[INFO] updating cached repository https://github.com/Dirlandets/rust-udemy
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/Dirlandets/rust-udemy
[INFO] [stderr]    6138b6a..e235d8c  master     -> master
[INFO] [stderr]    6138b6a..104f255  part_4     -> part_4
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e235d8ce23e5638b208af905f51e833a352fe302
[INFO] checking Dirlandets/rust-udemy against master#914adf04af1c1a984707f778da3d04590c03d144 for pr-72331
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDirlandets%2Frust-udemy" "/workspace/builds/worker-9/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Dirlandets/rust-udemy on toolchain 914adf04af1c1a984707f778da3d04590c03d144
[INFO] running `"/workspace/cargo-home/bin/cargo" "+914adf04af1c1a984707f778da3d04590c03d144" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Dirlandets/rust-udemy
[INFO] finished tweaking git repo https://github.com/Dirlandets/rust-udemy
[INFO] tweaked toml for git repo https://github.com/Dirlandets/rust-udemy written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/Dirlandets/rust-udemy already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+914adf04af1c1a984707f778da3d04590c03d144" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-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" "+914adf04af1c1a984707f778da3d04590c03d144" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b4789a583fc3fcf76bf6f4cd140aa19fa2b3ba433c9c877413c1c3a367474770
[INFO] running `"docker" "start" "-a" "b4789a583fc3fcf76bf6f4cd140aa19fa2b3ba433c9c877413c1c3a367474770"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]     Checking bytesize v1.0.0
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking nom v3.2.1
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking systemstat v0.1.5
[INFO] [stderr]     Checking course v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/part_4_data_structures/enums.rs:98:9
[INFO] [stderr]    |
[INFO] [stderr] 98 |         _ => String::from("SOME COLOR")
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `State`
[INFO] [stderr]  --> src/part_3_control_flow/combination_lock.rs:3:6
[INFO] [stderr]   |
[INFO] [stderr] 3 | enum State {
[INFO] [stderr]   |      ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `run`
[INFO] [stderr]  --> src/part_3_control_flow/combination_lock.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub fn run() {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Red`
[INFO] [stderr]  --> src/part_4_data_structures/enums.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 |     Red,
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Blue`
[INFO] [stderr]  --> src/part_4_data_structures/enums.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     Blue,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/part_4_data_structures/enums.rs:98:9
[INFO] [stderr]    |
[INFO] [stderr] 98 |         _ => String::from("SOME COLOR")
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `State`
[INFO] [stderr]  --> src/part_3_control_flow/combination_lock.rs:3:6
[INFO] [stderr]   |
[INFO] [stderr] 3 | enum State {
[INFO] [stderr]   |      ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `run`
[INFO] [stderr]  --> src/part_3_control_flow/combination_lock.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub fn run() {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Red`
[INFO] [stderr]  --> src/part_4_data_structures/enums.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 |     Red,
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Blue`
[INFO] [stderr]  --> src/part_4_data_structures/enums.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     Blue,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.40s
[INFO] running `"docker" "inspect" "b4789a583fc3fcf76bf6f4cd140aa19fa2b3ba433c9c877413c1c3a367474770"`
[INFO] running `"docker" "rm" "-f" "b4789a583fc3fcf76bf6f4cd140aa19fa2b3ba433c9c877413c1c3a367474770"`
[INFO] [stdout] b4789a583fc3fcf76bf6f4cd140aa19fa2b3ba433c9c877413c1c3a367474770