[INFO] updating cached repository https://github.com/grwn/cryptopals-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e9fd3d145e148d5810f53fc1d529734351edd08d
[INFO] checking grwn/cryptopals-rust against master#4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb for pr-64672
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrwn%2Fcryptopals-rust" "work/builds/worker-4/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/grwn/cryptopals-rust on toolchain 4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/grwn/cryptopals-rust
[INFO] finished tweaking git repo https://github.com/grwn/cryptopals-rust
[INFO] tweaked toml for git repo https://github.com/grwn/cryptopals-rust written to work/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/grwn/cryptopals-rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 795771c7d9ef8d497eb4f4500117962dbb5d0f5fd604707d3fc8f218a49b01bf
[INFO] running `"docker" "start" "-a" "795771c7d9ef8d497eb4f4500117962dbb5d0f5fd604707d3fc8f218a49b01bf"`
[INFO] [stderr]     Checking cryptopals v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved import `crate::set_1::challenge_6::test_hamming`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::set_1::challenge_6::test_hamming;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `test_hamming` in `set_1::challenge_6`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::set_1::utils::*`
[INFO] [stderr]  --> src/set_1/challenge_6.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::set_1::utils::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `hamming_distance` is imported redundantly
[INFO] [stderr]    --> src/set_1/utils.rs:156:9
[INFO] [stderr]     |
[INFO] [stderr] 148 | / pub fn hamming_distance(string1: &[u8], string2: &[u8]) -> u32 {
[INFO] [stderr] 149 | |     string1.iter()
[INFO] [stderr] 150 | |            .zip(string2)
[INFO] [stderr] 151 | |            .fold(0, |a, (b, c)| a + (*b ^ *c)
[INFO] [stderr] 152 | |            .count_ones())
[INFO] [stderr] 153 | | }
[INFO] [stderr]     | |_- the item `hamming_distance` is already defined here
[INFO] [stderr] ...
[INFO] [stderr] 156 |       use hamming_distance;
[INFO] [stderr]     |           ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::set_1::challenge_6::challenge_6`
[INFO] [stderr]  --> src/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use crate::set_1::challenge_6::challenge_6;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `crate::set_1::challenge_6::test_hamming`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::set_1::challenge_6::test_hamming;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `test_hamming` in `set_1::challenge_6`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::set_1::utils::*`
[INFO] [stderr]  --> src/set_1/challenge_6.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::set_1::utils::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `hamming_distance` is imported redundantly
[INFO] [stderr]    --> src/set_1/utils.rs:156:9
[INFO] [stderr]     |
[INFO] [stderr] 148 | / pub fn hamming_distance(string1: &[u8], string2: &[u8]) -> u32 {
[INFO] [stderr] 149 | |     string1.iter()
[INFO] [stderr] 150 | |            .zip(string2)
[INFO] [stderr] 151 | |            .fold(0, |a, (b, c)| a + (*b ^ *c)
[INFO] [stderr] 152 | |            .count_ones())
[INFO] [stderr] 153 | | }
[INFO] [stderr]     | |_- the item `hamming_distance` is already defined here
[INFO] [stderr] ...
[INFO] [stderr] 156 |       use hamming_distance;
[INFO] [stderr]     |           ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::set_1::challenge_6::challenge_6`
[INFO] [stderr]  --> src/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use crate::set_1::challenge_6::challenge_6;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `cryptopals`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `cryptopals`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "795771c7d9ef8d497eb4f4500117962dbb5d0f5fd604707d3fc8f218a49b01bf"`
[INFO] running `"docker" "rm" "-f" "795771c7d9ef8d497eb4f4500117962dbb5d0f5fd604707d3fc8f218a49b01bf"`
[INFO] [stdout] 795771c7d9ef8d497eb4f4500117962dbb5d0f5fd604707d3fc8f218a49b01bf