[INFO] cloning repository https://github.com/Chibadoii/rust_1 [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Chibadoii/rust_1" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChibadoii%2Frust_1", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChibadoii%2Frust_1'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 5ed432c1a049ea65dbb3f6d51748055dc595f522 [INFO] checking Chibadoii/rust_1 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%2FChibadoii%2Frust_1" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/Chibadoii/rust_1 [INFO] finished tweaking git repo https://github.com/Chibadoii/rust_1 [INFO] tweaked toml for git repo https://github.com/Chibadoii/rust_1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/Chibadoii/rust_1 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/Chibadoii/rust_1 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] f00185ea6f2e5ac6ff5ede1d3268f04d4f65d2f9708e6810a1337d40e75995d6 [INFO] running `Command { std: "docker" "start" "-a" "f00185ea6f2e5ac6ff5ede1d3268f04d4f65d2f9708e6810a1337d40e75995d6", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f00185ea6f2e5ac6ff5ede1d3268f04d4f65d2f9708e6810a1337d40e75995d6", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f00185ea6f2e5ac6ff5ede1d3268f04d4f65d2f9708e6810a1337d40e75995d6", kill_on_drop: false }` [INFO] [stdout] f00185ea6f2e5ac6ff5ede1d3268f04d4f65d2f9708e6810a1337d40e75995d6 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 66b619b5448513fd2c41412adec7c27d4aa44171eaa5c67f1da804eae9a82f18 [INFO] running `Command { std: "docker" "start" "-a" "66b619b5448513fd2c41412adec7c27d4aa44171eaa5c67f1da804eae9a82f18", kill_on_drop: false }` [INFO] [stderr] Checking rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:20:13 [INFO] [stdout] | [INFO] [stdout] 20 | let mut cal_str: String = item1.parse().expect("Err str in str"); [INFO] [stdout] | ----^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:21:13 [INFO] [stdout] | [INFO] [stdout] 21 | let mut rev_call_str = cal_str.chars().rev().collect::>(); [INFO] [stdout] | ----^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:20:35 [INFO] [stdout] | [INFO] [stdout] 20 | let mut cal_str: String = item1.parse().expect("Err str in 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] warning: unused borrow that must be used [INFO] [stdout] --> src/main.rs:44:9 [INFO] [stdout] | [INFO] [stdout] 44 | &mut combo_string.push(**&f_char); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [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] 44 | let _ = &mut combo_string.push(**&f_char); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/main.rs:45:9 [INFO] [stdout] | [INFO] [stdout] 45 | &mut combo_string.push(**&l_char); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 45 | let _ = &mut combo_string.push(**&l_char); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/main.rs:51:12 [INFO] [stdout] | [INFO] [stdout] 51 | &mut couples_num.push(parsed_number); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 51 | let _ = &mut couples_num.push(parsed_number); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/main.rs:52:12 [INFO] [stdout] | [INFO] [stdout] 52 | &mut combo_string.clear(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 52 | let _ = &mut combo_string.clear(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:20:13 [INFO] [stdout] | [INFO] [stdout] 20 | let mut cal_str: String = item1.parse().expect("Err str in str"); [INFO] [stdout] | ----^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `rust` (bin "rust" test) due to 1 previous error; 6 warnings emitted [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:21:13 [INFO] [stdout] | [INFO] [stdout] 21 | let mut rev_call_str = cal_str.chars().rev().collect::>(); [INFO] [stdout] | ----^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:20:35 [INFO] [stdout] | [INFO] [stdout] 20 | let mut cal_str: String = item1.parse().expect("Err str in 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] warning: unused borrow that must be used [INFO] [stdout] --> src/main.rs:44:9 [INFO] [stdout] | [INFO] [stdout] 44 | &mut combo_string.push(**&f_char); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [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] 44 | let _ = &mut combo_string.push(**&f_char); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/main.rs:45:9 [INFO] [stdout] | [INFO] [stdout] 45 | &mut combo_string.push(**&l_char); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 45 | let _ = &mut combo_string.push(**&l_char); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/main.rs:51:12 [INFO] [stdout] | [INFO] [stdout] 51 | &mut couples_num.push(parsed_number); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 51 | let _ = &mut couples_num.push(parsed_number); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/main.rs:52:12 [INFO] [stdout] | [INFO] [stdout] 52 | &mut combo_string.clear(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 52 | let _ = &mut combo_string.clear(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `rust` (bin "rust") due to 1 previous error; 6 warnings emitted [INFO] running `Command { std: "docker" "inspect" "66b619b5448513fd2c41412adec7c27d4aa44171eaa5c67f1da804eae9a82f18", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "66b619b5448513fd2c41412adec7c27d4aa44171eaa5c67f1da804eae9a82f18", kill_on_drop: false }` [INFO] [stdout] 66b619b5448513fd2c41412adec7c27d4aa44171eaa5c67f1da804eae9a82f18