[INFO] cloning repository https://github.com/frerich/rustbf [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/frerich/rustbf" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrerich%2Frustbf", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrerich%2Frustbf'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] a7b077970b925f6ca17aefe4c3083742a012ad00 [INFO] checking frerich/rustbf 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%2Ffrerich%2Frustbf" "/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/frerich/rustbf [INFO] finished tweaking git repo https://github.com/frerich/rustbf [INFO] tweaked toml for git repo https://github.com/frerich/rustbf written to /workspace/builds/worker-6-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/frerich/rustbf 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/frerich/rustbf 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] 97470497e1c60d545d74fb1106f346bb6d862dc7567468eaf0eefe646566ef1a [INFO] running `Command { std: "docker" "start" "-a" "97470497e1c60d545d74fb1106f346bb6d862dc7567468eaf0eefe646566ef1a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "97470497e1c60d545d74fb1106f346bb6d862dc7567468eaf0eefe646566ef1a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "97470497e1c60d545d74fb1106f346bb6d862dc7567468eaf0eefe646566ef1a", kill_on_drop: false }` [INFO] [stdout] 97470497e1c60d545d74fb1106f346bb6d862dc7567468eaf0eefe646566ef1a [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] 556528efb0a1805d5ca68114c4d1e6d41dfe7234c26b8e6f788ee2f3e4033bbe [INFO] running `Command { std: "docker" "start" "-a" "556528efb0a1805d5ca68114c4d1e6d41dfe7234c26b8e6f788ee2f3e4033bbe", kill_on_drop: false }` [INFO] [stderr] Checking rustbf v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: method `run` is never used [INFO] [stdout] --> src/main.rs:206:8 [INFO] [stdout] | [INFO] [stdout] 198 | impl Machine { [INFO] [stdout] | ------------ method in this implementation [INFO] [stdout] ... [INFO] [stdout] 206 | fn run(self: &mut Machine, program: &BFProgram) -> io::Result<()> { [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:78:59 [INFO] [stdout] | [INFO] [stdout] 78 | fn parse(code: &str) -> Result { [INFO] [stdout] | ___________________________________________________________^ [INFO] [stdout] 79 | | let mut programs = Vec::new(); [INFO] [stdout] 80 | | programs.push(BFProgram::new()); [INFO] [stdout] ... | [INFO] [stdout] 100 | | Ok( programs.pop().unwrap() ) [INFO] [stdout] 101 | | } [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:100:9 [INFO] [stdout] | [INFO] [stdout] 100 | Ok( programs.pop().unwrap() ) [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:354:11 [INFO] [stdout] | [INFO] [stdout] 354 | match BFProgram::parse(&code) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:360:13 [INFO] [stdout] | [INFO] [stdout] 360 | machine.run_optimized(&optimized_program); [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] 360 | let _ = machine.run_optimized(&optimized_program); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `rustbf` (bin "rustbf" test) due to 3 previous errors; 2 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: method `run` is never used [INFO] [stdout] --> src/main.rs:206:8 [INFO] [stdout] | [INFO] [stdout] 198 | impl Machine { [INFO] [stdout] | ------------ method in this implementation [INFO] [stdout] ... [INFO] [stdout] 206 | fn run(self: &mut Machine, program: &BFProgram) -> io::Result<()> { [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:78:59 [INFO] [stdout] | [INFO] [stdout] 78 | fn parse(code: &str) -> Result { [INFO] [stdout] | ___________________________________________________________^ [INFO] [stdout] 79 | | let mut programs = Vec::new(); [INFO] [stdout] 80 | | programs.push(BFProgram::new()); [INFO] [stdout] ... | [INFO] [stdout] 100 | | Ok( programs.pop().unwrap() ) [INFO] [stdout] 101 | | } [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:100:9 [INFO] [stdout] | [INFO] [stdout] 100 | Ok( programs.pop().unwrap() ) [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:354:11 [INFO] [stdout] | [INFO] [stdout] 354 | match BFProgram::parse(&code) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:360:13 [INFO] [stdout] | [INFO] [stdout] 360 | machine.run_optimized(&optimized_program); [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] 360 | let _ = machine.run_optimized(&optimized_program); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `rustbf` (bin "rustbf") due to 3 previous errors; 2 warnings emitted [INFO] running `Command { std: "docker" "inspect" "556528efb0a1805d5ca68114c4d1e6d41dfe7234c26b8e6f788ee2f3e4033bbe", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "556528efb0a1805d5ca68114c4d1e6d41dfe7234c26b8e6f788ee2f3e4033bbe", kill_on_drop: false }` [INFO] [stdout] 556528efb0a1805d5ca68114c4d1e6d41dfe7234c26b8e6f788ee2f3e4033bbe