[INFO] cloning repository https://github.com/pymongo/rust_leetcode
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pymongo/rust_leetcode" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpymongo%2Frust_leetcode", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpymongo%2Frust_leetcode'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2d3c9fa9c21c930bea907c561c42db5e870cb107
[INFO] testing pymongo/rust_leetcode against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpymongo%2Frust_leetcode" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pymongo/rust_leetcode on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/pymongo/rust_leetcode
[INFO] finished tweaking git repo https://github.com/pymongo/rust_leetcode
[INFO] tweaked toml for git repo https://github.com/pymongo/rust_leetcode written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cde0ff578a867f0cd2a5d90ecc9f36db23eb9771d28ee8bf438d3106542abf19
[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" "cde0ff578a867f0cd2a5d90ecc9f36db23eb9771d28ee8bf438d3106542abf19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cde0ff578a867f0cd2a5d90ecc9f36db23eb9771d28ee8bf438d3106542abf19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cde0ff578a867f0cd2a5d90ecc9f36db23eb9771d28ee8bf438d3106542abf19", kill_on_drop: false }`
[INFO] [stdout] cde0ff578a867f0cd2a5d90ecc9f36db23eb9771d28ee8bf438d3106542abf19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", 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] ca1cf9607c5867c40ed4ad80648670a6a8246263b153b62fa9af0738c6f61c7f
[INFO] running `Command { std: "docker" "start" "-a" "ca1cf9607c5867c40ed4ad80648670a6a8246263b153b62fa9af0738c6f61c7f", kill_on_drop: false }`
[INFO] [stderr]    Compiling leetcode v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/unclassified/shuffle_the_array.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: `shuffle`
[INFO] [stdout]  --> src/unclassified/shuffle_the_array.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn shuffle(nums: Vec<i32>, n: i32) -> Vec<i32> {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `Command { std: "docker" "inspect" "ca1cf9607c5867c40ed4ad80648670a6a8246263b153b62fa9af0738c6f61c7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca1cf9607c5867c40ed4ad80648670a6a8246263b153b62fa9af0738c6f61c7f", kill_on_drop: false }`
[INFO] [stdout] ca1cf9607c5867c40ed4ad80648670a6a8246263b153b62fa9af0738c6f61c7f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 41409a0f41f7d326d2a0ddfb0b7be34be9ef346e75a8004d922a5abcc9f0d129
[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" "41409a0f41f7d326d2a0ddfb0b7be34be9ef346e75a8004d922a5abcc9f0d129", kill_on_drop: false }`
[INFO] [stderr]    Compiling leetcode v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/unclassified/shuffle_the_array.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: `shuffle`
[INFO] [stdout]  --> src/unclassified/shuffle_the_array.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn shuffle(nums: Vec<i32>, n: i32) -> Vec<i32> {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.16s
[INFO] running `Command { std: "docker" "inspect" "41409a0f41f7d326d2a0ddfb0b7be34be9ef346e75a8004d922a5abcc9f0d129", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41409a0f41f7d326d2a0ddfb0b7be34be9ef346e75a8004d922a5abcc9f0d129", kill_on_drop: false }`
[INFO] [stdout] 41409a0f41f7d326d2a0ddfb0b7be34be9ef346e75a8004d922a5abcc9f0d129
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b05e5c38e588b57d06bfd4722e4347432d8ee193ae8e19d0006e5bc9aaddc1ab
[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" "b05e5c38e588b57d06bfd4722e4347432d8ee193ae8e19d0006e5bc9aaddc1ab", 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/unclassified/shuffle_the_array.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `shuffle`
[INFO] [stderr]  --> src/unclassified/shuffle_the_array.rs:4:12
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn shuffle(nums: Vec<i32>, n: i32) -> Vec<i32> {
[INFO] [stderr]   |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.41s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/leetcode-9aa0d46c49e8bb7b
[INFO] [stdout] 
[INFO] [stdout] running 27 tests
[INFO] [stdout] test sorting::median_of_two_sorted_arrays::test_my_brute_force ... ok
[INFO] [stdout] test collections::btree_map_two_sum::test_sum_hashmap ... ok
[INFO] [stdout] test string::i32_is_palindromic::test_first_try ... ok
[INFO] [stdout] test string::contains_substr_kmp::test_kmp ... ok
[INFO] [stdout] test string::i32_is_palindromic::test_reverse ... ok
[INFO] [stdout] test string::longest_common_substr_of_two_str::test ... ok
[INFO] [stdout] test string::longest_non_repeated_substr::test_i32_ascii_table ... ok
[INFO] [stdout] test string::longest_non_repeated_substr::test_usize_ascii_table ... ok
[INFO] [stdout] test string::longest_palindromic_substr::test_dp ... ok
[INFO] [stdout] test string::longest_palindromic_substr::test_dp_new ... ok
[INFO] [stdout] test string::longest_palindromic_substr::test_expand_around_center ... ok
[INFO] [stdout] test string::longest_palindromic_substr::test_manacher ... ok
[INFO] [stdout] test string::longest_palindromic_substr::test_manacher_old ... ok
[INFO] [stdout] test unclassified::shuffle_the_array::test_shuffle ... ok
[INFO] [stdout] test string::i32_is_palindromic::test_i32_to_string ... ok
[INFO] [stdout] test collections::traverse_two_list_node::test_helper_methods ... ok
[INFO] [stdout] test collections::btree_map_two_sum::test_two_sum_btree_map ... ok
[INFO] [stdout] test bitwise::nim_game::test_nim_bitwise ... ok
[INFO] [stdout] test classic::tail_recursion_fibonacci::test_iterate ... ok
[INFO] [stdout] test collections::traverse_two_list_node::test_traverse_two_list_node ... ok
[INFO] [stdout] test sorting::median_of_two_sorted_arrays::test_move_divider_of_two_arrays ... ok
[INFO] [stderr]    Doc-tests leetcode
[INFO] [stdout] test classic::tail_recursion_fibonacci::test_tail_recursion ... ok
[INFO] [stdout] test collections::btree_map_two_sum::test_two_sum_bitwise ... ok
[INFO] [stdout] test sorting::merge_two_sorted_arrays::test_my_first_solution ... ok
[INFO] [stdout] test sorting::quick_sort::test_quick_sort ... ok
[INFO] [stdout] test impl_api::to_lowercase::test_my_solution ... ok
[INFO] [stdout] test permutation::shortest_paths_on_checkerboard::test_unique_paths ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 27 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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 `Command { std: "docker" "inspect" "b05e5c38e588b57d06bfd4722e4347432d8ee193ae8e19d0006e5bc9aaddc1ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b05e5c38e588b57d06bfd4722e4347432d8ee193ae8e19d0006e5bc9aaddc1ab", kill_on_drop: false }`
[INFO] [stdout] b05e5c38e588b57d06bfd4722e4347432d8ee193ae8e19d0006e5bc9aaddc1ab