[INFO] updating cached repository https://github.com/devashishkatoriya/rust_basics
[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] 8d511ad5e465e07fdc6bec9d942f79acecad04f3
[INFO] testing devashishkatoriya/rust_basics against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdevashishkatoriya%2Frust_basics" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/devashishkatoriya/rust_basics on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/devashishkatoriya/rust_basics
[INFO] finished tweaking git repo https://github.com/devashishkatoriya/rust_basics
[INFO] tweaked toml for git repo https://github.com/devashishkatoriya/rust_basics written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/devashishkatoriya/rust_basics already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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=warn" "-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" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9573b4cdc0ffd982d881d07968f0f75604873f8d1ed2f232d3230fd4108a57e2
[INFO] running `"docker" "start" "-a" "9573b4cdc0ffd982d881d07968f0f75604873f8d1ed2f232d3230fd4108a57e2"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling import_files v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/files.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let mut data = read_file(path);
[INFO] [stderr]    |         ----^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0381]: borrow of possibly-uninitialized variable: `temp`
[INFO] [stderr]   --> src/files.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |         temp.push_str(&line?);
[INFO] [stderr]    |         ^^^^ use of possibly-uninitialized `temp`
[INFO] [stderr] 
[INFO] [stderr] error[E0382]: use of moved value: `line`
[INFO] [stderr]   --> src/files.rs:36:24
[INFO] [stderr]    |
[INFO] [stderr] 34 |     for line in buffered.lines() {
[INFO] [stderr]    |         ---- move occurs because `line` has type `std::result::Result<std::string::String, std::io::Error>`, which does not implement the `Copy` trait
[INFO] [stderr] 35 |         println!("{}", line?);
[INFO] [stderr]    |                        ---- value moved here
[INFO] [stderr] 36 |         temp.push_str(&line?);
[INFO] [stderr]    |                        ^^^^ value used here after move
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0381, E0382.
[INFO] [stderr] For more information about an error, try `rustc --explain E0381`.
[INFO] [stderr] error: could not compile `import_files`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "9573b4cdc0ffd982d881d07968f0f75604873f8d1ed2f232d3230fd4108a57e2"`
[INFO] running `"docker" "rm" "-f" "9573b4cdc0ffd982d881d07968f0f75604873f8d1ed2f232d3230fd4108a57e2"`
[INFO] [stdout] 9573b4cdc0ffd982d881d07968f0f75604873f8d1ed2f232d3230fd4108a57e2