[INFO] cloning repository https://github.com/trinitronx/rust-understanding-ownership [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/trinitronx/rust-understanding-ownership" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrinitronx%2Frust-understanding-ownership", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrinitronx%2Frust-understanding-ownership'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 57778d31155d6500a7cecc437d5dc85fcf3a1d2b [INFO] testing trinitronx/rust-understanding-ownership against try#17092ad00ed8fe1e7f81a7e38238ff70779034b1 for pr-140985 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrinitronx%2Frust-understanding-ownership" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/trinitronx/rust-understanding-ownership on toolchain 17092ad00ed8fe1e7f81a7e38238ff70779034b1 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/trinitronx/rust-understanding-ownership [INFO] finished tweaking git repo https://github.com/trinitronx/rust-understanding-ownership [INFO] tweaked toml for git repo https://github.com/trinitronx/rust-understanding-ownership written to /workspace/builds/worker-1-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/trinitronx/rust-understanding-ownership 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" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 3d5be2713f7043ea3add2468db88bf1f1ce8abe45d028df640335787c0b95b4a [INFO] running `Command { std: "docker" "start" "-a" "3d5be2713f7043ea3add2468db88bf1f1ce8abe45d028df640335787c0b95b4a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "3d5be2713f7043ea3add2468db88bf1f1ce8abe45d028df640335787c0b95b4a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3d5be2713f7043ea3add2468db88bf1f1ce8abe45d028df640335787c0b95b4a", kill_on_drop: false }` [INFO] [stdout] 3d5be2713f7043ea3add2468db88bf1f1ce8abe45d028df640335787c0b95b4a [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 0033b28c180da60379ba3308292a2a8fcc28c849ff41ec9d0224561189fa18a9 [INFO] running `Command { std: "docker" "start" "-a" "0033b28c180da60379ba3308292a2a8fcc28c849ff41ec9d0224561189fa18a9", kill_on_drop: false }` [INFO] [stderr] Compiling understanding-ownership v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `s1` [INFO] [stdout] --> src/main.rs:154:9 [INFO] [stdout] | [INFO] [stdout] 154 | let s1 = gives_ownership(); // gives_ownership moves its return [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s3` [INFO] [stdout] --> src/main.rs:159:9 [INFO] [stdout] | [INFO] [stdout] 159 | let s3 = takes_and_gives_back(s2); // s2 is moved into [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s3` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> src/main.rs:262:13 [INFO] [stdout] | [INFO] [stdout] 262 | let r1 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r2` [INFO] [stdout] --> src/main.rs:265:9 [INFO] [stdout] | [INFO] [stdout] 265 | let r2 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:270:9 [INFO] [stdout] | [INFO] [stdout] 270 | let mut s = String::from("hello"); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word` [INFO] [stdout] --> src/main.rs:353:9 [INFO] [stdout] | [INFO] [stdout] 353 | let word = first_word(&s); // word will get the value 5 [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.21s [INFO] running `Command { std: "docker" "inspect" "0033b28c180da60379ba3308292a2a8fcc28c849ff41ec9d0224561189fa18a9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0033b28c180da60379ba3308292a2a8fcc28c849ff41ec9d0224561189fa18a9", kill_on_drop: false }` [INFO] [stdout] 0033b28c180da60379ba3308292a2a8fcc28c849ff41ec9d0224561189fa18a9 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] b15697701aa36a6f41447c6cea7606968425356c6b67e0e92d15de8fbbff0b36 [INFO] running `Command { std: "docker" "start" "-a" "b15697701aa36a6f41447c6cea7606968425356c6b67e0e92d15de8fbbff0b36", kill_on_drop: false }` [INFO] [stderr] Compiling understanding-ownership v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `s1` [INFO] [stdout] --> src/main.rs:154:9 [INFO] [stdout] | [INFO] [stdout] 154 | let s1 = gives_ownership(); // gives_ownership moves its return [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s3` [INFO] [stdout] --> src/main.rs:159:9 [INFO] [stdout] | [INFO] [stdout] 159 | let s3 = takes_and_gives_back(s2); // s2 is moved into [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s3` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> src/main.rs:262:13 [INFO] [stdout] | [INFO] [stdout] 262 | let r1 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r2` [INFO] [stdout] --> src/main.rs:265:9 [INFO] [stdout] | [INFO] [stdout] 265 | let r2 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:270:9 [INFO] [stdout] | [INFO] [stdout] 270 | let mut s = String::from("hello"); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word` [INFO] [stdout] --> src/main.rs:353:9 [INFO] [stdout] | [INFO] [stdout] 353 | let word = first_word(&s); // word will get the value 5 [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.13s [INFO] running `Command { std: "docker" "inspect" "b15697701aa36a6f41447c6cea7606968425356c6b67e0e92d15de8fbbff0b36", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b15697701aa36a6f41447c6cea7606968425356c6b67e0e92d15de8fbbff0b36", kill_on_drop: false }` [INFO] [stdout] b15697701aa36a6f41447c6cea7606968425356c6b67e0e92d15de8fbbff0b36 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 1e0898a33808536226beeeead09dbdf70c964751b9f5470d4c6307234a9698aa [INFO] running `Command { std: "docker" "start" "-a" "1e0898a33808536226beeeead09dbdf70c964751b9f5470d4c6307234a9698aa", kill_on_drop: false }` [INFO] [stderr] warning: unused variable: `s1` [INFO] [stderr] --> src/main.rs:154:9 [INFO] [stderr] | [INFO] [stderr] 154 | let s1 = gives_ownership(); // gives_ownership moves its return [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_s1` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s3` [INFO] [stderr] --> src/main.rs:159:9 [INFO] [stderr] | [INFO] [stderr] 159 | let s3 = takes_and_gives_back(s2); // s2 is moved into [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_s3` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r1` [INFO] [stderr] --> src/main.rs:262:13 [INFO] [stderr] | [INFO] [stderr] 262 | let r1 = &mut s; [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r2` [INFO] [stderr] --> src/main.rs:265:9 [INFO] [stderr] | [INFO] [stderr] 265 | let r2 = &mut s; [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_r2` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:270:9 [INFO] [stderr] | [INFO] [stderr] 270 | let mut s = String::from("hello"); [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: unused variable: `word` [INFO] [stderr] --> src/main.rs:353:9 [INFO] [stderr] | [INFO] [stderr] 353 | let word = first_word(&s); // word will get the value 5 [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stderr] [INFO] [stderr] warning: `understanding-ownership` (bin "understanding-ownership" test) generated 6 warnings (run `cargo fix --bin "understanding-ownership" --tests` to apply 1 suggestion) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/understanding_ownership-60e58babe567bafe) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "1e0898a33808536226beeeead09dbdf70c964751b9f5470d4c6307234a9698aa", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1e0898a33808536226beeeead09dbdf70c964751b9f5470d4c6307234a9698aa", kill_on_drop: false }` [INFO] [stdout] 1e0898a33808536226beeeead09dbdf70c964751b9f5470d4c6307234a9698aa