[INFO] cloning repository https://github.com/Ushio-Hayase/TodoRustCLI [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Ushio-Hayase/TodoRustCLI" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUshio-Hayase%2FTodoRustCLI", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUshio-Hayase%2FTodoRustCLI'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 2a1e05749c3eac6f5b826c4bf62ab441a153c092 [INFO] checking Ushio-Hayase/TodoRustCLI 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%2FUshio-Hayase%2FTodoRustCLI" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/Ushio-Hayase/TodoRustCLI [INFO] finished tweaking git repo https://github.com/Ushio-Hayase/TodoRustCLI [INFO] tweaked toml for git repo https://github.com/Ushio-Hayase/TodoRustCLI written to /workspace/builds/worker-5-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/Ushio-Hayase/TodoRustCLI 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/Ushio-Hayase/TodoRustCLI 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] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 2ff0283270a000448061f53b318c52d5b98f38e84bc3113ebe0cef738eceb242 [INFO] running `Command { std: "docker" "start" "-a" "2ff0283270a000448061f53b318c52d5b98f38e84bc3113ebe0cef738eceb242", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "2ff0283270a000448061f53b318c52d5b98f38e84bc3113ebe0cef738eceb242", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2ff0283270a000448061f53b318c52d5b98f38e84bc3113ebe0cef738eceb242", kill_on_drop: false }` [INFO] [stdout] 2ff0283270a000448061f53b318c52d5b98f38e84bc3113ebe0cef738eceb242 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 93e95b65922a1198e4341e337ccf0c2fb88a93750017b7c4ab72a8405d52cdbe [INFO] running `Command { std: "docker" "start" "-a" "93e95b65922a1198e4341e337ccf0c2fb88a93750017b7c4ab72a8405d52cdbe", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.157 [INFO] [stderr] Compiling serde v1.0.208 [INFO] [stderr] Compiling serde_json v1.0.125 [INFO] [stderr] Compiling syn v2.0.74 [INFO] [stderr] Checking parking_lot_core v0.9.10 [INFO] [stderr] Checking socket2 v0.5.7 [INFO] [stderr] Checking signal-hook-registry v1.4.2 [INFO] [stderr] Checking mio v1.0.2 [INFO] [stderr] Checking parking_lot v0.12.3 [INFO] [stderr] Compiling tokio-macros v2.4.0 [INFO] [stderr] Compiling serde_derive v1.0.208 [INFO] [stderr] Checking tokio v1.39.3 [INFO] [stderr] Checking task-cli v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:102:40 [INFO] [stdout] | [INFO] [stdout] 102 | if !Path::exists(Path::new(path)) {File::create(path);} [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 102 | if !Path::exists(Path::new(path)) {let _ = File::create(path);} [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: ControlFlow, std::string::String> [INFO] [stdout] --> src/main.rs:130:15 [INFO] [stdout] | [INFO] [stdout] 130 | buf = String::from_str("[]")?; [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:130:15 [INFO] [stdout] | [INFO] [stdout] 130 | buf = String::from_str("[]")?; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `task-cli` (bin "task-cli" test) due to 2 previous errors; 1 warning emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:102:40 [INFO] [stdout] | [INFO] [stdout] 102 | if !Path::exists(Path::new(path)) {File::create(path);} [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 102 | if !Path::exists(Path::new(path)) {let _ = File::create(path);} [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: ControlFlow, std::string::String> [INFO] [stdout] --> src/main.rs:130:15 [INFO] [stdout] | [INFO] [stdout] 130 | buf = String::from_str("[]")?; [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:130:15 [INFO] [stdout] | [INFO] [stdout] 130 | buf = String::from_str("[]")?; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `task-cli` (bin "task-cli") due to 2 previous errors; 1 warning emitted [INFO] running `Command { std: "docker" "inspect" "93e95b65922a1198e4341e337ccf0c2fb88a93750017b7c4ab72a8405d52cdbe", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "93e95b65922a1198e4341e337ccf0c2fb88a93750017b7c4ab72a8405d52cdbe", kill_on_drop: false }` [INFO] [stdout] 93e95b65922a1198e4341e337ccf0c2fb88a93750017b7c4ab72a8405d52cdbe