[INFO] cloning repository https://github.com/trickyrat/Leetcoders
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/trickyrat/Leetcoders" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrickyrat%2FLeetcoders", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrickyrat%2FLeetcoders'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bab63949403d37343742cdc8cb6aa55bb09128ac
[INFO] checking trickyrat/Leetcoders against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrickyrat%2FLeetcoders" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/trickyrat/Leetcoders on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/trickyrat/Leetcoders
[INFO] finished tweaking git repo https://github.com/trickyrat/Leetcoders
[INFO] tweaked toml for git repo https://github.com/trickyrat/Leetcoders written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 9 packages
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a5063a8066c1fd7dac2aeb7ff93157698df011919c68a50836adcb02eec75a53
[INFO] running `Command { std: "docker" "start" "-a" "a5063a8066c1fd7dac2aeb7ff93157698df011919c68a50836adcb02eec75a53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a5063a8066c1fd7dac2aeb7ff93157698df011919c68a50836adcb02eec75a53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5063a8066c1fd7dac2aeb7ff93157698df011919c68a50836adcb02eec75a53", kill_on_drop: false }`
[INFO] [stdout] a5063a8066c1fd7dac2aeb7ff93157698df011919c68a50836adcb02eec75a53
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fe358942835c02c3331e404bfbdc47276493d287c1f16b5ea10650077848d0cb
[INFO] running `Command { std: "docker" "start" "-a" "fe358942835c02c3331e404bfbdc47276493d287c1f16b5ea10650077848d0cb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking leetcoders v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `LinkedList`
[INFO] [stdout]  --> src/leetcode/data_structures/mod.rs:4:27
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub use self::list_node::{LinkedList, ListNode};
[INFO] [stdout]   |                           ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::interview_solution::*`
[INFO] [stdout]  --> src/leetcode/mod.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub use self::interview_solution::*;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::randomized_set::RandomizedSet`
[INFO] [stdout]   --> src/leetcode/mod.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub use self::randomized_set::RandomizedSet;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::solution::*`
[INFO] [stdout]   --> src/leetcode/mod.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub use self::solution::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::stock_spanner::StockSpanner`
[INFO] [stdout]   --> src/leetcode/mod.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub use self::stock_spanner::StockSpanner;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::util::*`
[INFO] [stdout]   --> src/leetcode/mod.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub use self::util::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `LinkedList`
[INFO] [stdout]  --> src/leetcode/data_structures/mod.rs:4:27
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub use self::list_node::{LinkedList, ListNode};
[INFO] [stdout]   |                           ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::interview_solution::*`
[INFO] [stdout]  --> src/leetcode/mod.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub use self::interview_solution::*;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::solution::*`
[INFO] [stdout]   --> src/leetcode/mod.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub use self::solution::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::util::*`
[INFO] [stdout]   --> src/leetcode/mod.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub use self::util::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.42s
[INFO] running `Command { std: "docker" "inspect" "fe358942835c02c3331e404bfbdc47276493d287c1f16b5ea10650077848d0cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe358942835c02c3331e404bfbdc47276493d287c1f16b5ea10650077848d0cb", kill_on_drop: false }`
[INFO] [stdout] fe358942835c02c3331e404bfbdc47276493d287c1f16b5ea10650077848d0cb