[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] testing kewalkhondekar25/Rust against try#33835004928d3bf65db4d4712e1330766263b0bd for pr-155739-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkewalkhondekar25%2FRust" "/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/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-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kewalkhondekar25/Rust on toolchain 33835004928d3bf65db4d4712e1330766263b0bd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "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" "+33835004928d3bf65db4d4712e1330766263b0bd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 97ca20d61f99e600e024d999ab2a4243db208ab1e7ee294a903dc422ea4ec8b7
[INFO] running `Command { std: "docker" "start" "-a" "97ca20d61f99e600e024d999ab2a4243db208ab1e7ee294a903dc422ea4ec8b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "97ca20d61f99e600e024d999ab2a4243db208ab1e7ee294a903dc422ea4ec8b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97ca20d61f99e600e024d999ab2a4243db208ab1e7ee294a903dc422ea4ec8b7", kill_on_drop: false }`
[INFO] [stdout] 97ca20d61f99e600e024d999ab2a4243db208ab1e7ee294a903dc422ea4ec8b7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+33835004928d3bf65db4d4712e1330766263b0bd" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9ea6e797c238b980ca6f308f9c38cb91e73a733caf1aeab189a5d3496d575281
[INFO] running `Command { std: "docker" "start" "-a" "9ea6e797c238b980ca6f308f9c38cb91e73a733caf1aeab189a5d3496d575281", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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: 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 0.30s
[INFO] running `Command { std: "docker" "inspect" "9ea6e797c238b980ca6f308f9c38cb91e73a733caf1aeab189a5d3496d575281", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ea6e797c238b980ca6f308f9c38cb91e73a733caf1aeab189a5d3496d575281", kill_on_drop: false }`
[INFO] [stdout] 9ea6e797c238b980ca6f308f9c38cb91e73a733caf1aeab189a5d3496d575281
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+33835004928d3bf65db4d4712e1330766263b0bd" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0ed83fcffdcb7f6d9c6c7af6281124b45445f8545d9d11c8d91eab2418ada982
[INFO] running `Command { std: "docker" "start" "-a" "0ed83fcffdcb7f6d9c6c7af6281124b45445f8545d9d11c8d91eab2418ada982", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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: 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 `test` profile [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "0ed83fcffdcb7f6d9c6c7af6281124b45445f8545d9d11c8d91eab2418ada982", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ed83fcffdcb7f6d9c6c7af6281124b45445f8545d9d11c8d91eab2418ada982", kill_on_drop: false }`
[INFO] [stdout] 0ed83fcffdcb7f6d9c6c7af6281124b45445f8545d9d11c8d91eab2418ada982
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+33835004928d3bf65db4d4712e1330766263b0bd" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 08c229b13bb6e4c2bbcc7e2bf749834a4159ed73c15c51aea2918df93517eb04
[INFO] running `Command { std: "docker" "start" "-a" "08c229b13bb6e4c2bbcc7e2bf749834a4159ed73c15c51aea2918df93517eb04", kill_on_drop: false }`
[INFO] [stderr] warning: value assigned to `x` is never read
[INFO] [stderr]  --> src/_04_mutability/mod.rs:7:22
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mut x: u32 = 69;
[INFO] [stderr]   |                      ^^ this value is reassigned later and never used
[INFO] [stderr] 8 |     x = 70;
[INFO] [stderr]   |     ------ `x` is overwritten here before the previous value is read
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/_07_borrowing/mod.rs:27:8
[INFO] [stderr]    |
[INFO] [stderr] 27 |    let mut x = String::from("Hello");
[INFO] [stderr]    |        ----^
[INFO] [stderr]    |        |
[INFO] [stderr]    |        help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `learning-rust` (bin "learning-rust" test) generated 2 warnings (run `cargo fix --bin "learning-rust" -p learning-rust --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/learning_rust-3996dd291873879d)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "08c229b13bb6e4c2bbcc7e2bf749834a4159ed73c15c51aea2918df93517eb04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08c229b13bb6e4c2bbcc7e2bf749834a4159ed73c15c51aea2918df93517eb04", kill_on_drop: false }`
[INFO] [stdout] 08c229b13bb6e4c2bbcc7e2bf749834a4159ed73c15c51aea2918df93517eb04