[INFO] updating cached repository beyran11/MFTRust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/beyran11/MFTRust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/beyran11/MFTRust" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/beyran11/MFTRust"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/beyran11/MFTRust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/beyran11/MFTRust" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/beyran11/MFTRust"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/beyran11/MFTRust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3b738afe0fbad5cd520cadeb04c9712c3d6cbae7
[INFO] sha for GitHub repo beyran11/MFTRust: 3b738afe0fbad5cd520cadeb04c9712c3d6cbae7
[INFO] validating manifest of beyran11/MFTRust on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of beyran11/MFTRust on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing beyran11/MFTRust
[INFO] finished frobbing beyran11/MFTRust
[INFO] frobbed toml for beyran11/MFTRust written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/beyran11/MFTRust/Cargo.toml
[INFO] started frobbing beyran11/MFTRust
[INFO] finished frobbing beyran11/MFTRust
[INFO] frobbed toml for beyran11/MFTRust written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/beyran11/MFTRust/Cargo.toml
[INFO] crate beyran11/MFTRust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking beyran11/MFTRust against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-7/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/beyran11/MFTRust:/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" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] ea1845645345b8d7828727a940f080e10c0293cadf138515d90682f37e68baf4
[INFO] running `"docker" "start" "-a" "ea1845645345b8d7828727a940f080e10c0293cadf138515d90682f37e68baf4"`
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking MFTRust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `sum`
[INFO] [stderr]  --> src/main.rs:3:9
[INFO] [stderr]   |
[INFO] [stderr] 3 |     let sum = 5 + 10;
[INFO] [stderr]   |         ^^^ help: consider prefixing with an underscore: `_sum`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `difference`
[INFO] [stderr]  --> src/main.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let difference = 95.5 - 4.3;
[INFO] [stderr]   |         ^^^^^^^^^^ help: consider prefixing with an underscore: `_difference`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `product`
[INFO] [stderr]  --> src/main.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let product = 4 * 30;
[INFO] [stderr]   |         ^^^^^^^ help: consider prefixing with an underscore: `_product`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tup`
[INFO] [stderr]   --> src/main.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let tup: (i32, f64, u8) = (500, 6.4, 1) ;
[INFO] [stderr]    |         ^^^ help: consider prefixing with an underscore: `_tup`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `first`
[INFO] [stderr]   --> src/main.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let first = a[0];
[INFO] [stderr]    |         ^^^^^ help: consider prefixing with an underscore: `_first`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `second`
[INFO] [stderr]   --> src/main.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let second = a[1];
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_second`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `months`
[INFO] [stderr]   --> src/main.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let months = ["January", "February", "March", "April", "May", "June", "July",
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_months`
[INFO] [stderr] 
[INFO] [stderr] warning: crate `MFTRust` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `mftrust`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sum`
[INFO] [stderr]  --> src/main.rs:3:9
[INFO] [stderr]   |
[INFO] [stderr] 3 |     let sum = 5 + 10;
[INFO] [stderr]   |         ^^^ help: consider prefixing with an underscore: `_sum`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `difference`
[INFO] [stderr]  --> src/main.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let difference = 95.5 - 4.3;
[INFO] [stderr]   |         ^^^^^^^^^^ help: consider prefixing with an underscore: `_difference`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `product`
[INFO] [stderr]  --> src/main.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let product = 4 * 30;
[INFO] [stderr]   |         ^^^^^^^ help: consider prefixing with an underscore: `_product`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tup`
[INFO] [stderr]   --> src/main.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let tup: (i32, f64, u8) = (500, 6.4, 1) ;
[INFO] [stderr]    |         ^^^ help: consider prefixing with an underscore: `_tup`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `first`
[INFO] [stderr]   --> src/main.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let first = a[0];
[INFO] [stderr]    |         ^^^^^ help: consider prefixing with an underscore: `_first`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `second`
[INFO] [stderr]   --> src/main.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let second = a[1];
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_second`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `months`
[INFO] [stderr]   --> src/main.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let months = ["January", "February", "March", "April", "May", "June", "July",
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_months`
[INFO] [stderr] 
[INFO] [stderr] warning: crate `MFTRust` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `mftrust`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.20s
[INFO] running `"docker" "inspect" "ea1845645345b8d7828727a940f080e10c0293cadf138515d90682f37e68baf4"`
[INFO] running `"docker" "rm" "-f" "ea1845645345b8d7828727a940f080e10c0293cadf138515d90682f37e68baf4"`
[INFO] [stdout] ea1845645345b8d7828727a940f080e10c0293cadf138515d90682f37e68baf4