[INFO] fetching crate rrt0 0.3.1...
[INFO] checking rrt0-0.3.1 against master#ff1737bb00913444173658b4e0b274fd79aabf66 for pr-132712-1
[INFO] extracting crate rrt0 0.3.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate rrt0 0.3.1 on toolchain ff1737bb00913444173658b4e0b274fd79aabf66
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6-tc1/source/rust-toolchain
[INFO] started tweaking crates.io crate rrt0 0.3.1
[INFO] finished tweaking crates.io crate rrt0 0.3.1
[INFO] tweaked toml for crates.io crate rrt0 0.3.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest compatible version
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c7e0e13749d22a452d9bcb30b90d8666e2874f27ef9d160b35d57b53549e2022
[INFO] running `Command { std: "docker" "start" "-a" "c7e0e13749d22a452d9bcb30b90d8666e2874f27ef9d160b35d57b53549e2022", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c7e0e13749d22a452d9bcb30b90d8666e2874f27ef9d160b35d57b53549e2022", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7e0e13749d22a452d9bcb30b90d8666e2874f27ef9d160b35d57b53549e2022", kill_on_drop: false }`
[INFO] [stdout] c7e0e13749d22a452d9bcb30b90d8666e2874f27ef9d160b35d57b53549e2022
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d95403fe07381bbf5cc50522bb08d0c7d040a242ea0649770181c449f2465317
[INFO] running `Command { std: "docker" "start" "-a" "d95403fe07381bbf5cc50522bb08d0c7d040a242ea0649770181c449f2465317", kill_on_drop: false }`
[INFO] [stderr]     Checking rrt0 v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: lang item `start` function has wrong type
[INFO] [stdout]   --> src/lib.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | / extern "C" fn start<T>(user_main: *const (), _argc: isize, _argv: *const *const u8) -> !
[INFO] [stdout] 18 | | where
[INFO] [stdout] 19 | |     T: Termination,
[INFO] [stdout]    | |___________________^ expected "Rust" fn, found "C" fn
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected signature `fn(fn() -> T, isize, *const *const u8, u8) -> isize`
[INFO] [stdout]               found signature `extern "C" fn(*const (), isize, *const *const u8) -> !`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rrt0` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "d95403fe07381bbf5cc50522bb08d0c7d040a242ea0649770181c449f2465317", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d95403fe07381bbf5cc50522bb08d0c7d040a242ea0649770181c449f2465317", kill_on_drop: false }`
[INFO] [stdout] d95403fe07381bbf5cc50522bb08d0c7d040a242ea0649770181c449f2465317