[INFO] cloning repository https://github.com/MandavkarPranjal/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/MandavkarPranjal/rust_basics" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMandavkarPranjal%2Frust_basics", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMandavkarPranjal%2Frust_basics'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 940353ba22d42a8fb0fffee22493c9aa2387992e
[INFO] checking MandavkarPranjal/rust_basics against f4dd856795debe636f2ba39a900f162f5abeb7e8 for pr-160904
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMandavkarPranjal%2Frust_basics" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/MandavkarPranjal/rust_basics
[INFO] finished tweaking git repo https://github.com/MandavkarPranjal/rust_basics
[INFO] tweaked toml for git repo https://github.com/MandavkarPranjal/rust_basics written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/MandavkarPranjal/rust_basics on toolchain f4dd856795debe636f2ba39a900f162f5abeb7e8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f4dd856795debe636f2ba39a900f162f5abeb7e8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/MandavkarPranjal/rust_basics already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f4dd856795debe636f2ba39a900f162f5abeb7e8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 56a684aa98151b407c7424718c0ae8cc6bb79a54b618838dc111a4eaf251a56f
[INFO] running `Command { std: "docker" "start" "56a684aa98151b407c7424718c0ae8cc6bb79a54b618838dc111a4eaf251a56f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "56a684aa98151b407c7424718c0ae8cc6bb79a54b618838dc111a4eaf251a56f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "56a684aa98151b407c7424718c0ae8cc6bb79a54b618838dc111a4eaf251a56f" "/opt/rustwide/cargo-home/bin/cargo" "+f4dd856795debe636f2ba39a900f162f5abeb7e8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "56a684aa98151b407c7424718c0ae8cc6bb79a54b618838dc111a4eaf251a56f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "56a684aa98151b407c7424718c0ae8cc6bb79a54b618838dc111a4eaf251a56f" "/opt/rustwide/cargo-home/bin/cargo" "+f4dd856795debe636f2ba39a900f162f5abeb7e8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0425]: cannot find value `mutable` in this scope
[INFO] [stdout]   --> src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     mutable = true;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `_mutable` defined here
[INFO] [stdout]   --> src/main.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let mut _mutable = 12; // Mutable `i32`
[INFO] [stdout]    |             ^^^^^^^^
[INFO] [stdout] help: the leading underscore in `_mutable` marks it as unused, consider renaming it to `mutable`
[INFO] [stdout]    |
[INFO] [stdout] 22 -     let mut _mutable = 12; // Mutable `i32`
[INFO] [stdout] 22 +     let mut mutable = 12; // Mutable `i32`
[INFO] [stdout]    |
[INFO] [stdout] help: you might have meant to introduce a new binding
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let mutable = true;
[INFO] [stdout]    |     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hello_world` (bin "hello_world" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0425]: cannot find value `mutable` in this scope
[INFO] [stdout]   --> src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     mutable = true;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `_mutable` defined here
[INFO] [stdout]   --> src/main.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let mut _mutable = 12; // Mutable `i32`
[INFO] [stdout]    |             ^^^^^^^^
[INFO] [stdout] help: the leading underscore in `_mutable` marks it as unused, consider renaming it to `mutable`
[INFO] [stdout]    |
[INFO] [stdout] 22 -     let mut _mutable = 12; // Mutable `i32`
[INFO] [stdout] 22 +     let mut mutable = 12; // Mutable `i32`
[INFO] [stdout]    |
[INFO] [stdout] help: you might have meant to introduce a new binding
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let mutable = true;
[INFO] [stdout]    |     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hello_world` (bin "hello_world") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "56a684aa98151b407c7424718c0ae8cc6bb79a54b618838dc111a4eaf251a56f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56a684aa98151b407c7424718c0ae8cc6bb79a54b618838dc111a4eaf251a56f", kill_on_drop: false }`
[INFO] [stdout] 56a684aa98151b407c7424718c0ae8cc6bb79a54b618838dc111a4eaf251a56f
