[INFO] cloning repository https://github.com/p870613/rust-learn [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/p870613/rust-learn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fp870613%2Frust-learn", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fp870613%2Frust-learn'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 59ce988c1d225b430c0f293c2f0e27fed1e28cfc [INFO] testing p870613/rust-learn against beta-2021-09-08 for beta-1.56-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fp870613%2Frust-learn" "/workspace/builds/worker-6/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/p870613/rust-learn on toolchain beta-2021-09-08 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/p870613/rust-learn [INFO] finished tweaking git repo https://github.com/p870613/rust-learn [INFO] tweaked toml for git repo https://github.com/p870613/rust-learn written to /workspace/builds/worker-6/source/Cargo.toml [INFO] crate git repo https://github.com/p870613/rust-learn already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 8f0342f8e27b82a0753fdc95563f21b1ddd1798b40fc4a71b85ec55b0aa61a6b [INFO] running `Command { std: "docker" "start" "-a" "8f0342f8e27b82a0753fdc95563f21b1ddd1798b40fc4a71b85ec55b0aa61a6b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "8f0342f8e27b82a0753fdc95563f21b1ddd1798b40fc4a71b85ec55b0aa61a6b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "8f0342f8e27b82a0753fdc95563f21b1ddd1798b40fc4a71b85ec55b0aa61a6b", kill_on_drop: false }` [INFO] [stdout] 8f0342f8e27b82a0753fdc95563f21b1ddd1798b40fc4a71b85ec55b0aa61a6b [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] be60612e2f3591a28bde1ab8e4ddff484cb1999cadc52cd9801e19cf447efb8f [INFO] running `Command { std: "docker" "start" "-a" "be60612e2f3591a28bde1ab8e4ddff484cb1999cadc52cd9801e19cf447efb8f", kill_on_drop: false }` [INFO] [stderr] Compiling double_linked_list v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: value assigned to `tmp` is never read [INFO] [stdout] --> src/main.rs:236:13 [INFO] [stdout] | [INFO] [stdout] 236 | let mut tmp = None; [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `tmp2` is never read [INFO] [stdout] --> src/main.rs:237:13 [INFO] [stdout] | [INFO] [stdout] 237 | let mut tmp2 = None; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `tmp3` is never read [INFO] [stdout] --> src/main.rs:238:13 [INFO] [stdout] | [INFO] [stdout] 238 | let mut tmp3 = None; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `del` [INFO] [stdout] --> src/main.rs:86:21 [INFO] [stdout] | [INFO] [stdout] 86 | let del = node.borrow_mut().next.take(); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_del` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `erase` [INFO] [stdout] --> src/main.rs:191:8 [INFO] [stdout] | [INFO] [stdout] 191 | fn erase() {} [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `node_Rc` should have a snake case name [INFO] [stdout] --> src/main.rs:24:26 [INFO] [stdout] | [INFO] [stdout] 24 | Some(node_Rc) => Some(Rc::clone(&node_Rc)), [INFO] [stdout] | ^^^^^^^ help: convert the identifier to snake case: `node_rc` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.86s [INFO] running `Command { std: "docker" "inspect" "be60612e2f3591a28bde1ab8e4ddff484cb1999cadc52cd9801e19cf447efb8f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "be60612e2f3591a28bde1ab8e4ddff484cb1999cadc52cd9801e19cf447efb8f", kill_on_drop: false }` [INFO] [stdout] be60612e2f3591a28bde1ab8e4ddff484cb1999cadc52cd9801e19cf447efb8f [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 68a67e7b640fe2f82e296980825b3e617971748bb01f885eeb4b207c471c2fd7 [INFO] running `Command { std: "docker" "start" "-a" "68a67e7b640fe2f82e296980825b3e617971748bb01f885eeb4b207c471c2fd7", kill_on_drop: false }` [INFO] [stderr] Compiling double_linked_list v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: value assigned to `tmp` is