[INFO] cloning repository https://github.com/ToyVo/rulos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ToyVo/rulos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FToyVo%2Frulos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FToyVo%2Frulos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6511e0a22d28d5f4e7951b343fa2c3f9ef618759
[INFO] checking ToyVo/rulos against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FToyVo%2Frulos" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ToyVo/rulos on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-6/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/ToyVo/rulos
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/ToyVo/rulos
[INFO] tweaked toml for git repo https://github.com/ToyVo/rulos written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/ToyVo/rulos already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a51ad8972fd3937d9c0f13e14f0e62b09f566a5274fd83397972978612b02e27
[INFO] running `Command { std: "docker" "start" "-a" "a51ad8972fd3937d9c0f13e14f0e62b09f566a5274fd83397972978612b02e27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a51ad8972fd3937d9c0f13e14f0e62b09f566a5274fd83397972978612b02e27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a51ad8972fd3937d9c0f13e14f0e62b09f566a5274fd83397972978612b02e27", kill_on_drop: false }`
[INFO] [stdout] a51ad8972fd3937d9c0f13e14f0e62b09f566a5274fd83397972978612b02e27
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4daebd94f2d9bc12e1287ab6e92611320c2c6a9430dbe39ce6adfb09406e8f03
[INFO] running `Command { std: "docker" "start" "-a" "4daebd94f2d9bc12e1287ab6e92611320c2c6a9430dbe39ce6adfb09406e8f03", kill_on_drop: false }`
[INFO] [stderr]    Compiling x86_64 v0.14.2
[INFO] [stderr]     Checking bit_field v0.9.0
[INFO] [stderr]     Checking volatile v0.4.4
[INFO] [stderr]    Compiling bootloader v0.9.17
[INFO] [stderr]     Checking volatile v0.2.7
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking uart_16550 v0.2.14
[INFO] [stderr]     Checking rulos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Write` is imported redundantly
[INFO] [stdout]   --> src/serial.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 1  | use core::fmt::{Arguments, Write};
[INFO] [stdout]    |                            ----- the item `Write` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 16 |     use Write;
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Write` is imported redundantly
[INFO] [stdout]    --> src/vga_buffer.rs:169:9
[INFO] [stdout]     |
[INFO] [stdout] 1   | use core::fmt::{Arguments, Result, Write};
[INFO] [stdout]     |                                    ----- the item `Write` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 169 |     use Write;
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: language item required, but not found: `eh_personality`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Write` is imported redundantly
[INFO] [stdout]   --> src/serial.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 1  | use core::fmt::{Arguments, Write};
[INFO] [stdout]    |                            ----- the item `Write` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 16 |     use Write;
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Write` is imported redundantly
[INFO] [stdout]    --> src/vga_buffer.rs:169:9
[INFO] [stdout]     |
[INFO] [stdout] 1   | use core::fmt::{Arguments, Result, Write};
[INFO] [stdout]     |                                    ----- the item `Write` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 169 |     use Write;
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rulos`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "4daebd94f2d9bc12e1287ab6e92611320c2c6a9430dbe39ce6adfb09406e8f03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4daebd94f2d9bc12e1287ab6e92611320c2c6a9430dbe39ce6adfb09406e8f03", kill_on_drop: false }`
[INFO] [stdout] 4daebd94f2d9bc12e1287ab6e92611320c2c6a9430dbe39ce6adfb09406e8f03