[INFO] cloning repository https://github.com/zrubing/leetcode [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zrubing/leetcode" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzrubing%2Fleetcode"` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzrubing%2Fleetcode'... [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 52efebaec2175505d62cb0f7ff1f9b6239f79579 [INFO] checking zrubing/leetcode against master#3dbade652ed8ebac70f903e01f51cd92c4e4302c for pr-69880 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzrubing%2Fleetcode" "/workspace/builds/worker-5/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/zrubing/leetcode on toolchain 3dbade652ed8ebac70f903e01f51cd92c4e4302c [INFO] running `"/workspace/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/zrubing/leetcode [INFO] finished tweaking git repo https://github.com/zrubing/leetcode [INFO] tweaked toml for git repo https://github.com/zrubing/leetcode written to /workspace/builds/worker-5/source/Cargo.toml [INFO] crate git repo https://github.com/zrubing/leetcode already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"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=forbid" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "check" "--frozen" "--all" "--all-targets"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] c695fcef0d38e8f1f5897d44bd0bf258583c4079ad1fe3f6f8cb122d565716d3 [INFO] running `"docker" "start" "-a" "c695fcef0d38e8f1f5897d44bd0bf258583c4079ad1fe3f6f8cb122d565716d3"` [INFO] [stderr] Checking rust_learn v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: unused variable: `node` [INFO] [stderr] --> src/main.rs:82:13 [INFO] [stderr] | [INFO] [stderr] 82 | let mut node: Option> = None; [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_node` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `first_new_node` [INFO] [stderr] --> src/main.rs:95:13 [INFO] [stderr] | [INFO] [stderr] 95 | let mut first_new_node: Option> = None; [INFO] [stderr] | ^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_first_new_node` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:82:9 [INFO] [stderr] | [INFO] [stderr] 82 | let mut node: Option> = None; [INFO] [stderr] | ----^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:95:9 [INFO] [stderr] | [INFO] [stderr] 95 | let mut first_new_node: Option> = None; [INFO] [stderr] | ----^^^^^^^^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: method is never used: `new` [INFO] [stderr] --> src/main.rs:72:5 [INFO] [stderr] | [INFO] [stderr] 72 | fn new(val: i32) -> Self { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `node` [INFO] [stderr] --> src/main.rs:82:13 [INFO] [stderr] | [INFO] [stderr] 82 | let mut node: Option> = None; [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_node` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `first_new_node` [INFO] [stderr] --> src/main.rs:95:13 [INFO] [stderr] | [INFO] [stderr] 95 | let mut first_new_node: Option> = None; [INFO] [stderr] | ^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_first_new_node` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:82:9 [INFO] [stderr] | [INFO] [stderr] 82 | let mut node: Option> = None; [INFO] [stderr] | ----^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:95:9 [INFO] [stderr] | [INFO] [stderr] 95 | let mut first_new_node: Option> = None; [INFO] [stderr] | ----^^^^^^^^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: method is never used: `new` [INFO] [stderr] --> src/main.rs:72:5 [INFO] [stderr] | [INFO] [stderr] 72 | fn new(val: i32) -> Self { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.75s [INFO] running `"docker" "inspect" "c695fcef0d38e8f1f5897d44bd0bf258583c4079ad1fe3f6f8cb122d565716d3"` [INFO] running `"docker" "rm" "-f" "c695fcef0d38e8f1f5897d44bd0bf258583c4079ad1fe3f6f8cb122d565716d3"` [INFO] [stdout] c695fcef0d38e8f1f5897d44bd0bf258583c4079ad1fe3f6f8cb122d565716d3