[INFO] cloning repository https://github.com/MubasherFiaz/learn_git2
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MubasherFiaz/learn_git2" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMubasherFiaz%2Flearn_git2", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMubasherFiaz%2Flearn_git2'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 560061b66032f0ac27a829790e583828b5505d95
[INFO] testing MubasherFiaz/learn_git2 against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMubasherFiaz%2Flearn_git2" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MubasherFiaz/learn_git2 on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MubasherFiaz/learn_git2
[INFO] finished tweaking git repo https://github.com/MubasherFiaz/learn_git2
[INFO] tweaked toml for git repo https://github.com/MubasherFiaz/learn_git2 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/MubasherFiaz/learn_git2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 09f564b687703a64cb322ddb7886c63f833f82a021a0e08352e276122a65499e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "09f564b687703a64cb322ddb7886c63f833f82a021a0e08352e276122a65499e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "09f564b687703a64cb322ddb7886c63f833f82a021a0e08352e276122a65499e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09f564b687703a64cb322ddb7886c63f833f82a021a0e08352e276122a65499e", kill_on_drop: false }`
[INFO] [stdout] 09f564b687703a64cb322ddb7886c63f833f82a021a0e08352e276122a65499e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1eb8c0921b04734e4aa77e313788596e64ba541c7762eedbe1012654c6cfaa1e
[INFO] running `Command { std: "docker" "start" "-a" "1eb8c0921b04734e4aa77e313788596e64ba541c7762eedbe1012654c6cfaa1e", kill_on_drop: false }`
[INFO] [stderr]    Compiling pre v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/main.rs:104:8
[INFO] [stdout]     |
[INFO] [stdout] 104 | return &s[0..i];
[INFO] [stdout]     |        ^^^^^^^^ expected `()`, found `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pre` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "1eb8c0921b04734e4aa77e313788596e64ba541c7762eedbe1012654c6cfaa1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1eb8c0921b04734e4aa77e313788596e64ba541c7762eedbe1012654c6cfaa1e", kill_on_drop: false }`
[INFO] [stdout] 1eb8c0921b04734e4aa77e313788596e64ba541c7762eedbe1012654c6cfaa1e