[INFO] cloning repository https://github.com/mayanktestweb/leetcode-rust-solutions
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mayanktestweb/leetcode-rust-solutions" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmayanktestweb%2Fleetcode-rust-solutions", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmayanktestweb%2Fleetcode-rust-solutions'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5a651dadafc634a5916707a68b3f544740402a8c
[INFO] checking mayanktestweb/leetcode-rust-solutions against try#ef5216c337126ffe24d074826f4023948c4a9b8e for pr-137033
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmayanktestweb%2Fleetcode-rust-solutions" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mayanktestweb/leetcode-rust-solutions on toolchain ef5216c337126ffe24d074826f4023948c4a9b8e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ef5216c337126ffe24d074826f4023948c4a9b8e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mayanktestweb/leetcode-rust-solutions
[INFO] finished tweaking git repo https://github.com/mayanktestweb/leetcode-rust-solutions
[INFO] tweaked toml for git repo https://github.com/mayanktestweb/leetcode-rust-solutions written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mayanktestweb/leetcode-rust-solutions 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" "+ef5216c337126ffe24d074826f4023948c4a9b8e" "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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+ef5216c337126ffe24d074826f4023948c4a9b8e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 62b5bbb27136d8d09ecdcd6fc2209161ffa2ef0b99cb97e57b59b0448e1f9636
[INFO] running `Command { std: "docker" "start" "-a" "62b5bbb27136d8d09ecdcd6fc2209161ffa2ef0b99cb97e57b59b0448e1f9636", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "62b5bbb27136d8d09ecdcd6fc2209161ffa2ef0b99cb97e57b59b0448e1f9636", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "62b5bbb27136d8d09ecdcd6fc2209161ffa2ef0b99cb97e57b59b0448e1f9636", kill_on_drop: false }`
[INFO] [stdout] 62b5bbb27136d8d09ecdcd6fc2209161ffa2ef0b99cb97e57b59b0448e1f9636
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+ef5216c337126ffe24d074826f4023948c4a9b8e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a9236d6844e452179b23ca8cd46a75b56b7b40f0ea90305f75d32f84e353db0e
[INFO] running `Command { std: "docker" "start" "-a" "a9236d6844e452179b23ca8cd46a75b56b7b40f0ea90305f75d32f84e353db0e", kill_on_drop: false }`
[INFO] [stderr]     Checking leetcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |         return stack.len() == 0;
[INFO] [stdout]    |         ----------------------- any code following this expression is unreachable
[INFO] [stdout] 20 |         
[INFO] [stdout] 21 |         unreachable!();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `unreachable` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |         return stack.len() == 0;
[INFO] [stdout]    |         ----------------------- any code following this expression is unreachable
[INFO] [stdout] 20 |         
[INFO] [stdout] 21 |         unreachable!();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `unreachable` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "a9236d6844e452179b23ca8cd46a75b56b7b40f0ea90305f75d32f84e353db0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9236d6844e452179b23ca8cd46a75b56b7b40f0ea90305f75d32f84e353db0e", kill_on_drop: false }`
[INFO] [stdout] a9236d6844e452179b23ca8cd46a75b56b7b40f0ea90305f75d32f84e353db0e