[INFO] fetching crate rabbithole 0.3.1...
[INFO] checking rabbithole-0.3.1 against beta for pr-78714
[INFO] extracting crate rabbithole 0.3.1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate rabbithole 0.3.1 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rabbithole 0.3.1
[INFO] finished tweaking crates.io crate rabbithole 0.3.1
[INFO] tweaked toml for crates.io crate rabbithole 0.3.1 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 486e2efb699766a7526365020a96ff7b1797b6273eab5b475822b85d0f16b3ee
[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" "486e2efb699766a7526365020a96ff7b1797b6273eab5b475822b85d0f16b3ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "486e2efb699766a7526365020a96ff7b1797b6273eab5b475822b85d0f16b3ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "486e2efb699766a7526365020a96ff7b1797b6273eab5b475822b85d0f16b3ee", kill_on_drop: false }`
[INFO] [stdout] 486e2efb699766a7526365020a96ff7b1797b6273eab5b475822b85d0f16b3ee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d0bf2ea4175a600cd7be0ea57091022c7d99697dcfb46e9f8c2a1ef244097ba4
[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" "d0bf2ea4175a600cd7be0ea57091022c7d99697dcfb46e9f8c2a1ef244097ba4", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling frunk_core v0.3.1
[INFO] [stderr]     Checking strum v0.16.0
[INFO] [stderr]     Checking pest v2.0.2
[INFO] [stderr]    Compiling strum_macros v0.16.0
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]    Compiling rabbithole-derive v0.3.1
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]    Compiling pest_meta v2.0.3
[INFO] [stderr]    Compiling pest_generator v2.0.0
[INFO] [stderr]    Compiling pest_derive v2.0.1
[INFO] [stderr]    Compiling frunk_proc_macro_helpers v0.0.4
[INFO] [stderr]    Compiling frunk_proc_macros_impl v0.0.4
[INFO] [stderr]    Compiling frunk_derives v0.3.1
[INFO] [stderr]     Checking frunk_proc_macros v0.0.4
[INFO] [stderr]     Checking frunk v0.3.1
[INFO] [stderr]     Checking rsql-rs v0.2.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rsql-rs-0.2.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(backtrace)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rsql-rs`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "d0bf2ea4175a600cd7be0ea57091022c7d99697dcfb46e9f8c2a1ef244097ba4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0bf2ea4175a600cd7be0ea57091022c7d99697dcfb46e9f8c2a1ef244097ba4", kill_on_drop: false }`
[INFO] [stdout] d0bf2ea4175a600cd7be0ea57091022c7d99697dcfb46e9f8c2a1ef244097ba4