[INFO] cloning repository https://github.com/gpwclark/learnrust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gpwclark/learnrust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgpwclark%2Flearnrust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgpwclark%2Flearnrust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fc02c9b4e669a3865709ba3108457a9e86a8df2b
[INFO] checking gpwclark/learnrust against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgpwclark%2Flearnrust" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gpwclark/learnrust on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gpwclark/learnrust
[INFO] finished tweaking git repo https://github.com/gpwclark/learnrust
[INFO] tweaked toml for git repo https://github.com/gpwclark/learnrust written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/gpwclark/learnrust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0b549e17c25967dd82d1280fdd3bb370ae4c7525a88275154108cf3c5b58c76e
[INFO] running `Command { std: "docker" "start" "-a" "0b549e17c25967dd82d1280fdd3bb370ae4c7525a88275154108cf3c5b58c76e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0b549e17c25967dd82d1280fdd3bb370ae4c7525a88275154108cf3c5b58c76e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b549e17c25967dd82d1280fdd3bb370ae4c7525a88275154108cf3c5b58c76e", kill_on_drop: false }`
[INFO] [stdout] 0b549e17c25967dd82d1280fdd3bb370ae4c7525a88275154108cf3c5b58c76e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 695394a5ba86c588977c724a47d7cdc8053cbdc84c930c5f02022a96e0ef68ef
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "695394a5ba86c588977c724a47d7cdc8053cbdc84c930c5f02022a96e0ef68ef", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.68
[INFO] [stderr]    Compiling libc v0.2.92
[INFO] [stderr]     Checking directories v0.10.0
[INFO] [stderr]     Checking regex-syntax v0.6.23
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking regex v1.4.5
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling enum-display-derive v0.1.1
[INFO] [stderr]     Checking serde v1.0.125
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking confy v0.3.1
[INFO] [stderr]     Checking learn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/advent_of_code/mod.rs:55:16
[INFO] [stdout]    |
[INFO] [stdout] 55 |         pub fn new(line: &str) -> Option<Password> {
[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: `make_password`
[INFO] [stdout]   --> src/advent_of_code/mod.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 59 |         fn make_password(line: &str) -> Option<Password> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_valid_new`
[INFO] [stdout]   --> src/advent_of_code/mod.rs:82:16
[INFO] [stdout]    |
[INFO] [stdout] 82 |         pub fn is_valid_new(&self) -> bool {
[INFO] [stdout]    |                ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_valid`
[INFO] [stdout]    --> src/advent_of_code/mod.rs:101:16
[INFO] [stdout]     |
[INFO] [stdout] 101 |         pub fn is_valid(&self) -> bool {
[INFO] [stdout]     |                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `solve_puzzle_1`
[INFO] [stdout]    --> src/advent_of_code/mod.rs:205:12
[INFO] [stdout]     |
[INFO] [stdout] 205 |     pub fn solve_puzzle_1() -> usize {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `solve_puzzle_2`
[INFO] [stdout]    --> src/advent_of_code/mod.rs:217:12
[INFO] [stdout]     |
[INFO] [stdout] 217 |     pub fn solve_puzzle_2() -> usize {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/advent_of_code/mod.rs:242:16
[INFO] [stdout]     |
[INFO] [stdout] 242 |         pub fn new(arr: Vec<u8>) -> CircArr {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]    --> src/advent_of_code/mod.rs:248:16
[INFO] [stdout]     |
[INFO] [stdout] 248 |         pub fn get(&self, idx: usize) -> u8 {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `solve_puzzle_1`
[INFO] [stdout]    --> src/advent_of_code/mod.rs:278:12
[INFO] [stdout]     |
[INFO] [stdout] 278 |     pub fn solve_puzzle_1() -> u32 {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `solve_puzzle_2`
[INFO] [stdout]    --> src/advent_of_code/mod.rs:300:12
[INFO] [stdout]     |
[INFO] [stdout] 300 |     pub fn solve_puzzle_2() {}
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.03s
[INFO] running `Command { std: "docker" "inspect" "695394a5ba86c588977c724a47d7cdc8053cbdc84c930c5f02022a96e0ef68ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "695394a5ba86c588977c724a47d7cdc8053cbdc84c930c5f02022a96e0ef68ef", kill_on_drop: false }`
[INFO] [stdout] 695394a5ba86c588977c724a47d7cdc8053cbdc84c930c5f02022a96e0ef68ef