[INFO] cloning repository intrepion/example-x-rust-x-rustbyexample-com-x-primitives
[INFO] running `"git" "clone" "--bare" "git://github.com/intrepion/example-x-rust-x-rustbyexample-com-x-primitives.git" "work/cache/sources/gh/intrepion/example-x-rust-x-rustbyexample-com-x-primitives"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/intrepion/example-x-rust-x-rustbyexample-com-x-primitives'...
[INFO] running `"git" "clone" "work/cache/sources/gh/intrepion/example-x-rust-x-rustbyexample-com-x-primitives" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/intrepion/example-x-rust-x-rustbyexample-com-x-primitives"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/intrepion/example-x-rust-x-rustbyexample-com-x-primitives'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/intrepion/example-x-rust-x-rustbyexample-com-x-primitives" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/intrepion/example-x-rust-x-rustbyexample-com-x-primitives"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/intrepion/example-x-rust-x-rustbyexample-com-x-primitives'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9f9ca88c557e5223be0fdc4dcb839de8706479e4
[INFO] sha for GitHub repo intrepion/example-x-rust-x-rustbyexample-com-x-primitives: 9f9ca88c557e5223be0fdc4dcb839de8706479e4
[INFO] validating manifest of intrepion/example-x-rust-x-rustbyexample-com-x-primitives on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of intrepion/example-x-rust-x-rustbyexample-com-x-primitives on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing intrepion/example-x-rust-x-rustbyexample-com-x-primitives
[INFO] finished frobbing intrepion/example-x-rust-x-rustbyexample-com-x-primitives
[INFO] frobbed toml for intrepion/example-x-rust-x-rustbyexample-com-x-primitives written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/intrepion/example-x-rust-x-rustbyexample-com-x-primitives/Cargo.toml
[INFO] started frobbing intrepion/example-x-rust-x-rustbyexample-com-x-primitives
[INFO] finished frobbing intrepion/example-x-rust-x-rustbyexample-com-x-primitives
[INFO] frobbed toml for intrepion/example-x-rust-x-rustbyexample-com-x-primitives written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/intrepion/example-x-rust-x-rustbyexample-com-x-primitives/Cargo.toml
[INFO] crate intrepion/example-x-rust-x-rustbyexample-com-x-primitives already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking intrepion/example-x-rust-x-rustbyexample-com-x-primitives against master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-4/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/intrepion/example-x-rust-x-rustbyexample-com-x-primitives:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] ccfcf89155115880406a4ac6b824bc2f684021c0142fd8c6676e5868f1e5da5d
[INFO] running `"docker" "start" "-a" "ccfcf89155115880406a4ac6b824bc2f684021c0142fd8c6676e5868f1e5da5d"`
[INFO] [stderr]     Checking example-x-rust-x-rustbyexample-com-x-primitives v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `logical`
[INFO] [stderr]  --> src/main.rs:3:9
[INFO] [stderr]   |
[INFO] [stderr] 3 |     let logical: bool = true;
[INFO] [stderr]   |         ^^^^^^^ help: consider prefixing with an underscore: `_logical`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a_float`
[INFO] [stderr]  --> src/main.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let a_float: f64 = 1.0;  // Regular annotation
[INFO] [stderr]   |         ^^^^^^^ help: consider prefixing with an underscore: `_a_float`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `an_integer`
[INFO] [stderr]  --> src/main.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let an_integer   = 5i32; // Suffix annotation
[INFO] [stderr]   |         ^^^^^^^^^^ help: consider prefixing with an underscore: `_an_integer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `default_float`
[INFO] [stderr]  --> src/main.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let default_float   = 3.0; // `f64`
[INFO] [stderr]   |         ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_default_float`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `default_integer`
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let default_integer = 7;   // `i32`
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_default_integer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mutable`
[INFO] [stderr]   --> src/main.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let mut mutable = 12; // Mutable `i32`.
[INFO] [stderr]    |             ^^^^^^^ help: consider prefixing with an underscore: `_mutable`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let mut mutable = 12; // Mutable `i32`.
[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: `logical`
[INFO] [stderr]  --> src/main.rs:3:9
[INFO] [stderr]   |
[INFO] [stderr] 3 |     let logical: bool = true;
[INFO] [stderr]   |         ^^^^^^^ help: consider prefixing with an underscore: `_logical`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a_float`
[INFO] [stderr]  --> src/main.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let a_float: f64 = 1.0;  // Regular annotation
[INFO] [stderr]   |         ^^^^^^^ help: consider prefixing with an underscore: `_a_float`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `an_integer`
[INFO] [stderr]  --> src/main.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let an_integer   = 5i32; // Suffix annotation
[INFO] [stderr]   |         ^^^^^^^^^^ help: consider prefixing with an underscore: `_an_integer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `default_float`
[INFO] [stderr]  --> src/main.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let default_float   = 3.0; // `f64`
[INFO] [stderr]   |         ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_default_float`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `default_integer`
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let default_integer = 7;   // `i32`
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_default_integer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mutable`
[INFO] [stderr]   --> src/main.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let mut mutable = 12; // Mutable `i32`.
[INFO] [stderr]    |             ^^^^^^^ help: consider prefixing with an underscore: `_mutable`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let mut mutable = 12; // Mutable `i32`.
[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]     Finished dev [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `"docker" "inspect" "ccfcf89155115880406a4ac6b824bc2f684021c0142fd8c6676e5868f1e5da5d"`
[INFO] running `"docker" "rm" "-f" "ccfcf89155115880406a4ac6b824bc2f684021c0142fd8c6676e5868f1e5da5d"`
[INFO] [stdout] ccfcf89155115880406a4ac6b824bc2f684021c0142fd8c6676e5868f1e5da5d