[INFO] fetching crate slice_ops 1.0.7...
[INFO] testing slice_ops-1.0.7 against try#2440211fe03bc45c89b6dc1a3df18382ce91e32b for pr-146098-1
[INFO] extracting crate slice_ops 1.0.7 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate slice_ops 1.0.7
[INFO] finished tweaking crates.io crate slice_ops 1.0.7
[INFO] tweaked toml for crates.io crate slice_ops 1.0.7 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate slice_ops 1.0.7 on toolchain 2440211fe03bc45c89b6dc1a3df18382ce91e32b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate slice_ops 1.0.7 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" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9076b0c626e061c5b473b611c1a9f3b75640dd8ab83bebdaa3e9eb297bb743be
[INFO] running `Command { std: "docker" "start" "-a" "9076b0c626e061c5b473b611c1a9f3b75640dd8ab83bebdaa3e9eb297bb743be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9076b0c626e061c5b473b611c1a9f3b75640dd8ab83bebdaa3e9eb297bb743be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9076b0c626e061c5b473b611c1a9f3b75640dd8ab83bebdaa3e9eb297bb743be", kill_on_drop: false }`
[INFO] [stdout] 9076b0c626e061c5b473b611c1a9f3b75640dd8ab83bebdaa3e9eb297bb743be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "-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" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0afc4531c675fdb891beb2197227d1259cd87fc29da0dcf9b4748b3060683a47
[INFO] running `Command { std: "docker" "start" "-a" "0afc4531c675fdb891beb2197227d1259cd87fc29da0dcf9b4748b3060683a47", kill_on_drop: false }`
[INFO] [stderr]    Compiling moddef v0.2.6
[INFO] [stderr]    Compiling slice_trait v0.1.9
[INFO] [stdout] error[E0635]: unknown feature `const_deref`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/slice_trait-0.1.9/src/lib.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(const_deref)]
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `slice_trait` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "0afc4531c675fdb891beb2197227d1259cd87fc29da0dcf9b4748b3060683a47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0afc4531c675fdb891beb2197227d1259cd87fc29da0dcf9b4748b3060683a47", kill_on_drop: false }`
[INFO] [stdout] 0afc4531c675fdb891beb2197227d1259cd87fc29da0dcf9b4748b3060683a47