[INFO] fetching crate switcher2 0.1.0...
[INFO] building switcher2-0.1.0 against master#ad85bc524b1ad696e42061ad8338d382dffbdbe5 for pr-146237-1
[INFO] extracting crate switcher2 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate switcher2 0.1.0
[INFO] finished tweaking crates.io crate switcher2 0.1.0
[INFO] tweaked toml for crates.io crate switcher2 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate switcher2 0.1.0 on toolchain ad85bc524b1ad696e42061ad8338d382dffbdbe5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate switcher2 0.1.0 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" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crossbeam-epoch v0.9.10
[INFO] [stderr]   Downloaded plotters v0.3.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0c53329668f8a1f8c0ef0ed7c7d04034e242e0559b5cc1e3dc010b1d2767cc74
[INFO] running `Command { std: "docker" "start" "-a" "0c53329668f8a1f8c0ef0ed7c7d04034e242e0559b5cc1e3dc010b1d2767cc74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c53329668f8a1f8c0ef0ed7c7d04034e242e0559b5cc1e3dc010b1d2767cc74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c53329668f8a1f8c0ef0ed7c7d04034e242e0559b5cc1e3dc010b1d2767cc74", kill_on_drop: false }`
[INFO] [stdout] 0c53329668f8a1f8c0ef0ed7c7d04034e242e0559b5cc1e3dc010b1d2767cc74
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=forbid" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b6032859f92a1f03990680735147f7640abf9f91f1a1d7585df00161c4bc1f97
[INFO] running `Command { std: "docker" "start" "-a" "b6032859f92a1f03990680735147f7640abf9f91f1a1d7585df00161c4bc1f97", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling switcher2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: unsafe attribute used without unsafe
[INFO] [stdout]   --> src/arch/unix_x64.rs:20:7
[INFO] [stdout]    |
[INFO] [stdout] 20 |     #[naked]
[INFO] [stdout]    |       ^^^^^ usage of unsafe attribute
[INFO] [stdout]    |
[INFO] [stdout] help: wrap the attribute in `unsafe(...)`
[INFO] [stdout]    |
[INFO] [stdout] 20 |     #[unsafe(naked)]
[INFO] [stdout]    |       +++++++     +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `naked_functions` has been stable since 1.88.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(naked_functions)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0787]: the `asm!` macro is not allowed in naked functions
[INFO] [stdout]   --> src/arch/unix_x64.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 | /         asm!(
[INFO] [stdout] 23 | |             // Stops unwinding/backtracing at this function.
[INFO] [stdout] 24 | |             ".cfi_undefined rip",
[INFO] [stdout] 25 | |             "call [rsp + 8]",
[INFO] [stdout] 26 | |             options(noreturn)
[INFO] [stdout] 27 | |         )
[INFO] [stdout]    | |_________^ consider using the `naked_asm!` macro instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0787`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `switcher2` (lib) due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "b6032859f92a1f03990680735147f7640abf9f91f1a1d7585df00161c4bc1f97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6032859f92a1f03990680735147f7640abf9f91f1a1d7585df00161c4bc1f97", kill_on_drop: false }`
[INFO] [stdout] b6032859f92a1f03990680735147f7640abf9f91f1a1d7585df00161c4bc1f97