[INFO] fetching crate slice_math 0.1.31...
[INFO] testing slice_math-0.1.31 against master#ec6f9a5b4413f74386267ef8efc93712c2ce6db6 for pr-155739-1
[INFO] extracting crate slice_math 0.1.31 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate slice_math 0.1.31
[INFO] finished tweaking crates.io crate slice_math 0.1.31
[INFO] tweaked toml for crates.io crate slice_math 0.1.31 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate slice_math 0.1.31 on toolchain ec6f9a5b4413f74386267ef8efc93712c2ce6db6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate slice_math 0.1.31 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" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded transpose v0.2.3
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a6f229cf26d49bc74b2a8b1b976b1e32b0075e8de51c89834b4f7c2f8471d258
[INFO] running `Command { std: "docker" "start" "-a" "a6f229cf26d49bc74b2a8b1b976b1e32b0075e8de51c89834b4f7c2f8471d258", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a6f229cf26d49bc74b2a8b1b976b1e32b0075e8de51c89834b4f7c2f8471d258", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6f229cf26d49bc74b2a8b1b976b1e32b0075e8de51c89834b4f7c2f8471d258", kill_on_drop: false }`
[INFO] [stdout] a6f229cf26d49bc74b2a8b1b976b1e32b0075e8de51c89834b4f7c2f8471d258
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6655b8a289843a655067bc73e8d7cbf51d3d1193822fb69b9f5fb8513a217760
[INFO] running `Command { std: "docker" "start" "-a" "6655b8a289843a655067bc73e8d7cbf51d3d1193822fb69b9f5fb8513a217760", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling slice_trait v0.1.1
[INFO] [stderr]    Compiling moddef v0.2.2
[INFO] [stdout] error: cannot find attribute `const_trait` in this scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/slice_trait-0.1.1/src/lib.rs:24:3
[INFO] [stdout]    |
[INFO] [stdout] 24 | #[const_trait]
[INFO] [stdout]    |   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: relaxed bounds are not permitted in trait alias bounds
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/slice_trait-0.1.1/src/lib.rs:8:28
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait SlicePrereq<T> = ?Sized
[INFO] [stdout]   |                            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: trait aliases are not implicitly bounded by `Sized`, so there is nothing to relax
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: const `impl` for trait `Slice` which is not `const`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/slice_trait-0.1.1/src/lib.rs:36:15
[INFO] [stdout]    |
[INFO] [stdout] 36 | impl<T> const Slice for [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 `Slice` as `const` to allow it to have `const` implementations
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub const trait Slice: private::Slice + SlicePrereq<<Self as Slice>::Item>
[INFO] [stdout]    |     +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `slice_trait` (lib) due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "6655b8a289843a655067bc73e8d7cbf51d3d1193822fb69b9f5fb8513a217760", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6655b8a289843a655067bc73e8d7cbf51d3d1193822fb69b9f5fb8513a217760", kill_on_drop: false }`
[INFO] [stdout] 6655b8a289843a655067bc73e8d7cbf51d3d1193822fb69b9f5fb8513a217760
