[INFO] cloning repository https://github.com/ErickYoo/my-rust-by-examples
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ErickYoo/my-rust-by-examples" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FErickYoo%2Fmy-rust-by-examples"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FErickYoo%2Fmy-rust-by-examples'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d790f67db139a1a78c510ed8b0d4c855597b1ed8
[INFO] checking ErickYoo/my-rust-by-examples against master#914adf04af1c1a984707f778da3d04590c03d144 for pr-72331
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FErickYoo%2Fmy-rust-by-examples" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ErickYoo/my-rust-by-examples 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/ErickYoo/my-rust-by-examples
[INFO] finished tweaking git repo https://github.com/ErickYoo/my-rust-by-examples
[INFO] tweaked toml for git repo https://github.com/ErickYoo/my-rust-by-examples written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/ErickYoo/my-rust-by-examples already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+914adf04af1c1a984707f778da3d04590c03d144" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 8dffee6ae1f03cc211205b144dd003377ff080949ce0c8cfac9c4f56c2fbcff0
[INFO] running `"docker" "start" "-a" "8dffee6ae1f03cc211205b144dd003377ff080949ce0c8cfac9c4f56c2fbcff0"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking rust_by_example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `noisy_unused_variable`
[INFO] [stderr]   --> src/chapter04/variable_bindings.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let noisy_unused_variable = 2u32;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_noisy_unused_variable`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `noisy_unused_variable`
[INFO] [stderr]   --> src/chapter04/variable_bindings.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let noisy_unused_variable = 2u32;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_noisy_unused_variable`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `mut_D` should have a snake case name
[INFO] [stderr]  --> src/chapter04/mut_d.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn mut_D() {
[INFO] [stderr]   |        ^^^^^ help: convert the identifier to snake case: `mut_d`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function `mut_D` should have a snake case name
[INFO] [stderr]  --> src/chapter04/mut_d.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn mut_D() {
[INFO] [stderr]   |        ^^^^^ help: convert the identifier to snake case: `mut_d`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.01s
[INFO] running `"docker" "inspect" "8dffee6ae1f03cc211205b144dd003377ff080949ce0c8cfac9c4f56c2fbcff0"`
[INFO] running `"docker" "rm" "-f" "8dffee6ae1f03cc211205b144dd003377ff080949ce0c8cfac9c4f56c2fbcff0"`
[INFO] [stdout] 8dffee6ae1f03cc211205b144dd003377ff080949ce0c8cfac9c4f56c2fbcff0