[INFO] cloning repository https://github.com/learn-you-a-rust/references [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/learn-you-a-rust/references" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flearn-you-a-rust%2Freferences", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flearn-you-a-rust%2Freferences'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 6ff4ef6f42c370e58278100c0a8e74b01e4b82a9 [INFO] testing learn-you-a-rust/references against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flearn-you-a-rust%2Freferences" "/workspace/builds/worker-80/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-80/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/learn-you-a-rust/references on toolchain 62efba8a050c64249dab942951bb28f710208bc8 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/learn-you-a-rust/references [INFO] finished tweaking git repo https://github.com/learn-you-a-rust/references [INFO] tweaked toml for git repo https://github.com/learn-you-a-rust/references written to /workspace/builds/worker-80/source/Cargo.toml [INFO] crate git repo https://github.com/learn-you-a-rust/references already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] cd98a8100426114ff6eb1bceeb71e533e4812c9f248074ac3619f5d2fb3aa122 [INFO] running `Command { std: "docker" "start" "-a" "cd98a8100426114ff6eb1bceeb71e533e4812c9f248074ac3619f5d2fb3aa122", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "cd98a8100426114ff6eb1bceeb71e533e4812c9f248074ac3619f5d2fb3aa122", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "cd98a8100426114ff6eb1bceeb71e533e4812c9f248074ac3619f5d2fb3aa122", kill_on_drop: false }` [INFO] [stdout] cd98a8100426114ff6eb1bceeb71e533e4812c9f248074ac3619f5d2fb3aa122 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] b3a22b9bc15ba1f4080051fd3d15417752a4cab6ae34dfb99762e4861d9612a5 [INFO] running `Command { std: "docker" "start" "-a" "b3a22b9bc15ba1f4080051fd3d15417752a4cab6ae34dfb99762e4861d9612a5", kill_on_drop: false }` [INFO] [stderr] Compiling references v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `s4` [INFO] [stdout] --> src/main.rs:19:9 [INFO] [stdout] | [INFO] [stdout] 19 | let s4 = &s1; // <-- if this ref exists, &mut s1 refs can't be used [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s4` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s2` [INFO] [stdout] --> src/main.rs:31:13 [INFO] [stdout] | [INFO] [stdout] 31 | let s2 = &mut s1; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `reference_to_nothing` [INFO] [stdout] --> src/main.rs:45:9 [INFO] [stdout] | [INFO] [stdout] 45 | let reference_to_nothing = no_dangle(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_reference_to_nothing` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `some_string` [INFO] [stdout] --> src/main.rs:65:11 [INFO] [stdout] | [INFO] [stdout] 65 | fn change(some_string: &String) { [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_string` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `change` [INFO] [stdout] --> src/main.rs:65:4 [INFO] [stdout] | [INFO] [stdout] 65 | fn change(some_string: &String) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.37s [INFO] running `Command { std: "docker" "inspect" "b3a22b9bc15ba1f4080051fd3d15417752a4cab6ae34dfb99762e4861d9612a5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b3a22b9bc15ba1f4080051fd3d15417752a4cab6ae34dfb99762e4861d9612a5", kill_on_drop: false }` [INFO] [stdout] b3a22b9bc15ba1f4080051fd3d15417752a4cab6ae34dfb99762e4861d9612a5 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 855f8d3c1e423faad5d21d3698e38a543ba52fcc05b4fdc511dce05c98cbbfe3 [INFO] running `Command { std: "docker" "start" "-a" "855f8d3c1e423faad5d21d3698e38a543ba52fcc05b4fdc511dce05c98cbbfe3", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling references v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `s4` [INFO] [stdout] --> src/main.rs:19:9 [INFO] [stdout] | [INFO] [stdout] 19 | let s4 = &s1; // <-- if this ref exists, &mut s1 refs can't be used [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s4` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s2` [INFO] [stdout] --> src/main.rs:31:13 [INFO] [stdout] | [INFO] [stdout] 31 | let s2 = &mut s1; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `reference_to_nothing` [INFO] [stdout] --> src/main.rs:45:9 [INFO] [stdout] | [INFO] [stdout] 45 | let reference_to_nothing = no_dangle(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_reference_to_nothing` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `some_string` [INFO] [stdout] --> src/main.rs:65:11 [INFO] [stdout] | [INFO] [stdout] 65 | fn change(some_string: &String) { [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_string` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `change` [INFO] [stdout] --> src/main.rs:65:4 [INFO] [stdout] | [INFO] [stdout] 65 | fn change(some_string: &String) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.65s [INFO] running `Command { std: "docker" "inspect" "855f8d3c1e423faad5d21d3698e38a543ba52fcc05b4fdc511dce05c98cbbfe3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "855f8d3c1e423faad5d21d3698e38a543ba52fcc05b4fdc511dce05c98cbbfe3", kill_on_drop: false }` [INFO] [stdout] 855f8d3c1e423faad5d21d3698e38a543ba52fcc05b4fdc511dce05c98cbbfe3 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 32511ea264665fdc65890a20c866663a3bbd241bf3d48e540c1344f228e4f7e4 [INFO] running `Command { std: "docker" "start" "-a" "32511ea264665fdc65890a20c866663a3bbd241bf3d48e540c1344f228e4f7e4", kill_on_drop: false }` [INFO] [stderr] warning: unused variable: `s4` [INFO] [stderr] --> src/main.rs:19:9 [INFO] [stderr] | [INFO] [stderr] 19 | let s4 = &s1; // <-- if this ref exists, &mut s1 refs can't be used [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_s4` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s2` [INFO] [stderr] --> src/main.rs:31:13 [INFO] [stderr] | [INFO] [stderr] 31 | let s2 = &mut s1; [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_s2` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `reference_to_nothing` [INFO] [stderr] --> src/main.rs:45:9 [INFO] [stderr] | [INFO] [stderr] 45 | let reference_to_nothing = no_dangle(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_reference_to_nothing` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `some_string` [INFO] [stderr] --> src/main.rs:65:11 [INFO] [stderr] | [INFO] [stderr] 65 | fn change(some_string: &String) { [INFO] [stderr] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_string` [INFO] [stderr] [INFO] [stderr] warning: function is never used: `change` [INFO] [stderr] --> src/main.rs:65:4 [INFO] [stderr] | [INFO] [stderr] 65 | fn change(some_string: &String) { [INFO] [stderr] | ^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: `references` (bin "references" test) generated 5 warnings [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.00s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/references-a8abb66a016f2b4b) [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" "32511ea264665fdc65890a20c866663a3bbd241bf3d48e540c1344f228e4f7e4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "32511ea264665fdc65890a20c866663a3bbd241bf3d48e540c1344f228e4f7e4", kill_on_drop: false }` [INFO] [stdout] 32511ea264665fdc65890a20c866663a3bbd241bf3d48e540c1344f228e4f7e4