[INFO] cloning repository https://github.com/IamTheLime/leetcode_rs [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/IamTheLime/leetcode_rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIamTheLime%2Fleetcode_rs", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIamTheLime%2Fleetcode_rs'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] de51dbd197e9775adc18b1a2f089b8bdb832f904 [INFO] checking IamTheLime/leetcode_rs against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIamTheLime%2Fleetcode_rs" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/IamTheLime/leetcode_rs [INFO] finished tweaking git repo https://github.com/IamTheLime/leetcode_rs [INFO] tweaked toml for git repo https://github.com/IamTheLime/leetcode_rs written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/IamTheLime/leetcode_rs on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/IamTheLime/leetcode_rs 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 7210692cf3819b7b1a1b76135ee29bdf2d88d9729870c6be1853ca26a53db5c5 [INFO] running `Command { std: "docker" "start" "-a" "7210692cf3819b7b1a1b76135ee29bdf2d88d9729870c6be1853ca26a53db5c5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "7210692cf3819b7b1a1b76135ee29bdf2d88d9729870c6be1853ca26a53db5c5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7210692cf3819b7b1a1b76135ee29bdf2d88d9729870c6be1853ca26a53db5c5", kill_on_drop: false }` [INFO] [stdout] 7210692cf3819b7b1a1b76135ee29bdf2d88d9729870c6be1853ca26a53db5c5 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 5c983ef2edb1e10b18bff1ee5eb07dc9d4e81f31b6a03fd44f5580ad4bffee57 [INFO] running `Command { std: "docker" "start" "-a" "5c983ef2edb1e10b18bff1ee5eb07dc9d4e81f31b6a03fd44f5580ad4bffee57", kill_on_drop: false }` [INFO] [stderr] Checking leetcode v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused imports: `borrow::BorrowMut`, `fmt::Display`, `iter::Enumerate`, `ops::Index`, and `process::ExitStatus` [INFO] [stdout] --> src/main.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | borrow::BorrowMut, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] 3 | collections::HashMap, [INFO] [stdout] 4 | fmt::Display, [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] 5 | iter::Enumerate, [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] 6 | ops::Index, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] 7 | process::ExitStatus, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: useless assignment of variable of type `i32` to itself [INFO] [stdout] --> src/main.rs:212:5 [INFO] [stdout] | [INFO] [stdout] 212 | value = value; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `add_node` is never used [INFO] [stdout] --> src/main.rs:111:8 [INFO] [stdout] | [INFO] [stdout] 105 | impl ListNode { [INFO] [stdout] | ------------- method in this implementation [INFO] [stdout] ... [INFO] [stdout] 111 | fn add_node(&mut self, val: i32) -> &mut Box { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:257:30 [INFO] [stdout] | [INFO] [stdout] 257 | let mut prefix: String = String::from_str("").unwrap(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: requested on the command line with `-D unmustuse-in-always-ok` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:310:9 [INFO] [stdout] | [INFO] [stdout] 310 | String::from_str("booooo").unwrap(), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:311:9 [INFO] [stdout] | [INFO] [stdout] 311 | String::from_str("boor").unwrap(), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `borrow::BorrowMut`, `fmt::Display`, `iter::Enumerate`, `ops::Index`, and `process::ExitStatus` [INFO] [stdout] --> src/main.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | borrow::BorrowMut, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] 3 | collections::HashMap, [INFO] [stdout] 4 | fmt::Display, [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] 5 | iter::Enumerate, [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] 6 | ops::Index, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] 7 | process::ExitStatus, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `leetcode` (bin "leetcode") due to 3 previous errors; 3 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: useless assignment of variable of type `i32` to itself [INFO] [stdout] --> src/main.rs:212:5 [INFO] [stdout] | [INFO] [stdout] 212 | value = value; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `add_node` is never used [INFO] [stdout] --> src/main.rs:111:8 [INFO] [stdout] | [INFO] [stdout] 105 | impl ListNode { [INFO] [stdout] | ------------- method in this implementation [INFO] [stdout] ... [INFO] [stdout] 111 | fn add_node(&mut self, val: i32) -> &mut Box { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:257:30 [INFO] [stdout] | [INFO] [stdout] 257 | let mut prefix: String = String::from_str("").unwrap(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: requested on the command line with `-D unmustuse-in-always-ok` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:310:9 [INFO] [stdout] | [INFO] [stdout] 310 | String::from_str("booooo").unwrap(), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:311:9 [INFO] [stdout] | [INFO] [stdout] 311 | String::from_str("boor").unwrap(), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `leetcode` (bin "leetcode" test) due to 3 previous errors; 3 warnings emitted [INFO] running `Command { std: "docker" "inspect" "5c983ef2edb1e10b18bff1ee5eb07dc9d4e81f31b6a03fd44f5580ad4bffee57", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5c983ef2edb1e10b18bff1ee5eb07dc9d4e81f31b6a03fd44f5580ad4bffee57", kill_on_drop: false }` [INFO] [stdout] 5c983ef2edb1e10b18bff1ee5eb07dc9d4e81f31b6a03fd44f5580ad4bffee57