[INFO] fetching crate mempeek 0.1.5...
[INFO] testing mempeek-0.1.5 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-1
[INFO] extracting crate mempeek 0.1.5 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate mempeek 0.1.5
[INFO] finished tweaking crates.io crate mempeek 0.1.5
[INFO] tweaked toml for crates.io crate mempeek 0.1.5 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mempeek 0.1.5 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mempeek 0.1.5 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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 55cedfdc8d75e971ff73ac18df85548ea392f0d6b184e7dbd2a11db2d5e3027e
[INFO] running `Command { std: "docker" "start" "-a" "55cedfdc8d75e971ff73ac18df85548ea392f0d6b184e7dbd2a11db2d5e3027e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "55cedfdc8d75e971ff73ac18df85548ea392f0d6b184e7dbd2a11db2d5e3027e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55cedfdc8d75e971ff73ac18df85548ea392f0d6b184e7dbd2a11db2d5e3027e", kill_on_drop: false }`
[INFO] [stdout] 55cedfdc8d75e971ff73ac18df85548ea392f0d6b184e7dbd2a11db2d5e3027e
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] be9f7ef5adc7bea45923f43fb0b076e37bffa66af42a90e375474a5d0bb6ef29
[INFO] running `Command { std: "docker" "start" "-a" "be9f7ef5adc7bea45923f43fb0b076e37bffa66af42a90e375474a5d0bb6ef29", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling io-lifetimes v0.6.1
[INFO] [stderr]    Compiling rustix v0.34.8
[INFO] [stderr]    Compiling linux-raw-sys v0.0.46
[INFO] [stderr]    Compiling smallvec v1.8.0
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling endian-type v0.1.2
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]    Compiling utf8parse v0.2.0
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling nibble_vec v0.1.0
[INFO] [stderr]    Compiling libprocmem v0.1.2
[INFO] [stderr]    Compiling quoted_strings v0.1.0
[INFO] [stderr]    Compiling radix_trie v0.2.1
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling nix v0.23.1
[INFO] [stderr]    Compiling dirs-next v2.0.0
[INFO] [stderr]    Compiling fd-lock v3.0.5
[INFO] [stderr]    Compiling rustyline v9.1.2
[INFO] [stderr]    Compiling mempeek v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0635]: unknown feature `array_chunks`
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(array_chunks)]
[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 `mempeek` (bin "mempeek") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "be9f7ef5adc7bea45923f43fb0b076e37bffa66af42a90e375474a5d0bb6ef29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be9f7ef5adc7bea45923f43fb0b076e37bffa66af42a90e375474a5d0bb6ef29", kill_on_drop: false }`
[INFO] [stdout] be9f7ef5adc7bea45923f43fb0b076e37bffa66af42a90e375474a5d0bb6ef29