/rustwide/workdir/solutions/day07)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> solutions/day10/src/main.rs:4:18
[INFO] [stdout]   |
[INFO] [stdout] 4 | type Error = Box<std::error::Error>;
[INFO] [stdout]   |                  ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 4 | type Error = Box<dyn std::error::Error>;
[INFO] [stdout]   |                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> solutions/day12/src/main.rs:5:18
[INFO] [stdout]   |
[INFO] [stdout] 5 | type Error = Box<std::error::Error>;
[INFO] [stdout]   |                  ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 5 | type Error = Box<dyn std::error::Error>;
[INFO] [stdout]   |                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `serial` is never read
[INFO] [stdout]  --> solutions/day11/src/main.rs:6:2
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Day11 {
[INFO] [stdout]   |        ----- field in this struct
[INFO] [stdout] 6 |     serial: i64,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Day11` 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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> solutions/day09/src/main.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 | type BoxError = Box<std::error::Error>;
[INFO] [stdout]   |                     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 3 | type BoxError = Box<dyn std::error::Error>;
[INFO] [stdout]   |                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> solutions/day13/src/main.rs:5:18
[INFO] [stdout]   |
[INFO] [stdout] 5 | type Error = Box<std::error::Error>;
[INFO] [stdout]   |                  ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 5 | type Error = Box<dyn std::error::Error>;
[INFO] [stdout]   |                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> solutions/day14/src/main.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 |             let mut elf = &mut self.elves[i];
[INFO] [stdout]    |                 ----^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling time v0.1.40
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling day04 v0.1.0 (/opt/rustwide/workdir/solutions/day04)
[INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing
[INFO] [stdout]   --> solutions/day04/src/main.rs:78:64
[INFO] [stdout]    |
[INFO] [stdout] 78 |     fn shifts<'a>(self: &'a Self, id: Id) -> impl Iterator<Item = &Log> + 'a {
[INFO] [stdout]    |                          --                                       ^^^^    -- the same lifetime is named here
[INFO] [stdout]    |                          |                                        |
[INFO] [stdout]    |                          the lifetime is named here               the same lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 78 |     fn shifts<'a>(self: &'a Self, id: Id) -> impl Iterator<Item = &'a Log> + 'a {
[INFO] [stdout]    |                                                                    ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.26s
[INFO] running `Command { std: "docker" "inspect" "740634f841517afa6f844d0ff68e844de1909055625a7fe1e80b38ad1597aa81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "740634f841517afa6f844d0ff68e844de1909055625a7fe1e80b38ad1597aa81", kill_on_drop: false }`
[INFO] [stdout] 740634f841517afa6f844d0ff68e844de1909055625a7fe1e80b38ad1597aa81
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8f03a097de907101cc0fd1995843cd1dc19772ef3d77c8edf8f8d85e8588a15e
[INFO] running `Command { std: "docker" "start" "-a" "8f03a097de907101cc0fd1995843cd1dc19772ef3d77c8edf8f8d85e8588a15e", kill_on_drop: false }`
[INFO] [stderr]    Compiling day08 v0.1.0 (/opt/rustwide/workdir/solutions/day08)
[INFO] [stderr]    Compiling day10 v0.1.0 (/opt/rustwide/workdir/solutions/day10)
[INFO] [stderr]    Compiling day09 v0.1.0 (/opt/rustwide/workdir/solutions/day09)
[INFO] [stderr]    Compiling day06 v0.1.0 (/opt/rustwide/workdir/solutions/day06)
[INFO] [stderr]    Compiling day14 v0.1.0 (/opt/rustwide/workdir/solutions/day14)
[INFO] [stderr]    Compiling day13 v0.1.0 (/opt/rustwide/workdir/solutions/day13)
[INFO] [stderr]    Compiling day11 v0.1.0 (/opt/rustwide/workdir/solutions/day11)
[INFO] [stderr]    Compiling day03 v0.1.0 (/opt/rustwide/workdir/solutions/day03)
[INFO] [stderr]    Compiling day07 v0.1.0 (/opt/rustwide/workdir/solutions/day07)
[INFO] [stderr]    Compiling day05 v0.1.0 (/opt/rustwide/workdir/solutions/day05)
[INFO] [stderr]    Compiling day12 v0.1.0 (/opt/rustwide/workdir/solutions/day12)
[INFO] [stderr]    Compiling day01 v0.1.0 (/opt/rustwide/workdir/solutions/day01)
[INFO] [stderr]    Compiling day02 v0.1.0 (/opt/rustwide/workdir/solutions/day02)
[INFO] [stderr]    Compiling day04 v0.1.0 (/opt/rustwide/workdir/solutions/day04)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> solutions/day12/src/main.rs:5:18
[INFO] [stdout]   |
[INFO] [stdout] 5 | type Error = Box<std::error::Error>;
[INFO] [stdout]   |                  ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 5 | type Error = Box<dyn std::error::Error>;
[INFO] [stdout]   |                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> solutions/day13/src/main.rs:5:18
