[INFO] updating cached repository AnthonyBroadCrawford/rust-koans
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/AnthonyBroadCrawford/rust-koans
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/AnthonyBroadCrawford/rust-koans" "work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/AnthonyBroadCrawford/rust-koans"`
[INFO] [stderr] Cloning into 'work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/AnthonyBroadCrawford/rust-koans'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/AnthonyBroadCrawford/rust-koans" "work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/AnthonyBroadCrawford/rust-koans"`
[INFO] [stderr] Cloning into 'work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/AnthonyBroadCrawford/rust-koans'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5c7689c94be38a2e2951eed0089a0b38c64b72f5
[INFO] sha for GitHub repo AnthonyBroadCrawford/rust-koans: 5c7689c94be38a2e2951eed0089a0b38c64b72f5
[INFO] validating manifest of AnthonyBroadCrawford/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 AnthonyBroadCrawford/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 AnthonyBroadCrawford/rust-koans
[INFO] finished frobbing AnthonyBroadCrawford/rust-koans
[INFO] frobbed toml for AnthonyBroadCrawford/rust-koans written to work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/AnthonyBroadCrawford/rust-koans/Cargo.toml
[INFO] started frobbing AnthonyBroadCrawford/rust-koans
[INFO] finished frobbing AnthonyBroadCrawford/rust-koans
[INFO] frobbed toml for AnthonyBroadCrawford/rust-koans written to work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/AnthonyBroadCrawford/rust-koans/Cargo.toml
[INFO] crate AnthonyBroadCrawford/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 AnthonyBroadCrawford/rust-koans against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/AnthonyBroadCrawford/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 83ef19f1a7f30bb811b20e54419addcf4057a5b8e67ad239e78589a2dec9817f
[INFO] running `"docker" "start" "-a" "83ef19f1a7f30bb811b20e54419addcf4057a5b8e67ad239e78589a2dec9817f"`
[INFO] [stderr]     Checking rust-koans v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `add_two`
[INFO] [stderr]  --> tests/about_documentation.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | fn add_two(to_be_added_to: i32) -> i32{
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `add_two`
[INFO] [stderr]  --> tests/about_documentation.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | fn add_two(to_be_added_to: i32) -> i32{
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `"docker" "inspect" "83ef19f1a7f30bb811b20e54419addcf4057a5b8e67ad239e78589a2dec9817f"`
[INFO] running `"docker" "rm" "-f" "83ef19f1a7f30bb811b20e54419addcf4057a5b8e67ad239e78589a2dec9817f"`
[INFO] [stdout] 83ef19f1a7f30bb811b20e54419addcf4057a5b8e67ad239e78589a2dec9817f