[INFO] cloning repository https://github.com/mantou132/LeetCode-Solution
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mantou132/LeetCode-Solution" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmantou132%2FLeetCode-Solution", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmantou132%2FLeetCode-Solution'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0236012980391e37c398cd22aa9e145d83eb6dfa
[INFO] testing mantou132/LeetCode-Solution against beta-2021-01-01 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmantou132%2FLeetCode-Solution" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mantou132/LeetCode-Solution on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mantou132/LeetCode-Solution
[INFO] finished tweaking git repo https://github.com/mantou132/LeetCode-Solution
[INFO] tweaked toml for git repo https://github.com/mantou132/LeetCode-Solution written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/mantou132/LeetCode-Solution already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4a711368c06a8b541aa27e2661a37ffe18a9a644b9a92e858cf40504d4e10e26
[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" "4a711368c06a8b541aa27e2661a37ffe18a9a644b9a92e858cf40504d4e10e26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a711368c06a8b541aa27e2661a37ffe18a9a644b9a92e858cf40504d4e10e26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a711368c06a8b541aa27e2661a37ffe18a9a644b9a92e858cf40504d4e10e26", kill_on_drop: false }`
[INFO] [stdout] 4a711368c06a8b541aa27e2661a37ffe18a9a644b9a92e858cf40504d4e10e26
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 12796bc9a2811e081b4faeb8e24de4e15075b21afcdd34f08f93b22b2bab2c52
[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" "12796bc9a2811e081b4faeb8e24de4e15075b21afcdd34f08f93b22b2bab2c52", kill_on_drop: false }`
[INFO] [stderr]    Compiling leetcode-solution v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `curr` is never read
[INFO] [stdout]   --> src/p2.rs:56:7
[INFO] [stdout]    |
[INFO] [stdout] 56 |       curr = curr.next.as_mut().unwrap();
[INFO] [stdout]    |       ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/p1.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Solution {}
[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: `two_sum`
[INFO] [stdout]  --> src/p1.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 |   pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/p2.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Solution {}
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/p2.rs:11:6
[INFO] [stdout]    |
[INFO] [stdout] 11 |   fn new(val: i32) -> Self {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_two_numbers`
[INFO] [stdout]   --> src/p2.rs:17:10
[INFO] [stdout]    |
[INFO] [stdout] 17 |   pub fn add_two_numbers(
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/p3.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Solution {}
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `length_of_longest_substring`
[INFO] [stdout]  --> src/p3.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 |   pub fn length_of_longest_substring(s: String) -> i32 {
[INFO] [stdout]   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/p4.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Solution {}
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `find_median_sorted_arrays`
[INFO] [stdout]  --> src/p4.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 |   pub fn find_median_sorted_arrays(nums1: Vec<i32>, nums2: Vec<i32>) -> f64 {
[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 1.27s
[INFO] running `Command { std: "docker" "inspect" "12796bc9a2811e081b4faeb8e24de4e15075b21afcdd34f08f93b22b2bab2c52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12796bc9a2811e081b4faeb8e24de4e15075b21afcdd34f08f93b22b2bab2c52", kill_on_drop: false }`
[INFO] [stdout] 12796bc9a2811e081b4faeb8e24de4e15075b21afcdd34f08f93b22b2bab2c52
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] abe4ebd16eb1a4d71814cb433ddabba78b7c0b5ca3aac9d53f84595355caad54
[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" "abe4ebd16eb1a4d71814cb433ddabba78b7c0b5ca3aac9d53f84595355caad54", kill_on_drop: false }`
[INFO] [stderr]    Compiling leetcode-solution v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `curr` is never read
[INFO] [stdout]   --> src/p2.rs:56:7
[INFO] [stdout]    |
[INFO] [stdout] 56 |       curr = curr.next.as_mut().unwrap();
[INFO] [stdout]    |       ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.71s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "abe4ebd16eb1a4d71814cb433ddabba78b7c0b5ca3aac9d53f84595355caad54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abe4ebd16eb1a4d71814cb433ddabba78b7c0b5ca3aac9d53f84595355caad54", kill_on_drop: false }`
[INFO] [stdout] abe4ebd16eb1a4d71814cb433ddabba78b7c0b5ca3aac9d53f84595355caad54
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a2656723f9cca911127f0c430c3727a1c17a30f393d07d6207433b13ba6bbcff
[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" "a2656723f9cca911127f0c430c3727a1c17a30f393d07d6207433b13ba6bbcff", kill_on_drop: false }`
[INFO] [stderr] warning: value assigned to `curr` is never read
[INFO] [stderr]   --> src/p2.rs:56:7
[INFO] [stderr]    |
[INFO] [stderr] 56 |       curr = curr.next.as_mut().unwrap();
[INFO] [stderr]    |       ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/leetcode_solution-b26ea5ecfb2b2fc3
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test p1::tests::two_sum ... ok
[INFO] [stdout] test p2::tests::add_two_numbers ... ok
[INFO] [stdout] test p4::tests::find_median_sorted_arrays ... ok
[INFO] [stdout] test p3::tests::length_of_longest_substring ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a2656723f9cca911127f0c430c3727a1c17a30f393d07d6207433b13ba6bbcff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2656723f9cca911127f0c430c3727a1c17a30f393d07d6207433b13ba6bbcff", kill_on_drop: false }`
[INFO] [stdout] a2656723f9cca911127f0c430c3727a1c17a30f393d07d6207433b13ba6bbcff