[INFO] cloning repository https://github.com/Saber-Kurama/hello-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Saber-Kurama/hello-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSaber-Kurama%2Fhello-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSaber-Kurama%2Fhello-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f82992fe6a65999cfc763a6f53c3fc34a0660191
[INFO] testing Saber-Kurama/hello-rust against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSaber-Kurama%2Fhello-rust" "/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/Saber-Kurama/hello-rust 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/Saber-Kurama/hello-rust
[INFO] finished tweaking git repo https://github.com/Saber-Kurama/hello-rust
[INFO] tweaked toml for git repo https://github.com/Saber-Kurama/hello-rust written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/Saber-Kurama/hello-rust 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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ferris-says v0.2.1
[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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 962b805b255256f431c32ed3a45db4087164fa36155250640e71d0bbe8fa2b9b
[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" "962b805b255256f431c32ed3a45db4087164fa36155250640e71d0bbe8fa2b9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "962b805b255256f431c32ed3a45db4087164fa36155250640e71d0bbe8fa2b9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "962b805b255256f431c32ed3a45db4087164fa36155250640e71d0bbe8fa2b9b", kill_on_drop: false }`
[INFO] [stdout] 962b805b255256f431c32ed3a45db4087164fa36155250640e71d0bbe8fa2b9b
[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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4553476dc0ac8207c52633f079abd08f1f4863a0c3e9933d7605f58d69ffb63f
[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" "4553476dc0ac8207c52633f079abd08f1f4863a0c3e9933d7605f58d69ffb63f", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling smallvec v0.4.5
[INFO] [stderr]    Compiling textwrap v0.13.4
[INFO] [stderr]    Compiling ferris-says v0.2.1
[INFO] [stderr]    Compiling hello-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `loopback`
[INFO] [stdout]    --> src/main.rs:104:9
[INFO] [stdout]     |
[INFO] [stdout] 104 |     let loopback = IpAddr::V6(String::from("::1"));
[INFO] [stdout]     |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_loopback`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `home1`
[INFO] [stdout]    --> src/main.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |     let home1 = IpAddrKind {
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_home1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `v` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/main.rs:129:1
[INFO] [stdout]     |
[INFO] [stdout] 127 | let first = &v[0];
[INFO] [stdout]     |              - immutable borrow occurs here
[INFO] [stdout] 128 | 
[INFO] [stdout] 129 | v.push(6);
[INFO] [stdout]     | ^^^^^^^^^ mutable borrow occurs here
[INFO] [stdout] 130 | 
[INFO] [stdout] 131 | println!("The first element is: {}", first);
[INFO] [stdout]     |                                      ----- immutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hello-rust` due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "4553476dc0ac8207c52633f079abd08f1f4863a0c3e9933d7605f58d69ffb63f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4553476dc0ac8207c52633f079abd08f1f4863a0c3e9933d7605f58d69ffb63f", kill_on_drop: false }`
[INFO] [stdout] 4553476dc0ac8207c52633f079abd08f1f4863a0c3e9933d7605f58d69ffb63f