[INFO] cloning repository https://github.com/Jabbslad/computer_science_problems_in_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Jabbslad/computer_science_problems_in_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJabbslad%2Fcomputer_science_problems_in_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJabbslad%2Fcomputer_science_problems_in_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 47aeeddfb78234a955608dc81a3b3e81ec22e220
[INFO] checking Jabbslad/computer_science_problems_in_rust against master#d2e8ecd8bd26a22111cdebfb813258450b07fbf0 for pr-121199
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJabbslad%2Fcomputer_science_problems_in_rust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Jabbslad/computer_science_problems_in_rust on toolchain d2e8ecd8bd26a22111cdebfb813258450b07fbf0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d2e8ecd8bd26a22111cdebfb813258450b07fbf0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Jabbslad/computer_science_problems_in_rust
[INFO] finished tweaking git repo https://github.com/Jabbslad/computer_science_problems_in_rust
[INFO] tweaked toml for git repo https://github.com/Jabbslad/computer_science_problems_in_rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Jabbslad/computer_science_problems_in_rust 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" "+d2e8ecd8bd26a22111cdebfb813258450b07fbf0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking Jabbslad/computer_science_problems_in_rust against try#aface909a877127f24c62858518cef2d593e2ea1 for pr-121199
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJabbslad%2Fcomputer_science_problems_in_rust" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Jabbslad/computer_science_problems_in_rust on toolchain aface909a877127f24c62858518cef2d593e2ea1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+aface909a877127f24c62858518cef2d593e2ea1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Jabbslad/computer_science_problems_in_rust
[INFO] finished tweaking git repo https://github.com/Jabbslad/computer_science_problems_in_rust
[INFO] tweaked toml for git repo https://github.com/Jabbslad/computer_science_problems_in_rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Jabbslad/computer_science_problems_in_rust 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" "+aface909a877127f24c62858518cef2d593e2ea1" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+aface909a877127f24c62858518cef2d593e2ea1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e0c501d3dc933d1afedb6bddf189c0960a318960e688124c70a67afd5dcd7e16
[INFO] running `Command { std: "docker" "start" "-a" "e0c501d3dc933d1afedb6bddf189c0960a318960e688124c70a67afd5dcd7e16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e0c501d3dc933d1afedb6bddf189c0960a318960e688124c70a67afd5dcd7e16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0c501d3dc933d1afedb6bddf189c0960a318960e688124c70a67afd5dcd7e16", kill_on_drop: false }`
[INFO] [stdout] e0c501d3dc933d1afedb6bddf189c0960a318960e688124c70a67afd5dcd7e16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+aface909a877127f24c62858518cef2d593e2ea1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] efdbeff7bdf5972b056acee8aa4df56bbee9e59dec006b9f01bfafcd3531de06
[INFO] running `Command { std: "docker" "start" "-a" "efdbeff7bdf5972b056acee8aa4df56bbee9e59dec006b9f01bfafcd3531de06", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking computer_science_problems_in_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `fib_m` is never used
[INFO] [stdout]  --> src/fib.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn fib_m(m: &mut HashMap<i64, i64>, n: i64) -> i64 {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fib_mem` is never used
[INFO] [stdout]   --> src/fib.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn fib_mem(n: i64) -> i64 {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fib_iter` is never used
[INFO] [stdout]   --> src/fib.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn fib_iter(n: i64) -> i64 {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fib_no_tr` is never used
[INFO] [stdout]   --> src/fib.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub fn fib_no_tr(n: i64) -> i64 {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `BitPair` is never used
[INFO] [stdout]  --> src/compression.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | type BitPair = (bool, bool);
[INFO] [stdout]   |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `compress2` is never used
[INFO] [stdout]  --> src/compression.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn compress2(s: String) -> Vec<BitPair> {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `decompress` is never used
[INFO] [stdout]   --> src/compression.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn decompress(v: &Vec<BitPair>) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `compress` is never used
[INFO] [stdout]   --> src/compression.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn compress(s: String) -> String {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `random_key` is never used
[INFO] [stdout]  --> src/encryption.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn random_key(n: u32) -> u32 {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.42s
[INFO] running `Command { std: "docker" "inspect" "efdbeff7bdf5972b056acee8aa4df56bbee9e59dec006b9f01bfafcd3531de06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efdbeff7bdf5972b056acee8aa4df56bbee9e59dec006b9f01bfafcd3531de06", kill_on_drop: false }`
[INFO] [stdout] efdbeff7bdf5972b056acee8aa4df56bbee9e59dec006b9f01bfafcd3531de06