[INFO] updating cached repository https://github.com/alisha17/RustyFileOperations
[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] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c9eb0293c31961cc0daa465bc8a827dc57332da4
[INFO] checking alisha17/RustyFileOperations against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falisha17%2FRustyFileOperations" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alisha17/RustyFileOperations 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/alisha17/RustyFileOperations
[INFO] finished tweaking git repo https://github.com/alisha17/RustyFileOperations
[INFO] tweaked toml for git repo https://github.com/alisha17/RustyFileOperations written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/alisha17/RustyFileOperations 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-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b7a7d6fa790d248cca7d8ebd68585f741d2a81b7a79b909a21c2503ec01e48ef
[INFO] running `"docker" "start" "-a" "b7a7d6fa790d248cca7d8ebd68585f741d2a81b7a79b909a21c2503ec01e48ef"`
[INFO] [stderr]     Checking fileoperations v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:14:60
[INFO] [stderr]    |
[INFO] [stderr] 14 |         Err(why) => panic!("couldn't open due to: {}", why.description()),
[INFO] [stderr]    |                                                            ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:14:60
[INFO] [stderr]    |
[INFO] [stderr] 14 |         Err(why) => panic!("couldn't open due to: {}", why.description()),
[INFO] [stderr]    |                                                            ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:21:60
[INFO] [stderr]    |
[INFO] [stderr] 21 |         Err(why) => panic!("couldn't read due to: {}", why.description()),
[INFO] [stderr]    |                                                            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:29:62
[INFO] [stderr]    |
[INFO] [stderr] 29 |         Err(why) => panic!("couldn't create due to: {}", why.description()),
[INFO] [stderr]    |                                                              ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:35:53
[INFO] [stderr]    |
[INFO] [stderr] 35 |             panic!("couldn't write due to: {}", why.description())
[INFO] [stderr]    |                                                     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:21:60
[INFO] [stderr]    |
[INFO] [stderr] 21 |         Err(why) => panic!("couldn't read due to: {}", why.description()),
[INFO] [stderr]    |                                                            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:29:62
[INFO] [stderr]    |
[INFO] [stderr] 29 |         Err(why) => panic!("couldn't create due to: {}", why.description()),
[INFO] [stderr]    |                                                              ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:35:53
[INFO] [stderr]    |
[INFO] [stderr] 35 |             panic!("couldn't write due to: {}", why.description())
[INFO] [stderr]    |                                                     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `"docker" "inspect" "b7a7d6fa790d248cca7d8ebd68585f741d2a81b7a79b909a21c2503ec01e48ef"`
[INFO] running `"docker" "rm" "-f" "b7a7d6fa790d248cca7d8ebd68585f741d2a81b7a79b909a21c2503ec01e48ef"`
[INFO] [stdout] b7a7d6fa790d248cca7d8ebd68585f741d2a81b7a79b909a21c2503ec01e48ef