never read [INFO] [stdout] --> src/main.rs:236:13 [INFO] [stdout] | [INFO] [stdout] 236 | let mut tmp = None; [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `tmp2` is never read [INFO] [stdout] --> src/main.rs:237:13 [INFO] [stdout] | [INFO] [stdout] 237 | let mut tmp2 = None; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `tmp3` is never read [INFO] [stdout] --> src/main.rs:238:13 [INFO] [stdout] | [INFO] [stdout] 238 | let mut tmp3 = None; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `del` [INFO] [stdout] --> src/main.rs:86:21 [INFO] [stdout] | [INFO] [stdout] 86 | let del = node.borrow_mut().next.take(); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_del` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `erase` [INFO] [stdout] --> src/main.rs:191:8 [INFO] [stdout] | [INFO] [stdout] 191 | fn erase() {} [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `node_Rc` should have a snake case name [INFO] [stdout] --> src/main.rs:24:26 [INFO] [stdout] | [INFO] [stdout] 24 | Some(node_Rc) => Some(Rc::clone(&node_Rc)), [INFO] [stdout] | ^^^^^^^ help: convert the identifier to snake case: `node_rc` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.52s [INFO] running `Command { std: "docker" "inspect" "68a67e7b640fe2f82e296980825b3e617971748bb01f885eeb4b207c471c2fd7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "68a67e7b640fe2f82e296980825b3e617971748bb01f885eeb4b207c471c2fd7", kill_on_drop: false }` [INFO] [stdout] 68a67e7b640fe2f82e296980825b3e617971748bb01f885eeb4b207c471c2fd7 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 6bdd182a4843fe613eec2c3039e8b77b8fefc707521cd08943a801e46f258adb [INFO] running `Command { std: "docker" "start" "-a" "6bdd182a4843fe613eec2c3039e8b77b8fefc707521cd08943a801e46f258adb", kill_on_drop: false }` [INFO] [stderr] warning: value assigned to `tmp` is never read [INFO] [stderr] --> src/main.rs:236:13 [INFO] [stderr] | [INFO] [stderr] 236 | let mut tmp = None; [INFO] [stderr] | ^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_assignments)]` on by default [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: value assigned to `tmp2` is never read [INFO] [stderr] --> src/main.rs:237:13 [INFO] [stderr] | [INFO] [stderr] 237 | let mut tmp2 = None; [INFO] [stderr] | ^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: value assigned to `tmp3` is never read [INFO] [stderr] --> src/main.rs:238:13 [INFO] [stderr] | [INFO] [stderr] 238 | let mut tmp3 = None; [INFO] [stderr] | ^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `del` [INFO] [stderr] --> src/main.rs:86:21 [INFO] [stderr] | [INFO] [stderr] 86 | let del = node.borrow_mut().next.take(); [INFO] [stderr] | ^^^ help: if this is intentional, prefix it with an underscore: `_del` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `erase` [INFO] [stderr] --> src/main.rs:191:8 [INFO] [stderr] | [INFO] [stderr] 191 | fn erase() {} [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable `node_Rc` should have a snake case name [INFO] [stderr] --> src/main.rs:24:26 [INFO] [stderr] | [INFO] [stderr] 24 | Some(node_Rc) => Some(Rc::clone(&node_Rc)), [INFO] [stderr] | ^^^^^^^ help: convert the identifier to snake case: `node_rc` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(non_snake_case)]` on by default [INFO] [stderr] [INFO] [stderr] warning: `double_linked_list` (bin "double_linked_list" test) generated 6 warnings [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.00s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/double_linked_list-afa74cb9b8bea25b) [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" "6bdd182a4843fe613eec2c3039e8b77b8fefc707521cd08943a801e46f258adb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6bdd182a4843fe613eec2c3039e8b77b8fefc707521cd08943a801e46f258adb", kill_on_drop: false }` [INFO] [stdout] 6bdd182a4843fe613eec2c3039e8b77b8fefc707521cd08943a801e46f258adb