[INFO] fetching crate nill 1.1.0...
[INFO] testing nill-1.1.0 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-2
[INFO] extracting crate nill 1.1.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate nill 1.1.0
[INFO] finished tweaking crates.io crate nill 1.1.0
[INFO] tweaked toml for crates.io crate nill 1.1.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate nill 1.1.0 on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate nill 1.1.0 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" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d79bc53615ae885de322e95fe96092e952270360e5c0179e69f51b7dc80449fb
[INFO] running `Command { std: "docker" "start" "-a" "d79bc53615ae885de322e95fe96092e952270360e5c0179e69f51b7dc80449fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d79bc53615ae885de322e95fe96092e952270360e5c0179e69f51b7dc80449fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d79bc53615ae885de322e95fe96092e952270360e5c0179e69f51b7dc80449fb", kill_on_drop: false }`
[INFO] [stdout] d79bc53615ae885de322e95fe96092e952270360e5c0179e69f51b7dc80449fb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1be0aa29d7c5e8f79905aa007b503a54705127d5d7c065b281330da8ab285b2e
[INFO] running `Command { std: "docker" "start" "-a" "1be0aa29d7c5e8f79905aa007b503a54705127d5d7c065b281330da8ab285b2e", kill_on_drop: false }`
[INFO] [stderr]    Compiling nill v1.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: cannot find attribute `const_trait` in this scope
[INFO] [stdout]  --> src/nill.rs:1:3
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[const_trait]
[INFO] [stdout]   |   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: const `impl` for trait `Nill` which is not `const`
[INFO] [stdout]  --> src/nill.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl<T> const Nill for Vec<T> {
[INFO] [stdout]   |               ^^^^ this trait is not `const`
[INFO] [stdout]   |
[INFO] [stdout]   = note: marking a trait with `const` ensures all default method bodies are `const`
[INFO] [stdout]   = note: adding a non-const method body in the future would be a breaking change
[INFO] [stdout] help: mark `Nill` as `const` to allow it to have `const` implementations
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub const trait Nill {
[INFO] [stdout]   |     +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nill` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "1be0aa29d7c5e8f79905aa007b503a54705127d5d7c065b281330da8ab285b2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1be0aa29d7c5e8f79905aa007b503a54705127d5d7c065b281330da8ab285b2e", kill_on_drop: false }`
[INFO] [stdout] 1be0aa29d7c5e8f79905aa007b503a54705127d5d7c065b281330da8ab285b2e