[INFO] cloning repository https://github.com/alvaro-cuesta/rust-rover
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alvaro-cuesta/rust-rover" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falvaro-cuesta%2Frust-rover"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falvaro-cuesta%2Frust-rover'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6c4464eb1f7aa43e121f81d1d92cc7962b719f59
[INFO] checking alvaro-cuesta/rust-rover against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falvaro-cuesta%2Frust-rover" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alvaro-cuesta/rust-rover on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/alvaro-cuesta/rust-rover
[INFO] finished tweaking git repo https://github.com/alvaro-cuesta/rust-rover
[INFO] tweaked toml for git repo https://github.com/alvaro-cuesta/rust-rover written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/alvaro-cuesta/rust-rover already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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] 9d00748f839de8720a4c22d1e43f1ebd28a6b99217c39eb415797e1d143bcc8e
[INFO] running `"docker" "start" "-a" "9d00748f839de8720a4c22d1e43f1ebd28a6b99217c39eb415797e1d143bcc8e"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling num-bigint v0.2.1
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]     Checking num-integer v0.1.39
[INFO] [stderr]     Checking num-complex v0.2.1
[INFO] [stderr]     Checking num-rational v0.2.1
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking rust-rover v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: the feature `try_from` has been stable since 1.34.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/lib.rs:43:12
[INFO] [stderr]    |
[INFO] [stderr] 43 | #![feature(try_from)]
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `try_from` has been stable since 1.34.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/lib.rs:43:12
[INFO] [stderr]    |
[INFO] [stderr] 43 | #![feature(try_from)]
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.43s
[INFO] running `"docker" "inspect" "9d00748f839de8720a4c22d1e43f1ebd28a6b99217c39eb415797e1d143bcc8e"`
[INFO] running `"docker" "rm" "-f" "9d00748f839de8720a4c22d1e43f1ebd28a6b99217c39eb415797e1d143bcc8e"`
[INFO] [stdout] 9d00748f839de8720a4c22d1e43f1ebd28a6b99217c39eb415797e1d143bcc8e