[INFO] cloning repository https://github.com/wucheng/leetcode-rust [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wucheng/leetcode-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwucheng%2Fleetcode-rust", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwucheng%2Fleetcode-rust'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 31af7426ee4af600f3c11e98886b3cc44e46af88 [INFO] checking wucheng/leetcode-rust against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwucheng%2Fleetcode-rust" "/workspace/builds/worker-6/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/wucheng/leetcode-rust on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/wucheng/leetcode-rust [INFO] finished tweaking git repo https://github.com/wucheng/leetcode-rust [INFO] tweaked toml for git repo https://github.com/wucheng/leetcode-rust written to /workspace/builds/worker-6/source/Cargo.toml [INFO] crate git repo https://github.com/wucheng/leetcode-rust already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", 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] bbe9be370be3026a50bd80ac375e211ac3031406d2fc73713e96859a8e1a01c9 [INFO] running `Command { std: "docker" "start" "-a" "bbe9be370be3026a50bd80ac375e211ac3031406d2fc73713e96859a8e1a01c9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "bbe9be370be3026a50bd80ac375e211ac3031406d2fc73713e96859a8e1a01c9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "bbe9be370be3026a50bd80ac375e211ac3031406d2fc73713e96859a8e1a01c9", kill_on_drop: false }` [INFO] [stdout] bbe9be370be3026a50bd80ac375e211ac3031406d2fc73713e96859a8e1a01c9 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] d5e2edd2125423444eaa1439f3b0fc713c60086e6f7fa902beadb551e619bb9a [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" "d5e2edd2125423444eaa1439f3b0fc713c60086e6f7fa902beadb551e619bb9a", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.47 [INFO] [stderr] Checking rand_xorshift v0.1.1 [INFO] [stderr] Checking rand_isaac v0.1.1 [INFO] [stderr] Checking rand_hc v0.1.0 [INFO] [stderr] Compiling rand v0.6.4 [INFO] [stderr] Compiling rand_pcg v0.1.1 [INFO] [stderr] Checking rand_chacha v0.1.1 [INFO] [stderr] Checking rand_os v0.1.1 [INFO] [stderr] Checking leetcode_rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unreachable expression [INFO] [stdout] --> src/s0617_merge_two_binary_trees/merge_two_binary_trees.rs:25:9 [INFO] [stdout] | [INFO] [stdout] 9 | / match (t1, t2) { [INFO] [stdout] 10 | | (None, None) => return None, [INFO] [stdout] 11 | | (Some(t1_rc), None) => return Some(t1_rc.clone()), [INFO] [stdout] 12 | | (None, Some(t2_rc)) => return Some(t2_rc.clone()), [INFO] [stdout] ... | [INFO] [stdout] 22 | | } [INFO] [stdout] 23 | | } [INFO] [stdout] | |_________- any code following this `match` expression is unreachable, as all arms diverge [INFO] [stdout] 24 | #[warn(unreachable_code)] [INFO] [stdout] 25 | unreachable!() [INFO] [stdout] | ^^^^^^^^^^^^^^ unreachable expression [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 expression [INFO] [stdout] --> src/s0617_merge_two_binary_trees/merge_two_binary_trees.rs:25:9 [INFO] [stdout] | [INFO] [stdout] 9 | / match (t1, t2) { [INFO] [stdout] 10 | | (None, None) => return None, [INFO] [stdout] 11 | | (Some(t1_rc), None) => return Some(t1_rc.clone()), [INFO] [stdout] 12 | | (None, Some(t2_rc)) => return Some(t2_rc.clone()), [INFO] [stdout] ... | [INFO] [stdout] 22 | | } [INFO] [stdout] 23 | | } [INFO] [stdout] | |_________- any code following this `match` expression is unreachable, as all arms diverge [INFO] [stdout] 24 | #[warn(unreachable_code)] [INFO] [stdout] 25 | unreachable!() [INFO] [stdout] | ^^^^^^^^^^^^^^ unreachable expression [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: struct is never constructed: `Solution` [INFO] [stdout] --> src/s0206_reverse_linked_list/reverse_linked_list.rs:3:12 [INFO] [stdout] | [INFO] [stdout] 3 | pub 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: `reverse_list` [INFO] [stdout] --> src/s0206_reverse_linked_list/reverse_linked_list.rs:6:12 [INFO] [stdout] | [INFO] [stdout] 6 | pub fn reverse_list(head: Option>) -> Option> { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct is never constructed: `Solution` [INFO] [stdout] --> src/s0617_merge_two_binary_trees/merge_two_binary_trees.rs:6:12 [INFO] [stdout] | [INFO] [stdout] 6 | pub struct Solution; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `merge_trees` [INFO] [stdout] --> src/s0617_merge_two_binary_trees/merge_two_binary_trees.rs:8:12 [INFO] [stdout] | [INFO] [stdout] 8 | pub fn merge_trees(t1: Option>>, t2: Option>>) -> Option>> { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/s0206_reverse_linked_list/reverse_linked_list.rs:39:13 [INFO] [stdout] | [INFO] [stdout] 39 | let mut third_node = ListNode::new(3); [INFO] [stdout] | ----^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 4.75s [INFO] running `Command { std: "docker" "inspect" "d5e2edd2125423444eaa1439f3b0fc713c60086e6f7fa902beadb551e619bb9a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d5e2edd2125423444eaa1439f3b0fc713c60086e6f7fa902beadb551e619bb9a", kill_on_drop: false }` [INFO] [stdout] d5e2edd2125423444eaa1439f3b0fc713c60086e6f7fa902beadb551e619bb9a