[INFO] fetching crate rain-lang 0.0.1...
[INFO] testing rain-lang-0.0.1 against 1.47.0 for beta-1.48-1
[INFO] extracting crate rain-lang 0.0.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate rain-lang 0.0.1 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 rain-lang 0.0.1
[INFO] removed 1 missing examples
[INFO] finished tweaking crates.io crate rain-lang 0.0.1
[INFO] tweaked toml for crates.io crate rain-lang 0.0.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate rain-lang 0.0.1 already has a lockfile, it will not be regenerated
[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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] b97d89a03efb159508fe57b8bb6ede16f133086584cbf17a21e4a7e435bdd6ee
[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" "b97d89a03efb159508fe57b8bb6ede16f133086584cbf17a21e4a7e435bdd6ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b97d89a03efb159508fe57b8bb6ede16f133086584cbf17a21e4a7e435bdd6ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b97d89a03efb159508fe57b8bb6ede16f133086584cbf17a21e4a7e435bdd6ee", kill_on_drop: false }`
[INFO] [stdout] b97d89a03efb159508fe57b8bb6ede16f133086584cbf17a21e4a7e435bdd6ee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 8838d12dbe473f6a8f631ac0146617331246555b72659f33527b6f477ffc4a64
[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" "8838d12dbe473f6a8f631ac0146617331246555b72659f33527b6f477ffc4a64", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro-hack v0.5.15
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling smallvec v1.2.0
[INFO] [stderr]    Compiling static_assertions v0.3.4
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]    Compiling nom v5.1.1
[INFO] [stderr]    Compiling lock_api v0.3.3
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling lexical-core v0.6.2
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_xoshiro v0.4.0
[INFO] [stderr]    Compiling parking_lot_core v0.7.0
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling parking_lot v0.10.0
[INFO] [stderr]    Compiling const-random-macro v0.1.8
[INFO] [stderr]    Compiling const-random v0.1.8
[INFO] [stderr]    Compiling ahash v0.3.3
[INFO] [stderr]    Compiling dashmap v3.11.1
[INFO] [stderr]    Compiling num v0.2.1
[INFO] [stderr]    Compiling rain-lang v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(weak_into_raw)]
[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 `rain-lang`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "8838d12dbe473f6a8f631ac0146617331246555b72659f33527b6f477ffc4a64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8838d12dbe473f6a8f631ac0146617331246555b72659f33527b6f477ffc4a64", kill_on_drop: false }`
[INFO] [stdout] 8838d12dbe473f6a8f631ac0146617331246555b72659f33527b6f477ffc4a64
