[INFO] cloning repository https://github.com/Ermain-12/Introduction-to-Rust [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Ermain-12/Introduction-to-Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FErmain-12%2FIntroduction-to-Rust", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FErmain-12%2FIntroduction-to-Rust'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 19db755187092c11f3f3ea13092682fc7bc92786 [INFO] testing Ermain-12/Introduction-to-Rust against 1.55.0 for beta-1.56-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FErmain-12%2FIntroduction-to-Rust" "/workspace/builds/worker-9/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/Ermain-12/Introduction-to-Rust on toolchain 1.55.0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/Ermain-12/Introduction-to-Rust [INFO] finished tweaking git repo https://github.com/Ermain-12/Introduction-to-Rust [INFO] tweaked toml for git repo https://github.com/Ermain-12/Introduction-to-Rust written to /workspace/builds/worker-9/source/Cargo.toml [INFO] crate git repo https://github.com/Ermain-12/Introduction-to-Rust already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] ff34b7968e6503d2d373e0386735e6e36c50dd549d8997acd26d2f4bfeca8933 [INFO] running `Command { std: "docker" "start" "-a" "ff34b7968e6503d2d373e0386735e6e36c50dd549d8997acd26d2f4bfeca8933", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "ff34b7968e6503d2d373e0386735e6e36c50dd549d8997acd26d2f4bfeca8933", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ff34b7968e6503d2d373e0386735e6e36c50dd549d8997acd26d2f4bfeca8933", kill_on_drop: false }` [INFO] [stdout] ff34b7968e6503d2d373e0386735e6e36c50dd549d8997acd26d2f4bfeca8933 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] a4f8a510531952999f3b5b76144f1a3ca29f8ff091b986b7a71a44ff10301bc3 [INFO] running `Command { std: "docker" "start" "-a" "a4f8a510531952999f3b5b76144f1a3ca29f8ff091b986b7a71a44ff10301bc3", kill_on_drop: false }` [INFO] [stderr] Compiling memchr v2.0.1 [INFO] [stderr] Compiling time v0.1.40 [INFO] [stderr] Compiling aho-corasick v0.6.4 [INFO] [stderr] Compiling regex v1.0.0 [INFO] [stderr] Compiling hello_world v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:27:8 [INFO] [stdout] | [INFO] [stdout] 27 | let mut twenty_one = my_vec.pop(); [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: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 8.04s [INFO] running `Command { std: "docker" "inspect" "a4f8a510531952999f3b5b76144f1a3ca29f8ff091b986b7a71a44ff10301bc3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a4f8a510531952999f3b5b76144f1a3ca29f8ff091b986b7a71a44ff10301bc3", kill_on_drop: false }` [INFO] [stdout] a4f8a510531952999f3b5b76144f1a3ca29f8ff091b986b7a71a44ff10301bc3 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] e9fcd3636f65cbcee85c03b3e007500014f04a0befd26e0aa2832fd48dde0511 [INFO] running `Command { std: "docker" "start" "-a" "e9fcd3636f65cbcee85c03b3e007500014f04a0befd26e0aa2832fd48dde0511", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling hello_world v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:27:8 [INFO] [stdout] | [INFO] [stdout] 27 | let mut twenty_one = my_vec.pop(); [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] [stderr] Finished test [unoptimized + debuginfo] target(s) in 1.01s [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "e9fcd3636f65cbcee85c03b3e007500014f04a0befd26e0aa2832fd48dde0511", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e9fcd3636f65cbcee85c03b3e007500014f04a0befd26e0aa2832fd48dde0511", kill_on_drop: false }` [INFO] [stdout] e9fcd3636f65cbcee85c03b3e007500014f04a0befd26e0aa2832fd48dde0511 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 54cc024354070d842486e94d7d92b8a1b98d761ba5bb3acaa9794d25c8a2c8f6 [INFO] running `Command { std: "docker" "start" "-a" "54cc024354070d842486e94d7d92b8a1b98d761ba5bb3acaa9794d25c8a2c8f6", kill_on_drop: false }` [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:27:8 [INFO] [stderr] | [INFO] [stderr] 27 | let mut twenty_one = my_vec.pop(); [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: `hello_world` (bin "hello_world" test) generated 1 warning [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.06s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/hello_world-c5cd4189fcbcd12f) [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" "54cc024354070d842486e94d7d92b8a1b98d761ba5bb3acaa9794d25c8a2c8f6", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "54cc024354070d842486e94d7d92b8a1b98d761ba5bb3acaa9794d25c8a2c8f6", kill_on_drop: false }` [INFO] [stdout] 54cc024354070d842486e94d7d92b8a1b98d761ba5bb3acaa9794d25c8a2c8f6