[INFO] updating cached repository rustkas/rust-101-impl
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rustkas/rust-101-impl
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rustkas/rust-101-impl" "work/ex/beta-1.38-1/sources/1.37.0/gh/rustkas/rust-101-impl"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/rustkas/rust-101-impl'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rustkas/rust-101-impl" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rustkas/rust-101-impl"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rustkas/rust-101-impl'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 613d00f4626de92ead3dc7534fc6f94a73e95cfb
[INFO] sha for GitHub repo rustkas/rust-101-impl: 613d00f4626de92ead3dc7534fc6f94a73e95cfb
[INFO] validating manifest of rustkas/rust-101-impl on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rustkas/rust-101-impl on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rustkas/rust-101-impl
[INFO] finished frobbing rustkas/rust-101-impl
[INFO] frobbed toml for rustkas/rust-101-impl written to work/ex/beta-1.38-1/sources/1.37.0/gh/rustkas/rust-101-impl/Cargo.toml
[INFO] started frobbing rustkas/rust-101-impl
[INFO] finished frobbing rustkas/rust-101-impl
[INFO] frobbed toml for rustkas/rust-101-impl written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rustkas/rust-101-impl/Cargo.toml
[INFO] crate rustkas/rust-101-impl already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing rustkas/rust-101-impl against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/rustkas/rust-101-impl:/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=warn" "-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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 2aceb7f5dacc4c8ba7f8e6588d7bdbb58a9e5e9c57b9d3a313a4e9d5dd3c0092
[INFO] running `"docker" "start" "-a" "2aceb7f5dacc4c8ba7f8e6588d7bdbb58a9e5e9c57b9d3a313a4e9d5dd3c0092"`
[INFO] [stderr]    Compiling rust-101 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `el`
[INFO] [stderr]   --> src/part0.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     for el in vec {
[INFO] [stderr]    |         ^^ help: consider prefixing with an underscore: `_el`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/part0.rs:35:20
[INFO] [stderr]    |
[INFO] [stderr] 35 |             Number(n) => {
[INFO] [stderr]    |                    ^ help: consider prefixing with an underscore: `_n`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/part0.rs:70:28
[INFO] [stderr]    |
[INFO] [stderr] 70 | fn print_number_or_nothing(n: NumberOrNothing) {
[INFO] [stderr]    |                            ^ help: consider prefixing with an underscore: `_n`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/part0.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let mut min = Nothing;
[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: variant is never constructed: `Number`
[INFO] [stderr]   --> src/part0.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Number(i32),
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `min_i32`
[INFO] [stderr]   --> src/part0.rs:45:1
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn min_i32(a: i32, b: i32) -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `"docker" "inspect" "2aceb7f5dacc4c8ba7f8e6588d7bdbb58a9e5e9c57b9d3a313a4e9d5dd3c0092"`
[INFO] running `"docker" "rm" "-f" "2aceb7f5dacc4c8ba7f8e6588d7bdbb58a9e5e9c57b9d3a313a4e9d5dd3c0092"`
[INFO] [stdout] 2aceb7f5dacc4c8ba7f8e6588d7bdbb58a9e5e9c57b9d3a313a4e9d5dd3c0092
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/rustkas/rust-101-impl:/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=warn" "-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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 0f841bd56243c1aaa9c9c4ffa4edc6287873876fe69f360ffc71d2b205e88a7c
[INFO] running `"docker" "start" "-a" "0f841bd56243c1aaa9c9c4ffa4edc6287873876fe69f360ffc71d2b205e88a7c"`
[INFO] [stderr]    Compiling rust-101 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `el`
[INFO] [stderr]   --> src/part0.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     for el in vec {
[INFO] [stderr]    |         ^^ help: consider prefixing with an underscore: `_el`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/part0.rs:35:20
[INFO] [stderr]    |
[INFO] [stderr] 35 |             Number(n) => {
[INFO] [stderr]    |                    ^ help: consider prefixing with an underscore: `_n`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/part0.rs:70:28
[INFO] [stderr]    |
[INFO] [stderr] 70 | fn print_number_or_nothing(n: NumberOrNothing) {
[INFO] [stderr]    |                            ^ help: consider prefixing with an underscore: `_n`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/part0.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let mut min = Nothing;
[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: variant is never constructed: `Number`
[INFO] [stderr]   --> src/part0.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Number(i32),
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `min_i32`
[INFO] [stderr]   --> src/part0.rs:45:1
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn min_i32(a: i32, b: i32) -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.10s
[INFO] running `"docker" "inspect" "0f841bd56243c1aaa9c9c4ffa4edc6287873876fe69f360ffc71d2b205e88a7c"`
[INFO] running `"docker" "rm" "-f" "0f841bd56243c1aaa9c9c4ffa4edc6287873876fe69f360ffc71d2b205e88a7c"`
[INFO] [stdout] 0f841bd56243c1aaa9c9c4ffa4edc6287873876fe69f360ffc71d2b205e88a7c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/rustkas/rust-101-impl:/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=warn" "-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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 442d24b10c05d51bc9e3262461fb004b5c5dfefbf44e06dbdfcb4475a1d0b45d
[INFO] running `"docker" "start" "-a" "442d24b10c05d51bc9e3262461fb004b5c5dfefbf44e06dbdfcb4475a1d0b45d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/part0-4848db0620346e76
[INFO] [stderr]      Running /opt/crater/target/debug/deps/part01-a67c381015710da0
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/part02-d37a785f649c0e0b
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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
[INFO] [stdout] 
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "442d24b10c05d51bc9e3262461fb004b5c5dfefbf44e06dbdfcb4475a1d0b45d"`
[INFO] running `"docker" "rm" "-f" "442d24b10c05d51bc9e3262461fb004b5c5dfefbf44e06dbdfcb4475a1d0b45d"`
[INFO] [stdout] 442d24b10c05d51bc9e3262461fb004b5c5dfefbf44e06dbdfcb4475a1d0b45d