[INFO] cloning repository https://github.com/illionillion/rust-learning-docs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/illionillion/rust-learning-docs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fillionillion%2Frust-learning-docs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fillionillion%2Frust-learning-docs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c884cd19f966ca577524d67138f444a1b5fb97cb
[INFO] testing illionillion/rust-learning-docs against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fillionillion%2Frust-learning-docs" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/illionillion/rust-learning-docs
[INFO] finished tweaking git repo https://github.com/illionillion/rust-learning-docs
[INFO] tweaked toml for git repo https://github.com/illionillion/rust-learning-docs written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/illionillion/rust-learning-docs on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/illionillion/rust-learning-docs 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" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aa9ed9ee85ab51667067929e842b0dceeb23004da7ba1f2ee150cfe0c498518a
[INFO] running `Command { std: "docker" "start" "-a" "aa9ed9ee85ab51667067929e842b0dceeb23004da7ba1f2ee150cfe0c498518a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa9ed9ee85ab51667067929e842b0dceeb23004da7ba1f2ee150cfe0c498518a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa9ed9ee85ab51667067929e842b0dceeb23004da7ba1f2ee150cfe0c498518a", kill_on_drop: false }`
[INFO] [stdout] aa9ed9ee85ab51667067929e842b0dceeb23004da7ba1f2ee150cfe0c498518a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 759e8cb1d60eb686847a3db764726c964e6441fb5342c7588aa977b83e7ec34d
[INFO] running `Command { std: "docker" "start" "-a" "759e8cb1d60eb686847a3db764726c964e6441fb5342c7588aa977b83e7ec34d", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-learning-docs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `Command { std: "docker" "inspect" "759e8cb1d60eb686847a3db764726c964e6441fb5342c7588aa977b83e7ec34d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "759e8cb1d60eb686847a3db764726c964e6441fb5342c7588aa977b83e7ec34d", kill_on_drop: false }`
[INFO] [stdout] 759e8cb1d60eb686847a3db764726c964e6441fb5342c7588aa977b83e7ec34d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 36a85693de64060db7060314b3cecff5983ca89ff9b307195e758912a063b7b9
[INFO] running `Command { std: "docker" "start" "-a" "36a85693de64060db7060314b3cecff5983ca89ff9b307195e758912a063b7b9", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-learning-docs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `logical`
[INFO] [stdout]  --> examples/data-types.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let logical: bool = true;
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_logical`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a_float`
[INFO] [stdout]  --> examples/data-types.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let a_float: f64 = 1.0;  // Regular annotation
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_a_float`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `an_integer`
[INFO] [stdout]  --> examples/data-types.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let an_integer   = 5i32; // Suffix annotation
[INFO] [stdout]   |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_an_integer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `default_float`
[INFO] [stdout]   --> examples/data-types.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let default_float   = 3.0; // `f64`
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_float`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `default_integer`
[INFO] [stdout]   --> examples/data-types.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let default_integer = 7;   // `i32`
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_integer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `inferred_type` is assigned to, but never used
[INFO] [stdout]   --> examples/data-types.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut inferred_type = 12; // Type i64 is inferred from another line.
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_inferred_type` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `mutable` is assigned to, but never used
[INFO] [stdout]   --> examples/data-types.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut mutable = 12; // Mutable `i32`
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_mutable` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mutable`
[INFO] [stdout]   --> examples/data-types.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let mutable = true;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mutable`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `inferred_type` is never read
[INFO] [stdout]   --> examples/data-types.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     inferred_type = 4294967296i64;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `mutable` is never read
[INFO] [stdout]   --> examples/data-types.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     mutable = 21;
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "36a85693de64060db7060314b3cecff5983ca89ff9b307195e758912a063b7b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36a85693de64060db7060314b3cecff5983ca89ff9b307195e758912a063b7b9", kill_on_drop: false }`
[INFO] [stdout] 36a85693de64060db7060314b3cecff5983ca89ff9b307195e758912a063b7b9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 08aa3bff33adfc394c7ba0fc42ff6c28d0480c20de2dce6f60aeee3ada494c58
[INFO] running `Command { std: "docker" "start" "-a" "08aa3bff33adfc394c7ba0fc42ff6c28d0480c20de2dce6f60aeee3ada494c58", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `logical`
[INFO] [stderr]  --> examples/data-types.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let logical: bool = true;
[INFO] [stderr]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_logical`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a_float`
[INFO] [stderr]  --> examples/data-types.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let a_float: f64 = 1.0;  // Regular annotation
[INFO] [stderr]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_a_float`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `an_integer`
[INFO] [stderr]  --> examples/data-types.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let an_integer   = 5i32; // Suffix annotation
[INFO] [stderr]   |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_an_integer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `default_float`
[INFO] [stderr]   --> examples/data-types.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let default_float   = 3.0; // `f64`
[INFO] [stderr]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_float`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `default_integer`
[INFO] [stderr]   --> examples/data-types.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let default_integer = 7;   // `i32`
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_integer`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `inferred_type` is assigned to, but never used
[INFO] [stderr]   --> examples/data-types.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let mut inferred_type = 12; // Type i64 is inferred from another line.
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_inferred_type` instead
[INFO] [stderr] 
[INFO] [stderr] warning: variable `mutable` is assigned to, but never used
[INFO] [stderr]   --> examples/data-types.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let mut mutable = 12; // Mutable `i32`
[INFO] [stderr]    |         ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_mutable` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mutable`
[INFO] [stderr]   --> examples/data-types.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let mutable = true;
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mutable`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `inferred_type` is never read
[INFO] [stderr]   --> examples/data-types.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     inferred_type = 4294967296i64;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `mutable` is never read
[INFO] [stderr]   --> examples/data-types.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     mutable = 21;
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-learning-docs` (example "data-types") generated 10 warnings (run `cargo fix --example "data-types" -p rust-learning-docs` to apply 6 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_learning_docs-e9342556a907465a)
[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" "08aa3bff33adfc394c7ba0fc42ff6c28d0480c20de2dce6f60aeee3ada494c58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08aa3bff33adfc394c7ba0fc42ff6c28d0480c20de2dce6f60aeee3ada494c58", kill_on_drop: false }`
[INFO] [stdout] 08aa3bff33adfc394c7ba0fc42ff6c28d0480c20de2dce6f60aeee3ada494c58