[INFO] updating cached repository Ragnyll/rust_variables
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Ragnyll/rust_variables
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Ragnyll/rust_variables" "work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/gh/Ragnyll/rust_variables"`
[INFO] [stderr] Cloning into 'work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/gh/Ragnyll/rust_variables'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Ragnyll/rust_variables" "work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/gh/Ragnyll/rust_variables"`
[INFO] [stderr] Cloning into 'work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/gh/Ragnyll/rust_variables'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b02e8595809a2dca3ba21af362c3cbb664c264de
[INFO] sha for GitHub repo Ragnyll/rust_variables: b02e8595809a2dca3ba21af362c3cbb664c264de
[INFO] validating manifest of Ragnyll/rust_variables on toolchain master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Ragnyll/rust_variables on toolchain try#29640c57b5f92febba0e40c50cb863c9a7ede51d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+29640c57b5f92febba0e40c50cb863c9a7ede51d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Ragnyll/rust_variables
[INFO] finished frobbing Ragnyll/rust_variables
[INFO] frobbed toml for Ragnyll/rust_variables written to work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/gh/Ragnyll/rust_variables/Cargo.toml
[INFO] started frobbing Ragnyll/rust_variables
[INFO] finished frobbing Ragnyll/rust_variables
[INFO] frobbed toml for Ragnyll/rust_variables written to work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/gh/Ragnyll/rust_variables/Cargo.toml
[INFO] crate Ragnyll/rust_variables has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+29640c57b5f92febba0e40c50cb863c9a7ede51d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking Ragnyll/rust_variables against try#29640c57b5f92febba0e40c50cb863c9a7ede51d for pr-57745
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57745/worker-3/try#29640c57b5f92febba0e40c50cb863c9a7ede51d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/gh/Ragnyll/rust_variables:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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" "+29640c57b5f92febba0e40c50cb863c9a7ede51d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f4d4bb23e93740fd7a0f32431fb0c05a9b8e0348be216764a34f22f0a51f30bf
[INFO] running `"docker" "start" "-a" "f4d4bb23e93740fd7a0f32431fb0c05a9b8e0348be216764a34f22f0a51f30bf"`
[INFO] [stderr]     Checking variables v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `difference`
[INFO] [stderr]   --> src/main.rs:41:9
[INFO] [stderr]    |
[INFO] [stderr] 41 |     let difference = 95.5 - 4.3;
[INFO] [stderr]    |         ^^^^^^^^^^ help: consider using `_difference` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `product`
[INFO] [stderr]   --> src/main.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 44 |     let product = 4 * 30;
[INFO] [stderr]    |         ^^^^^^^ help: consider using `_product` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `quotient`
[INFO] [stderr]   --> src/main.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 47 |     let quotient = 56.7 / 32.2;
[INFO] [stderr]    |         ^^^^^^^^ help: consider using `_quotient` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `remainder`
[INFO] [stderr]   --> src/main.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |     let remainder = 43 % 5;
[INFO] [stderr]    |         ^^^^^^^^^ help: consider using `_remainder` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/main.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |     let t = true; // without explicit type annotation
[INFO] [stderr]    |         ^ help: consider using `_t` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/main.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 |     let f: bool = false; // with explicit type annotation
[INFO] [stderr]    |         ^ help: consider using `_f` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/main.rs:59:10
[INFO] [stderr]    |
[INFO] [stderr] 59 |     let (x, y, z) = tup;
[INFO] [stderr]    |          ^ help: consider using `_x` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `z`
[INFO] [stderr]   --> src/main.rs:59:16
[INFO] [stderr]    |
[INFO] [stderr] 59 |     let (x, y, z) = tup;
[INFO] [stderr]    |                ^ help: consider using `_z` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `first`
[INFO] [stderr]   --> src/main.rs:67:9
[INFO] [stderr]    |
[INFO] [stderr] 67 |     let first = months[0];
[INFO] [stderr]    |         ^^^^^ help: consider using `_first` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `difference`
[INFO] [stderr]   --> src/main.rs:41:9
[INFO] [stderr]    |
[INFO] [stderr] 41 |     let difference = 95.5 - 4.3;
[INFO] [stderr]    |         ^^^^^^^^^^ help: consider using `_difference` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `product`
[INFO] [stderr]   --> src/main.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 44 |     let product = 4 * 30;
[INFO] [stderr]    |         ^^^^^^^ help: consider using `_product` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `quotient`
[INFO] [stderr]   --> src/main.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 47 |     let quotient = 56.7 / 32.2;
[INFO] [stderr]    |         ^^^^^^^^ help: consider using `_quotient` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `remainder`
[INFO] [stderr]   --> src/main.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |     let remainder = 43 % 5;
[INFO] [stderr]    |         ^^^^^^^^^ help: consider using `_remainder` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/main.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |     let t = true; // without explicit type annotation
[INFO] [stderr]    |         ^ help: consider using `_t` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/main.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 |     let f: bool = false; // with explicit type annotation
[INFO] [stderr]    |         ^ help: consider using `_f` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/main.rs:59:10
[INFO] [stderr]    |
[INFO] [stderr] 59 |     let (x, y, z) = tup;
[INFO] [stderr]    |          ^ help: consider using `_x` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `z`
[INFO] [stderr]   --> src/main.rs:59:16
[INFO] [stderr]    |
[INFO] [stderr] 59 |     let (x, y, z) = tup;
[INFO] [stderr]    |                ^ help: consider using `_z` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `first`
[INFO] [stderr]   --> src/main.rs:67:9
[INFO] [stderr]    |
[INFO] [stderr] 67 |     let first = months[0];
[INFO] [stderr]    |         ^^^^^ help: consider using `_first` instead
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `"docker" "inspect" "f4d4bb23e93740fd7a0f32431fb0c05a9b8e0348be216764a34f22f0a51f30bf"`
[INFO] running `"docker" "rm" "-f" "f4d4bb23e93740fd7a0f32431fb0c05a9b8e0348be216764a34f22f0a51f30bf"`
[INFO] [stdout] f4d4bb23e93740fd7a0f32431fb0c05a9b8e0348be216764a34f22f0a51f30bf