[INFO] fetching crate hash-table 0.2.4...
[INFO] testing hash-table-0.2.4 against 1.47.0 for beta-1.48-1
[INFO] extracting crate hash-table 0.2.4 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate hash-table 0.2.4 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate hash-table 0.2.4
[INFO] finished tweaking crates.io crate hash-table 0.2.4
[INFO] tweaked toml for crates.io crate hash-table 0.2.4 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 22d770c1532dce9eb23754b0dce52ed30d1cab744d90464cd4bed41ce1c2f1bc
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "22d770c1532dce9eb23754b0dce52ed30d1cab744d90464cd4bed41ce1c2f1bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "22d770c1532dce9eb23754b0dce52ed30d1cab744d90464cd4bed41ce1c2f1bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22d770c1532dce9eb23754b0dce52ed30d1cab744d90464cd4bed41ce1c2f1bc", kill_on_drop: false }`
[INFO] [stdout] 22d770c1532dce9eb23754b0dce52ed30d1cab744d90464cd4bed41ce1c2f1bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=warn" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d77aaa6387cf019261df61b194f62c637f5ca83b3514dd761b436038b37975bf
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d77aaa6387cf019261df61b194f62c637f5ca83b3514dd761b436038b37975bf", kill_on_drop: false }`
[INFO] [stderr]    Compiling hash-table v0.2.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(maybe_uninit_ref)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(non_ascii_idents)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: The usage of Script Group `Greek` in this crate consists solely of mixed script confusables
[INFO] [stdout]    --> src/lib.rs:166:13
[INFO] [stdout]     |
[INFO] [stdout] 166 |             φ: PhantomData,
[INFO] [stdout]     |             ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mixed_script_confusables)]` on by default
[INFO] [stdout]     = note: The usage includes 'φ' (U+03C6).
[INFO] [stdout]     = note: Please recheck to make sure their usages are indeed what you want.
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hash-table`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "d77aaa6387cf019261df61b194f62c637f5ca83b3514dd761b436038b37975bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d77aaa6387cf019261df61b194f62c637f5ca83b3514dd761b436038b37975bf", kill_on_drop: false }`
[INFO] [stdout] d77aaa6387cf019261df61b194f62c637f5ca83b3514dd761b436038b37975bf
