[INFO] cloning repository https://github.com/prjwl16/rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/prjwl16/rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fprjwl16%2Frust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fprjwl16%2Frust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 296da2c17ff43351b98758edd594619246b511c6
[INFO] checking prjwl16/rust against 3154cc1a3e6424e44f438a95007d043ed5ceaaf6 for pr-133502-30
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fprjwl16%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/prjwl16/rust
[INFO] finished tweaking git repo https://github.com/prjwl16/rust
[INFO] tweaked toml for git repo https://github.com/prjwl16/rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/prjwl16/rust on toolchain 3154cc1a3e6424e44f438a95007d043ed5ceaaf6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3154cc1a3e6424e44f438a95007d043ed5ceaaf6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/prjwl16/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" "+3154cc1a3e6424e44f438a95007d043ed5ceaaf6" "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/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@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 2c84725768bbb482b0627a2f05728b8559d11876836392a10248634170cefc4b
[INFO] running `Command { std: "docker" "start" "2c84725768bbb482b0627a2f05728b8559d11876836392a10248634170cefc4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2c84725768bbb482b0627a2f05728b8559d11876836392a10248634170cefc4b", 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" "2c84725768bbb482b0627a2f05728b8559d11876836392a10248634170cefc4b" "/opt/rustwide/cargo-home/bin/cargo" "+3154cc1a3e6424e44f438a95007d043ed5ceaaf6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2c84725768bbb482b0627a2f05728b8559d11876836392a10248634170cefc4b", 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" "2c84725768bbb482b0627a2f05728b8559d11876836392a10248634170cefc4b" "/opt/rustwide/cargo-home/bin/cargo" "+3154cc1a3e6424e44f438a95007d043ed5ceaaf6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking hello-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `hello-rust` (bin "hello-rust" test) due to 1 previous error; 1 warning emitted
[INFO] [stdout] error[E0384]: cannot assign twice to immutable variable `age`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let age=25;
[INFO] [stdout]   |         --- first assignment to `age`
[INFO] [stdout] 4 |     age=26;
[INFO] [stdout]   |     ^^^^^^ cannot assign twice to immutable variable
[INFO] [stdout]   |
[INFO] [stdout] help: consider making this binding mutable
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let mut age=25;
[INFO] [stdout]   |         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: value assigned to `age` is never read
[INFO] [stdout]  --> src/main.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let age=25;
[INFO] [stdout]   |             ^^ this value is reassigned later and never used
[INFO] [stdout] 4 |     age=26;
[INFO] [stdout]   |     ------ `age` 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] For more information about this error, try `rustc --explain E0384`.
[INFO] [stdout] 
[INFO] [stdout] error[E0384]: cannot assign twice to immutable variable `age`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let age=25;
[INFO] [stdout]   |         --- first assignment to `age`
[INFO] [stdout] 4 |     age=26;
[INFO] [stdout]   |     ^^^^^^ cannot assign twice to immutable variable
[INFO] [stdout]   |
[INFO] [stdout] help: consider making this binding mutable
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let mut age=25;
[INFO] [stdout]   |         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `age` is never read
[INFO] [stdout]  --> src/main.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let age=25;
[INFO] [stdout]   |             ^^ this value is reassigned later and never used
[INFO] [stdout] 4 |     age=26;
[INFO] [stdout]   |     ------ `age` 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] For more information about this error, try `rustc --explain E0384`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hello-rust` (bin "hello-rust") due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "2c84725768bbb482b0627a2f05728b8559d11876836392a10248634170cefc4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c84725768bbb482b0627a2f05728b8559d11876836392a10248634170cefc4b", kill_on_drop: false }`
[INFO] [stdout] 2c84725768bbb482b0627a2f05728b8559d11876836392a10248634170cefc4b
