[INFO] cloning repository https://github.com/limitLiu/learn-rust-by-rust-book
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/limitLiu/learn-rust-by-rust-book" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FlimitLiu%2Flearn-rust-by-rust-book"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FlimitLiu%2Flearn-rust-by-rust-book'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2b14b2b71e55287d94a0c259e089c3e31229bab3
[INFO] checking limitLiu/learn-rust-by-rust-book against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FlimitLiu%2Flearn-rust-by-rust-book" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/limitLiu/learn-rust-by-rust-book on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/limitLiu/learn-rust-by-rust-book
[INFO] finished tweaking git repo https://github.com/limitLiu/learn-rust-by-rust-book
[INFO] tweaked toml for git repo https://github.com/limitLiu/learn-rust-by-rust-book written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/limitLiu/learn-rust-by-rust-book already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] d91f942a2a449633aba5770cb3da487229b5b31023292a06f95bd8a30205cf28
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "d91f942a2a449633aba5770cb3da487229b5b31023292a06f95bd8a30205cf28"`
[INFO] [stderr]     Checking learn-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: the feature `uniform_paths` has been stable since 1.32.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:24
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(box_syntax, uniform_paths)]
[INFO] [stderr]   |                        ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `uniform_paths` has been stable since 1.32.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:24
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(box_syntax, uniform_paths)]
[INFO] [stderr]   |                        ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `"docker" "inspect" "d91f942a2a449633aba5770cb3da487229b5b31023292a06f95bd8a30205cf28"`
[INFO] running `"docker" "rm" "-f" "d91f942a2a449633aba5770cb3da487229b5b31023292a06f95bd8a30205cf28"`
[INFO] [stdout] d91f942a2a449633aba5770cb3da487229b5b31023292a06f95bd8a30205cf28