[INFO] updating cached repository EFulmer/rust-koans
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/EFulmer/rust-koans
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/EFulmer/rust-koans" "work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/EFulmer/rust-koans"`
[INFO] [stderr] Cloning into 'work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/EFulmer/rust-koans'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/EFulmer/rust-koans" "work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/EFulmer/rust-koans"`
[INFO] [stderr] Cloning into 'work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/EFulmer/rust-koans'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 134b0f6c91fedc5cc0b447d92a3cfd8e1fc472e9
[INFO] sha for GitHub repo EFulmer/rust-koans: 134b0f6c91fedc5cc0b447d92a3cfd8e1fc472e9
[INFO] validating manifest of EFulmer/rust-koans on toolchain master#d99a320cba42f661aebfa1293b7b2ec3603dda75
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of EFulmer/rust-koans on toolchain try#e70472fc501b855c9080f3772432c10fe20b8866
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing EFulmer/rust-koans
[INFO] finished frobbing EFulmer/rust-koans
[INFO] frobbed toml for EFulmer/rust-koans written to work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/EFulmer/rust-koans/Cargo.toml
[INFO] started frobbing EFulmer/rust-koans
[INFO] finished frobbing EFulmer/rust-koans
[INFO] frobbed toml for EFulmer/rust-koans written to work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/EFulmer/rust-koans/Cargo.toml
[INFO] crate EFulmer/rust-koans has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking EFulmer/rust-koans against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-3/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/EFulmer/rust-koans:/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] bdfa71a93aaa3b134fc7f394fbf458bbb5d4884d335fbd3441c3417db10c5d6e
[INFO] running `"docker" "start" "-a" "bdfa71a93aaa3b134fc7f394fbf458bbb5d4884d335fbd3441c3417db10c5d6e"`
[INFO] [stderr]     Checking rust-koans v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `util::*`
[INFO] [stderr]  --> src/about_asserts.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use util::*;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_eq`
[INFO] [stderr]  --> src/util.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn test_eq<T: Any + Debug, U: Any + Debug + PartialEq>(actual: T, expected: U) 
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_true`
[INFO] [stderr]   --> src/util.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub fn test_true<T: Any + Debug + PartialEq>(v: T) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_true`
[INFO] [stderr]   --> src/util.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub fn test_true<T: Any + Debug + PartialEq>(v: T) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `"docker" "inspect" "bdfa71a93aaa3b134fc7f394fbf458bbb5d4884d335fbd3441c3417db10c5d6e"`
[INFO] running `"docker" "rm" "-f" "bdfa71a93aaa3b134fc7f394fbf458bbb5d4884d335fbd3441c3417db10c5d6e"`
[INFO] [stdout] bdfa71a93aaa3b134fc7f394fbf458bbb5d4884d335fbd3441c3417db10c5d6e