[INFO] cloning repository https://github.com/devashishkatoriya/rust_basics
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/devashishkatoriya/rust_basics" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdevashishkatoriya%2Frust_basics", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdevashishkatoriya%2Frust_basics'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8d511ad5e465e07fdc6bec9d942f79acecad04f3
[INFO] testing devashishkatoriya/rust_basics against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdevashishkatoriya%2Frust_basics" "/workspace/builds/worker-21/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-21/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/devashishkatoriya/rust_basics on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-21/source/Cargo.toml
[INFO] crate git repo https://github.com/devashishkatoriya/rust_basics already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4fc86bc4ab7e658025f46224c0aa5872ca1e239dcaf52e12f186f5c4785e0483
[INFO] running `Command { std: "docker" "start" "-a" "4fc86bc4ab7e658025f46224c0aa5872ca1e239dcaf52e12f186f5c4785e0483", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4fc86bc4ab7e658025f46224c0aa5872ca1e239dcaf52e12f186f5c4785e0483", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fc86bc4ab7e658025f46224c0aa5872ca1e239dcaf52e12f186f5c4785e0483", kill_on_drop: false }`
[INFO] [stdout] 4fc86bc4ab7e658025f46224c0aa5872ca1e239dcaf52e12f186f5c4785e0483
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6d36c8606c923465389eec9157fd12bff309de1b0dda31844fe0b72ed776a8fe
[INFO] running `Command { std: "docker" "start" "-a" "6d36c8606c923465389eec9157fd12bff309de1b0dda31844fe0b72ed776a8fe", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling import_files v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/files.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let mut data = read_file(path);
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0381]: borrow of possibly-uninitialized variable: `temp`
[INFO] [stdout]   --> src/files.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |         temp.push_str(&line?);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^ use of possibly-uninitialized `temp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0382]: use of moved value: `line`
[INFO] [stdout]    --> src/files.rs:36:24
[INFO] [stdout]     |
[INFO] [stdout] 34  |     for line in buffered.lines() {
[INFO] [stdout]     |         ---- move occurs because `line` has type `Result<String, std::io::Error>`, which does not implement the `Copy` trait
[INFO] [stdout] 35  |         println!("{}", line?);
[INFO] [stdout]     |                        ----- `line` moved due to this method call
[INFO] [stdout] 36  |         temp.push_str(&line?);
[INFO] [stdout]     |                        ^^^^ value used here after move
[INFO] [stdout]     |
[INFO] [stdout] note: this function takes ownership of the receiver `self`, which moves `line`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0381, E0382.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `import_files` due to 3 previous errors; 1 warning emitted
[INFO] [stdout] For more information about an error, try `rustc --explain E0381`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6d36c8606c923465389eec9157fd12bff309de1b0dda31844fe0b72ed776a8fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d36c8606c923465389eec9157fd12bff309de1b0dda31844fe0b72ed776a8fe", kill_on_drop: false }`
[INFO] [stdout] 6d36c8606c923465389eec9157fd12bff309de1b0dda31844fe0b72ed776a8fe