[INFO] fetching crate polars_arrow_rvsry99dx 0.17.1... [INFO] testing polars_arrow_rvsry99dx-0.17.1 against beta-2022-02-22 for beta-1.60-1 [INFO] extracting crate polars_arrow_rvsry99dx 0.17.1 into /workspace/builds/worker-96/source [INFO] validating manifest of crates.io crate polars_arrow_rvsry99dx 0.17.1 on toolchain beta-2022-02-22 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate polars_arrow_rvsry99dx 0.17.1 [INFO] finished tweaking crates.io crate polars_arrow_rvsry99dx 0.17.1 [INFO] tweaked toml for crates.io crate polars_arrow_rvsry99dx 0.17.1 written to /workspace/builds/worker-96/source/Cargo.toml [INFO] crate crates.io crate polars_arrow_rvsry99dx 0.17.1 already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded hermit-abi v0.1.14 [INFO] [stderr] Downloaded proc-macro2 v1.0.18 [INFO] [stderr] Downloaded wasm-bindgen-macro v0.2.63 [INFO] [stderr] Downloaded criterion v0.3.2 [INFO] [stderr] Downloaded adler32 v1.1.0 [INFO] [stderr] Downloaded flate2 v1.0.14 [INFO] [stderr] Downloaded packed_simd v0.3.3 [INFO] [stderr] Downloaded criterion-plot v0.4.2 [INFO] [stderr] Downloaded wasm-bindgen-shared v0.2.63 [INFO] [stderr] Downloaded wasm-bindgen-backend v0.2.63 [INFO] [stderr] Downloaded js-sys v0.3.40 [INFO] [stderr] Downloaded memoffset v0.5.4 [INFO] [stderr] Downloaded flatbuffers v0.6.1 [INFO] [stderr] Downloaded web-sys v0.3.40 [INFO] [stderr] Downloaded serde_json v1.0.55 [INFO] [stderr] Downloaded wasm-bindgen-macro-support v0.2.63 [INFO] [stderr] Downloaded wasm-bindgen v0.2.63 [INFO] [stderr] Downloaded syn v1.0.33 [INFO] [stderr] Downloaded indexmap v1.4.0 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 2c2f95b7da074c9ee79699bebb6b27626757bab001117c18fa802bcb8b2455d0 [INFO] running `Command { std: "docker" "start" "-a" "2c2f95b7da074c9ee79699bebb6b27626757bab001117c18fa802bcb8b2455d0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "2c2f95b7da074c9ee79699bebb6b27626757bab001117c18fa802bcb8b2455d0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2c2f95b7da074c9ee79699bebb6b27626757bab001117c18fa802bcb8b2455d0", kill_on_drop: false }` [INFO] [stdout] 2c2f95b7da074c9ee79699bebb6b27626757bab001117c18fa802bcb8b2455d0 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 600c1e9b25b63b5d6a69d6507976c8a3b8056ec2c6f98ea475b8bdc746ad179d [INFO] running `Command { std: "docker" "start" "-a" "600c1e9b25b63b5d6a69d6507976c8a3b8056ec2c6f98ea475b8bdc746ad179d", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling autocfg v1.0.0 [INFO] [stderr] Compiling libc v0.2.71 [INFO] [stderr] Compiling memchr v2.3.3 [INFO] [stderr] Compiling byteorder v1.3.4 [INFO] [stderr] Compiling serde v1.0.114 [INFO] [stderr] Compiling ryu v1.0.5 [INFO] [stderr] Compiling proc-macro2 v1.0.18 [INFO] [stderr] Compiling getrandom v0.1.14 [INFO] [stderr] Compiling unicode-xid v0.2.1 [INFO] [stderr] Compiling itoa v0.4.6 [INFO] [stderr] Compiling syn v1.0.33 [INFO] [stderr] Compiling serde_json v1.0.55 [INFO] [stderr] Compiling ppv-lite86 v0.2.8 [INFO] [stderr] Compiling serde_derive v1.0.114 [INFO] [stderr] Compiling regex-syntax v0.6.18 [INFO] [stderr] Compiling encode_unicode v0.3.6 [INFO] [stderr] Compiling smallvec v1.4.0 [INFO] [stderr] Compiling unicode-width v0.1.7 [INFO] [stderr] Compiling hex v0.4.2 [INFO] [stderr] Compiling thread_local v1.0.1 [INFO] [stderr] Compiling flatbuffers v0.6.1 [INFO] [stderr] Compiling num-traits v0.2.12 [INFO] [stderr] Compiling num-integer v0.1.43 [INFO] [stderr] Compiling num-bigint v0.2.6 [INFO] [stderr] Compiling indexmap v1.4.0 [INFO] [stderr] Compiling num-iter v0.1.41 [INFO] [stderr] Compiling num-complex v0.2.4 [INFO] [stderr] Compiling num-rational v0.2.4 [INFO] [stderr] Compiling csv-core v0.1.10 [INFO] [stderr] Compiling aho-corasick v0.7.13 [INFO] [stderr] Compiling quote v1.0.7 [INFO] [stderr] Compiling dirs v1.0.5 [INFO] [stderr] Compiling time v0.1.43 [INFO] [stderr] Compiling atty v0.2.14 [INFO] [stderr] Compiling regex-automata v0.1.9 [INFO] [stderr] Compiling term v0.5.2 [INFO] [stderr] Compiling rand_core v0.5.1 [INFO] [stderr] Compiling rand_chacha v0.2.2 [INFO] [stderr] Compiling regex v1.3.9 [INFO] [stderr] Compiling rand v0.7.3 [INFO] [stderr] Compiling chrono v0.4.11 [INFO] [stderr] Compiling bstr v0.2.13 [INFO] [stderr] Compiling num v0.2.1 [INFO] [stderr] Compiling csv v1.1.3 [INFO] [stderr] Compiling prettytable-rs v0.8.0 [INFO] [stderr] Compiling polars_arrow_rvsry99dx v0.17.1 (/opt/rustwide/workdir) [INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel [INFO] [stdout] --> src/lib.rs:24:1 [INFO] [stdout] | [INFO] [stdout] 24 | #![feature(specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes [INFO] [stdout] --> src/lib.rs:24:12 [INFO] [stdout] | [INFO] [stdout] 24 | #![feature(specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(incomplete_features)]` on by default [INFO] [stdout] = note: see issue #31844 for more information [INFO] [stdout] = help: consider using `min_specialization` instead, which is more stable and complete [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to previous error; 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 `polars_arrow_rvsry99dx` due to 2 previous errors; 1 warning emitted [INFO] running `Command { std: "docker" "inspect" "600c1e9b25b63b5d6a69d6507976c8a3b8056ec2c6f98ea475b8bdc746ad179d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "600c1e9b25b63b5d6a69d6507976c8a3b8056ec2c6f98ea475b8bdc746ad179d", kill_on_drop: false }` [INFO] [stdout] 600c1e9b25b63b5d6a69d6507976c8a3b8056ec2c6f98ea475b8bdc746ad179d