Dec 19 12:22:18.817 INFO checking mplanchard/combinations against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 12:22:18.817 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-6/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/mplanchard/combinations:/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"`
Dec 19 12:22:19.155 INFO [stdout] 6af3bbc2cf14bc6b5997df6842815496067bfa61c5710a8d8b4aea2b5f03a631
Dec 19 12:22:19.157 INFO running `"docker" "start" "-a" "6af3bbc2cf14bc6b5997df6842815496067bfa61c5710a8d8b4aea2b5f03a631"`
Dec 19 12:22:20.367 INFO [stderr]     Checking num-complex v0.2.1
Dec 19 12:22:21.298 INFO [stderr]     Checking num v0.2.0
Dec 19 12:22:21.516 INFO [stderr]     Checking combinations v0.1.0 (/opt/crater/workdir)
Dec 19 12:22:21.739 INFO [stderr] warning: unused import: `std::slice`
Dec 19 12:22:21.739 INFO [stderr]  --> src/main.rs:6:5
Dec 19 12:22:21.739 INFO [stderr]   |
Dec 19 12:22:21.739 INFO [stderr] 6 | use std::slice;
Dec 19 12:22:21.739 INFO [stderr]   |     ^^^^^^^^^^
Dec 19 12:22:21.739 INFO [stderr]   |
Dec 19 12:22:21.739 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 12:22:21.739 INFO [stderr] 
Dec 19 12:22:21.781 INFO [stderr] warning: unused import: `std::slice`
Dec 19 12:22:21.784 INFO [stderr]  --> src/main.rs:6:5
Dec 19 12:22:21.784 INFO [stderr]   |
Dec 19 12:22:21.784 INFO [stderr] 6 | use std::slice;
Dec 19 12:22:21.784 INFO [stderr]   |     ^^^^^^^^^^
Dec 19 12:22:21.784 INFO [stderr]   |
Dec 19 12:22:21.784 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 12:22:21.784 INFO [stderr] 
Dec 19 12:22:21.825 INFO [stderr] warning: unused variable: `slice_one`
Dec 19 12:22:21.825 INFO [stderr]    --> src/main.rs:123:9
Dec 19 12:22:21.826 INFO [stderr]     |
Dec 19 12:22:21.826 INFO [stderr] 123 |     let slice_one: &[i32] = &[1, 2, 3, 4, 5];
Dec 19 12:22:21.826 INFO [stderr]     |         ^^^^^^^^^ help: consider using `_slice_one` instead
Dec 19 12:22:21.826 INFO [stderr]     |
Dec 19 12:22:21.826 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 19 12:22:21.826 INFO [stderr] 
Dec 19 12:22:21.828 INFO [stderr] warning: unused variable: `slice_two`
Dec 19 12:22:21.828 INFO [stderr]    --> src/main.rs:124:9
Dec 19 12:22:21.828 INFO [stderr]     |
Dec 19 12:22:21.828 INFO [stderr] 124 |     let slice_two: &[i32] = &[3, 4];
Dec 19 12:22:21.828 INFO [stderr]     |         ^^^^^^^^^ help: consider using `_slice_two` instead
Dec 19 12:22:21.828 INFO [stderr] 
Dec 19 12:22:21.854 INFO [stderr] warning: function is never used: `num_combinations`
Dec 19 12:22:21.854 INFO [stderr]   --> src/main.rs:19:1
Dec 19 12:22:21.855 INFO [stderr]    |
Dec 19 12:22:21.855 INFO [stderr] 19 | fn num_combinations(num_items: u64, take: u64) -> BigUint {
Dec 19 12:22:21.855 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:22:21.855 INFO [stderr] 
Dec 19 12:22:21.855 INFO [stderr] warning: function is never used: `print`
Dec 19 12:22:21.856 INFO [stderr]   --> src/main.rs:62:1
Dec 19 12:22:21.856 INFO [stderr]    |
Dec 19 12:22:21.856 INFO [stderr] 62 | fn print<T: Iterator + std::fmt::Debug>(thing: T) -> T{
Dec 19 12:22:21.856 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:22:21.856 INFO [stderr] 
Dec 19 12:22:21.860 INFO [stderr] warning: unused variable: `slice_one`
Dec 19 12:22:21.860 INFO [stderr]    --> src/main.rs:123:9
Dec 19 12:22:21.860 INFO [stderr]     |
Dec 19 12:22:21.860 INFO [stderr] 123 |     let slice_one: &[i32] = &[1, 2, 3, 4, 5];
Dec 19 12:22:21.860 INFO [stderr]     |         ^^^^^^^^^ help: consider using `_slice_one` instead
Dec 19 12:22:21.860 INFO [stderr]     |
Dec 19 12:22:21.860 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 19 12:22:21.860 INFO [stderr] 
Dec 19 12:22:21.865 INFO [stderr] warning: unused variable: `slice_two`
Dec 19 12:22:21.865 INFO [stderr]    --> src/main.rs:124:9
Dec 19 12:22:21.865 INFO [stderr]     |
Dec 19 12:22:21.865 INFO [stderr] 124 |     let slice_two: &[i32] = &[3, 4];
Dec 19 12:22:21.865 INFO [stderr]     |         ^^^^^^^^^ help: consider using `_slice_two` instead
Dec 19 12:22:21.865 INFO [stderr] 
Dec 19 12:22:21.896 INFO [stderr] warning: function is never used: `num_combinations`
Dec 19 12:22:21.896 INFO [stderr]   --> src/main.rs:19:1
Dec 19 12:22:21.896 INFO [stderr]    |
Dec 19 12:22:21.896 INFO [stderr] 19 | fn num_combinations(num_items: u64, take: u64) -> BigUint {
Dec 19 12:22:21.896 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:22:21.896 INFO [stderr] 
Dec 19 12:22:21.896 INFO [stderr] warning: function is never used: `print`
Dec 19 12:22:21.896 INFO [stderr]   --> src/main.rs:62:1
Dec 19 12:22:21.896 INFO [stderr]    |
Dec 19 12:22:21.896 INFO [stderr] 62 | fn print<T: Iterator + std::fmt::Debug>(thing: T) -> T{
Dec 19 12:22:21.896 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:22:21.896 INFO [stderr] 
Dec 19 12:22:21.912 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.59s
Dec 19 12:22:22.292 INFO running `"docker" "inspect" "6af3bbc2cf14bc6b5997df6842815496067bfa61c5710a8d8b4aea2b5f03a631"`
Dec 19 12:22:22.394 INFO running `"docker" "rm" "-f" "6af3bbc2cf14bc6b5997df6842815496067bfa61c5710a8d8b4aea2b5f03a631"`
Dec 19 12:22:22.518 INFO [stdout] 6af3bbc2cf14bc6b5997df6842815496067bfa61c5710a8d8b4aea2b5f03a631