[INFO] [stdout]   |
[INFO] [stdout] 5 | type Error = Box<std::error::Error>;
[INFO] [stdout]   |                  ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 5 | type Error = Box<dyn std::error::Error>;
[INFO] [stdout]   |                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> solutions/day10/src/main.rs:4:18
[INFO] [stdout]   |
[INFO] [stdout] 4 | type Error = Box<std::error::Error>;
[INFO] [stdout]   |                  ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 4 | type Error = Box<dyn std::error::Error>;
[INFO] [stdout]   |                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> solutions/day09/src/main.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 | type BoxError = Box<std::error::Error>;
[INFO] [stdout]   |                     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 3 | type BoxError = Box<dyn std::error::Error>;
[INFO] [stdout]   |                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `serial` is never read
[INFO] [stdout]  --> solutions/day11/src/main.rs:6:2
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Day11 {
[INFO] [stdout]   |        ----- field in this struct
[INFO] [stdout] 6 |     serial: i64,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Day11` 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: variable does not need to be mutable
[INFO] [stdout]   --> solutions/day14/src/main.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 |             let mut elf = &mut self.elves[i];
[INFO] [stdout]    |                 ----^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing
[INFO] [stdout]   --> solutions/day04/src/main.rs:78:64
[INFO] [stdout]    |
[INFO] [stdout] 78 |     fn shifts<'a>(self: &'a Self, id: Id) -> impl Iterator<Item = &Log> + 'a {
[INFO] [stdout]    |                          --                                       ^^^^    -- the same lifetime is named here
[INFO] [stdout]    |                          |                                        |
[INFO] [stdout]    |                          the lifetime is named here               the same lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 78 |     fn shifts<'a>(self: &'a Self, id: Id) -> impl Iterator<Item = &'a Log> + 'a {
[INFO] [stdout]    |                                                                    ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.88s
[INFO] running `Command { std: "docker" "inspect" "8f03a097de907101cc0fd1995843cd1dc19772ef3d77c8edf8f8d85e8588a15e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f03a097de907101cc0fd1995843cd1dc19772ef3d77c8edf8f8d85e8588a15e", kill_on_drop: false }`
[INFO] [stdout] 8f03a097de907101cc0fd1995843cd1dc19772ef3d77c8edf8f8d85e8588a15e
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 163c0c068ea7c4440e00dab358ecaf3cd64fce748d4769acab1c9e36e39e7424
[INFO] running `Command { std: "docker" "start" "-a" "163c0c068ea7c4440e00dab358ecaf3cd64fce748d4769acab1c9e36e39e7424", kill_on_drop: false }`
[INFO] [stderr] warning: field `serial` is never read
[INFO] [stderr]  --> solutions/day11/src/main.rs:6:2
[INFO] [stderr]   |
[INFO] [stderr] 5 | struct Day11 {
[INFO] [stderr]   |        ----- field in this struct
[INFO] [stderr] 6 |     serial: i64,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Day11` 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: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> solutions/day13/src/main.rs:5:18
[INFO] [stderr]   |
[INFO] [stderr] 5 | type Error = Box<std::error::Error>;
[INFO] [stderr]   |                  ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]   = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]   |
[INFO] [stderr] 5 | type Error = Box<dyn std::error::Error>;
[INFO] [stderr]   |                  +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> solutions/day10/src/main.rs:4:18
[INFO] [stderr]   |
[INFO] [stderr] 4 | type Error = Box<std::error::Error>;
[INFO] [stderr]   |                  ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]   = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]   |
[INFO] [stderr] 4 | type Error = Box<dyn std::error::Error>;
[INFO] [stderr]   |                  +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> solutions/day12/src/main.rs:5:18
[INFO] [stderr]   |
[INFO] [stderr] 5 | type Error = Box<std::error::Error>;
[INFO] [stderr]   |                  ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]   = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]   |
[INFO] [stderr] 5 | type Error = Box<dyn std::error::Error>;
[INFO] [stderr]   |                  +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> solutions/day09/src/main.rs:3:21
[INFO] [stderr]   |
[INFO] [stderr] 3 | type BoxError = Box<std::error::Error>;
[INFO] [stderr]   |                     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]   = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]   |
[INFO] [stderr] 3 | type BoxError = Box<dyn std::error::Error>;
[INFO] [stderr]   |                     +++
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> solutions/day14/src/main.rs:61:8
