[INFO] cloning repository https://github.com/maddarauci/blog_os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/maddarauci/blog_os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaddarauci%2Fblog_os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaddarauci%2Fblog_os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 61d3ff077e12521303eb312fc716ba2e6f25350c
[INFO] checking maddarauci/blog_os against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaddarauci%2Fblog_os" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/maddarauci/blog_os
[INFO] finished tweaking git repo https://github.com/maddarauci/blog_os
[INFO] tweaked toml for git repo https://github.com/maddarauci/blog_os written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/maddarauci/blog_os on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/maddarauci/blog_os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking maddarauci/blog_os against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaddarauci%2Fblog_os" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/maddarauci/blog_os
[INFO] finished tweaking git repo https://github.com/maddarauci/blog_os
[INFO] tweaked toml for git repo https://github.com/maddarauci/blog_os written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/maddarauci/blog_os on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/maddarauci/blog_os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c9f54805a0d6a27a8f5cd395244a5ed9a98da421fcf49b1d22ac26dd060b646c
[INFO] running `Command { std: "docker" "start" "-a" "c9f54805a0d6a27a8f5cd395244a5ed9a98da421fcf49b1d22ac26dd060b646c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c9f54805a0d6a27a8f5cd395244a5ed9a98da421fcf49b1d22ac26dd060b646c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9f54805a0d6a27a8f5cd395244a5ed9a98da421fcf49b1d22ac26dd060b646c", kill_on_drop: false }`
[INFO] [stdout] c9f54805a0d6a27a8f5cd395244a5ed9a98da421fcf49b1d22ac26dd060b646c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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 -Dunmustuse_in_always_ok" "-e" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 81a50e6c7d540fbe540862fe8ba9b761c98d6f5236a1c02688dc3561fd05b25e
[INFO] running `Command { std: "docker" "start" "-a" "81a50e6c7d540fbe540862fe8ba9b761c98d6f5236a1c02688dc3561fd05b25e", kill_on_drop: false }`
[INFO] [stderr]     Checking blog_os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected one of `...`, `..=`, `..`, `:`, or `|`, found `->`
[INFO] [stdout]   --> src/main.rs:10:28
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub extern "C" fn _start(0 -> ! {
[INFO] [stdout]    |                            ^^ expected one of `...`, `..=`, `..`, `:`, or `|`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected one of `...`, `..=`, `..`, `:`, or `|`, found `->`
[INFO] [stdout]   --> src/main.rs:10:28
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub extern "C" fn _start(0 -> ! {
[INFO] [stdout]    |                            ^^ expected one of `...`, `..=`, `..`, `:`, or `|`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected one of `->`, `where`, or `{`, found `#`
[INFO] [stdout]   --> src/main.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | })
[INFO] [stdout]    |   - expected one of `->`, `where`, or `{`
[INFO] [stdout] ...
[INFO] [stdout] 17 | #[panic_handler]
[INFO] [stdout]    | ^ unexpected token
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected one of `->`, `where`, or `{`, found `#`
[INFO] [stdout]   --> src/main.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | })
[INFO] [stdout]    |   - expected one of `->`, `where`, or `{`
[INFO] [stdout] ...
[INFO] [stdout] 17 | #[panic_handler]
[INFO] [stdout]    | ^ unexpected token
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `blog_os` (bin "blog_os" test) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `blog_os` (bin "blog_os") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "81a50e6c7d540fbe540862fe8ba9b761c98d6f5236a1c02688dc3561fd05b25e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81a50e6c7d540fbe540862fe8ba9b761c98d6f5236a1c02688dc3561fd05b25e", kill_on_drop: false }`
[INFO] [stdout] 81a50e6c7d540fbe540862fe8ba9b761c98d6f5236a1c02688dc3561fd05b25e