[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] testing ToyVo/rulos against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FToyVo%2Frulos" "/workspace/builds/worker-97/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-97/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ToyVo/rulos on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-97/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-97/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-97/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" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2b0d7abe19e5a3228395c1c347881a2c993467adadc58c1a3f0b4ecdddcf1dfe
[INFO] running `Command { std: "docker" "start" "-a" "2b0d7abe19e5a3228395c1c347881a2c993467adadc58c1a3f0b4ecdddcf1dfe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b0d7abe19e5a3228395c1c347881a2c993467adadc58c1a3f0b4ecdddcf1dfe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b0d7abe19e5a3228395c1c347881a2c993467adadc58c1a3f0b4ecdddcf1dfe", kill_on_drop: false }`
[INFO] [stdout] 2b0d7abe19e5a3228395c1c347881a2c993467adadc58c1a3f0b4ecdddcf1dfe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 223041d23ab401f9f089691bf43da7d4888684a859a07daf1e214fa65c0786de
[INFO] running `Command { std: "docker" "start" "-a" "223041d23ab401f9f089691bf43da7d4888684a859a07daf1e214fa65c0786de", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling x86_64 v0.14.2
[INFO] [stderr]    Compiling bit_field v0.9.0
[INFO] [stderr]    Compiling volatile v0.4.4
[INFO] [stderr]    Compiling bootloader v0.9.17
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling volatile v0.2.7
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling uart_16550 v0.2.14
[INFO] [stderr]    Compiling 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] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: language item required, but not found: `eh_personality`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rulos` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "223041d23ab401f9f089691bf43da7d4888684a859a07daf1e214fa65c0786de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "223041d23ab401f9f089691bf43da7d4888684a859a07daf1e214fa65c0786de", kill_on_drop: false }`
[INFO] [stdout] 223041d23ab401f9f089691bf43da7d4888684a859a07daf1e214fa65c0786de