[INFO] cloning repository https://github.com/ethowitz/life
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ethowitz/life" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fethowitz%2Flife", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fethowitz%2Flife'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ed6ce81d54be37f00fcdb639475c3cdcd1c1c598
[INFO] testing ethowitz/life against try#ecabaf78506b7a4668d42dc20268c086b93f0fad for pr-87041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fethowitz%2Flife" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ethowitz/life on toolchain ecabaf78506b7a4668d42dc20268c086b93f0fad
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ethowitz/life
[INFO] finished tweaking git repo https://github.com/ethowitz/life
[INFO] tweaked toml for git repo https://github.com/ethowitz/life written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/ethowitz/life already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c77b8654127996d39e7513277dce56aa0b447e2d180ccd1d511d4c7de2fe606e
[INFO] running `Command { std: "docker" "start" "-a" "c77b8654127996d39e7513277dce56aa0b447e2d180ccd1d511d4c7de2fe606e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c77b8654127996d39e7513277dce56aa0b447e2d180ccd1d511d4c7de2fe606e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c77b8654127996d39e7513277dce56aa0b447e2d180ccd1d511d4c7de2fe606e", kill_on_drop: false }`
[INFO] [stdout] c77b8654127996d39e7513277dce56aa0b447e2d180ccd1d511d4c7de2fe606e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d7830ff8e8c76b9e5fda39b5454035b336e38709eff39128c3e97f07f79782ba
[INFO] running `Command { std: "docker" "start" "-a" "d7830ff8e8c76b9e5fda39b5454035b336e38709eff39128c3e97f07f79782ba", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.21
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]    Compiling life v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/main.rs:55:21
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let gen_char = |x| if rand::random::<i64>() % 4 == 1 {ALIVE} else {' '};
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0506]: cannot assign to `*row` because it is borrowed
[INFO] [stdout]   --> src/main.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |         *row = row.into_iter().map(&gen_char).collect();
[INFO] [stdout]    |         ^^^^   ---                 --------- borrow later used here
[INFO] [stdout]    |         |      |
[INFO] [stdout]    |         |      borrow of `*row` occurs here
[INFO] [stdout]    |         assignment to borrowed `*row` occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0506`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `life`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "d7830ff8e8c76b9e5fda39b5454035b336e38709eff39128c3e97f07f79782ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7830ff8e8c76b9e5fda39b5454035b336e38709eff39128c3e97f07f79782ba", kill_on_drop: false }`
[INFO] [stdout] d7830ff8e8c76b9e5fda39b5454035b336e38709eff39128c3e97f07f79782ba