[INFO] cloning repository https://github.com/kewalkhondekar25/Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kewalkhondekar25/Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkewalkhondekar25%2FRust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkewalkhondekar25%2FRust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f2f01c9d8b7cb414f85413d0b9323f9a5c063575
[INFO] checking kewalkhondekar25/Rust against try#1bdcb63291ccffc030f8223f6f978568dd240e3e for 155501-infallible-never-with-reservation
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkewalkhondekar25%2FRust" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kewalkhondekar25/Rust
[INFO] finished tweaking git repo https://github.com/kewalkhondekar25/Rust
[INFO] tweaked toml for git repo https://github.com/kewalkhondekar25/Rust written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kewalkhondekar25/Rust on toolchain 1bdcb63291ccffc030f8223f6f978568dd240e3e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1bdcb63291ccffc030f8223f6f978568dd240e3e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kewalkhondekar25/Rust 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" "+1bdcb63291ccffc030f8223f6f978568dd240e3e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1bdcb63291ccffc030f8223f6f978568dd240e3e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d911a053d2d87609a19996abd4cc4b83a189ad5851ccc08492b9eea8101ddb1f
[INFO] running `Command { std: "docker" "start" "-a" "d911a053d2d87609a19996abd4cc4b83a189ad5851ccc08492b9eea8101ddb1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d911a053d2d87609a19996abd4cc4b83a189ad5851ccc08492b9eea8101ddb1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d911a053d2d87609a19996abd4cc4b83a189ad5851ccc08492b9eea8101ddb1f", kill_on_drop: false }`
[INFO] [stdout] d911a053d2d87609a19996abd4cc4b83a189ad5851ccc08492b9eea8101ddb1f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1bdcb63291ccffc030f8223f6f978568dd240e3e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 80673b5b7f392d883386545ec373348615d6b5d7e5536f2c9f1edc4a574fba14
[INFO] running `Command { std: "docker" "start" "-a" "80673b5b7f392d883386545ec373348615d6b5d7e5536f2c9f1edc4a574fba14", kill_on_drop: false }`
[INFO] [stderr]     Checking learning-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]  --> src/_04_mutability/mod.rs:7:22
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut x: u32 = 69;
[INFO] [stdout]   |                      ^^ this value is reassigned later and never used
[INFO] [stdout] 8 |     x = 70;
[INFO] [stdout]   |     ------ `x` is overwritten here before the previous value is read
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]  --> src/_04_mutability/mod.rs:7:22
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut x: u32 = 69;
[INFO] [stdout]   |                      ^^ this value is reassigned later and never used
[INFO] [stdout] 8 |     x = 70;
[INFO] [stdout]   |     ------ `x` is overwritten here before the previous value is read
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/_07_borrowing/mod.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |    let mut x = String::from("Hello");
[INFO] [stdout]    |        ----^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/_07_borrowing/mod.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |    let mut x = String::from("Hello");
[INFO] [stdout]    |        ----^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "80673b5b7f392d883386545ec373348615d6b5d7e5536f2c9f1edc4a574fba14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80673b5b7f392d883386545ec373348615d6b5d7e5536f2c9f1edc4a574fba14", kill_on_drop: false }`
[INFO] [stdout] 80673b5b7f392d883386545ec373348615d6b5d7e5536f2c9f1edc4a574fba14
