[INFO] updating cached repository https://github.com/ahaggi/rust_kattis_counting_palindromes
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f286b596a36953206e5c2fee805b952e04c9e74b
[INFO] testing ahaggi/rust_kattis_counting_palindromes against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fahaggi%2Frust_kattis_counting_palindromes" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ahaggi/rust_kattis_counting_palindromes on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/ahaggi/rust_kattis_counting_palindromes
[INFO] finished tweaking git repo https://github.com/ahaggi/rust_kattis_counting_palindromes
[INFO] tweaked toml for git repo https://github.com/ahaggi/rust_kattis_counting_palindromes written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/ahaggi/rust_kattis_counting_palindromes already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 801ff3cbc976018bf4b4de50fdd6fbc6b2244b3ae33a8c5327e876591570dbe9
[INFO] running `"docker" "start" "-a" "801ff3cbc976018bf4b4de50fdd6fbc6b2244b3ae33a8c5327e876591570dbe9"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling counting_palindromes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused imports: `BufRead`, `BufReader`
[INFO] [stderr]   --> src/main.rs:76:15
[INFO] [stderr]    |
[INFO] [stderr] 76 | use std::io::{BufRead, BufReader, BufWriter};
[INFO] [stderr]    |               ^^^^^^^  ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |     let mut lvl = lvl;
[INFO] [stderr]    |         ----^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:87:9
[INFO] [stderr]    |
[INFO] [stderr] 87 |     let mut file = File::create("output.txt").expect("Unable to create file");
[INFO] [stderr]    |         ----^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.86s
[INFO] running `"docker" "inspect" "801ff3cbc976018bf4b4de50fdd6fbc6b2244b3ae33a8c5327e876591570dbe9"`
[INFO] running `"docker" "rm" "-f" "801ff3cbc976018bf4b4de50fdd6fbc6b2244b3ae33a8c5327e876591570dbe9"`
[INFO] [stdout] 801ff3cbc976018bf4b4de50fdd6fbc6b2244b3ae33a8c5327e876591570dbe9
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] c8c63e881b56aaa26664e546ed610d9c80fbdc82a4f0ebe33fa7bada157e9dde
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "c8c63e881b56aaa26664e546ed610d9c80fbdc82a4f0ebe33fa7bada157e9dde"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling counting_palindromes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused imports: `BufRead`, `BufReader`
[INFO] [stderr]   --> src/main.rs:76:15
[INFO] [stderr]    |
[INFO] [stderr] 76 | use std::io::{BufRead, BufReader, BufWriter};
[INFO] [stderr]    |               ^^^^^^^  ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |     let mut lvl = lvl;
[INFO] [stderr]    |         ----^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:87:9
[INFO] [stderr]    |
[INFO] [stderr] 87 |     let mut file = File::create("output.txt").expect("Unable to create file");
[INFO] [stderr]    |         ----^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `"docker" "inspect" "c8c63e881b56aaa26664e546ed610d9c80fbdc82a4f0ebe33fa7bada157e9dde"`
[INFO] running `"docker" "rm" "-f" "c8c63e881b56aaa26664e546ed610d9c80fbdc82a4f0ebe33fa7bada157e9dde"`
[INFO] [stdout] c8c63e881b56aaa26664e546ed610d9c80fbdc82a4f0ebe33fa7bada157e9dde
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e09f4b0c642b2ea0c0301ce98b2da2cff887aacb3ca84b53e6bee2157b761c45
[INFO] running `"docker" "start" "-a" "e09f4b0c642b2ea0c0301ce98b2da2cff887aacb3ca84b53e6bee2157b761c45"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: unused imports: `BufRead`, `BufReader`
[INFO] [stderr]   --> src/main.rs:76:15
[INFO] [stderr]    |
[INFO] [stderr] 76 | use std::io::{BufRead, BufReader, BufWriter};
[INFO] [stderr]    |               ^^^^^^^  ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |     let mut lvl = lvl;
[INFO] [stderr]    |         ----^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:87:9
[INFO] [stderr]    |
[INFO] [stderr] 87 |     let mut file = File::create("output.txt").expect("Unable to create file");
[INFO] [stderr]    |         ----^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/counting_palindromes-7b3939d7b0e20f87
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "e09f4b0c642b2ea0c0301ce98b2da2cff887aacb3ca84b53e6bee2157b761c45"`
[INFO] running `"docker" "rm" "-f" "e09f4b0c642b2ea0c0301ce98b2da2cff887aacb3ca84b53e6bee2157b761c45"`
[INFO] [stdout] e09f4b0c642b2ea0c0301ce98b2da2cff887aacb3ca84b53e6bee2157b761c45