[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/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/rustkas/rust-101-impl"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/rustkas/rust-101-impl'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rustkas/rust-101-impl" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/rustkas/rust-101-impl"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/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 master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rustkas/rust-101-impl on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "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/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/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/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/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" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking rustkas/rust-101-impl against master#0f88167f89fffe321590c5148f21b7d51d44388d for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-0/master#0f88167f89fffe321590c5148f21b7d51d44388d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/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=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" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 38b9ad6a3600cf401e93be8af13de3d3f5fd2db35e8d226c90ddfcc74c1ecaa4
[INFO] running `"docker" "start" "-a" "38b9ad6a3600cf401e93be8af13de3d3f5fd2db35e8d226c90ddfcc74c1ecaa4"`
[INFO] [stderr]     Checking 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] 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 0.64s
[INFO] running `"docker" "inspect" "38b9ad6a3600cf401e93be8af13de3d3f5fd2db35e8d226c90ddfcc74c1ecaa4"`
[INFO] running `"docker" "rm" "-f" "38b9ad6a3600cf401e93be8af13de3d3f5fd2db35e8d226c90ddfcc74c1ecaa4"`
[INFO] [stdout] 38b9ad6a3600cf401e93be8af13de3d3f5fd2db35e8d226c90ddfcc74c1ecaa4