[INFO] [stderr]    |
[INFO] [stderr] 61 |             let mut elf = &mut self.elves[i];
[INFO] [stderr]    |                 ----^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `day11` (bin "day11" test) generated 1 warning
[INFO] [stderr] warning: `day13` (bin "day13" test) generated 1 warning (run `cargo fix --bin "day13" -p day13 --tests` to apply 1 suggestion)
[INFO] [stderr] warning: `day10` (bin "day10" test) generated 1 warning (run `cargo fix --bin "day10" -p day10 --tests` to apply 1 suggestion)
[INFO] [stderr] warning: `day12` (bin "day12" test) generated 1 warning (run `cargo fix --bin "day12" -p day12 --tests` to apply 1 suggestion)
[INFO] [stderr] warning: `day09` (bin "day09" test) generated 1 warning (run `cargo fix --bin "day09" -p day09 --tests` to apply 1 suggestion)
[INFO] [stderr] warning: `day14` (bin "day14" test) generated 1 warning (run `cargo fix --bin "day14" -p day14 --tests` to apply 1 suggestion)
[INFO] [stderr] warning: eliding a lifetime that's named elsewhere is confusing
[INFO] [stderr]   --> solutions/day04/src/main.rs:78:64
[INFO] [stderr]    |
[INFO] [stderr] 78 |     fn shifts<'a>(self: &'a Self, id: Id) -> impl Iterator<Item = &Log> + 'a {
[INFO] [stderr]    |                          --                                       ^^^^    -- the same lifetime is named here
[INFO] [stderr]    |                          |                                        |
[INFO] [stderr]    |                          the lifetime is named here               the same lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: consistently use `'a`
[INFO] [stderr]    |
[INFO] [stderr] 78 |     fn shifts<'a>(self: &'a Self, id: Id) -> impl Iterator<Item = &'a Log> + 'a {
[INFO] [stderr]    |                                                                    ++
[INFO] [stderr] 
[INFO] [stderr] warning: `day04` (bin "day04" test) generated 1 warning (run `cargo fix --bin "day04" -p day04 --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/day01-eb33a387b36f63ce)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/day02-ba497b2648826fdc)
[INFO] [stdout] test tests::first_repeat ... ok
[INFO] [stdout] test tests::frequency ... ok
[INFO] [stdout] test tests::parse ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/day03-0ab773e56e689ade)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test tests::matches ... ok
[INFO] [stdout] test tests::checksum ... ok
[INFO] [stdout] test tests::parse ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::non_overlapped ... ok
[INFO] [stdout] test tests::total_overlapped ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/day04-edc532b18af5a089)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/day05-40bb1b44552b7e64)
[INFO] [stdout] test tests::ids ... ok
[INFO] [stdout] test tests::max_frequency ... ok
[INFO] [stdout] test tests::max_minute ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::reaction ... ok
[INFO] [stdout] test tests::improve_reaction ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/day06-44e71e57366f1017)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::largest_area ... ok
[INFO] [stdout] test tests::close_region_size ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/day07-2b3254dc4192d4b6)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::multi_worker ... ok
[INFO] [stdout] test tests::single_order ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/day08-11b0ab7530c8734b)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::checksum ... ok
[INFO] [stdout] test tests::root_value ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/day09-5577e904cc0bfd59)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::parse ... ok
[INFO] [stdout] test tests::max_score ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/day10-36b2c48a66ec59f7)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::guess ... ok
[INFO] [stdout] test tests::graph ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/day11-8bef4929f21135a7)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test tests::largest_power_grid ... ignored
[INFO] [stdout] test tests::total_power ... ok
[INFO] [stdout] test tests::cell ... ok
[INFO] [stdout] test tests::largest_power ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 2.24s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/day12-1b7148a9d0ce8ca4)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::count ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/day13-70a753b651bbdfdc)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::simulate ... ok
[INFO] [stdout] test tests::collision ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/day14-2da6b344dc7dee6d)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::simulate_two ... ok
[INFO] [stdout] test tests::simulate ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "163c0c068ea7c4440e00dab358ecaf3cd64fce748d4769acab1c9e36e39e7424", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "163c0c068ea7c4440e00dab358ecaf3cd64fce748d4769acab1c9e36e39e7424", kill_on_drop: false }`
[INFO] [stdout] 163c0c068ea7c4440e00dab358ecaf3cd64fce748d4769acab1c9e36e39e7424
