[INFO] fetching crate polars 0.7.3...
[INFO] testing polars-0.7.3 against beta-2020-10-09 for beta-1.48-1
[INFO] extracting crate polars 0.7.3 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate polars 0.7.3 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate polars 0.7.3
[INFO] finished tweaking crates.io crate polars 0.7.3
[INFO] tweaked toml for crates.io crate polars 0.7.3 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thrift v0.13.0
[INFO] [stderr]   Downloaded parquet-format v2.6.1
[INFO] [stderr]   Downloaded integer-encoding v1.1.5
[INFO] [stderr]   Downloaded unsafe_unwrap v0.1.0
[INFO] [stderr]   Downloaded arrow v1.0.1
[INFO] [stderr]   Downloaded parquet v1.0.1
[INFO] [stderr]   Downloaded rand_distr v0.3.0
[INFO] [stderr]   Downloaded packed_simd_2 v0.3.4
[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" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] efd73937c719ad1c1c8ef3d5a87723efc3d1739b5d81f7cb58090dd369469f96
[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" "efd73937c719ad1c1c8ef3d5a87723efc3d1739b5d81f7cb58090dd369469f96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "efd73937c719ad1c1c8ef3d5a87723efc3d1739b5d81f7cb58090dd369469f96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efd73937c719ad1c1c8ef3d5a87723efc3d1739b5d81f7cb58090dd369469f96", kill_on_drop: false }`
[INFO] [stdout] efd73937c719ad1c1c8ef3d5a87723efc3d1739b5d81f7cb58090dd369469f96
[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" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f2a385bd52f980d93a13df76d022f0a3ec4e04fc41c00cbb3a1e1001e3c71fb4
[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" "f2a385bd52f980d93a13df76d022f0a3ec4e04fc41c00cbb3a1e1001e3c71fb4", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]    Compiling libm v0.1.4
[INFO] [stderr]    Compiling packed_simd_2 v0.3.4
[INFO] [stderr]    Compiling hex v0.4.2
[INFO] [stderr]    Compiling encode_unicode v0.3.6
[INFO] [stderr]    Compiling unsafe_unwrap v0.1.0
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-bigint v0.3.0
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.3.0
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling flatbuffers v0.6.1
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]    Compiling prettytable-rs v0.8.0
[INFO] [stderr]    Compiling num-complex v0.3.0
[INFO] [stderr]    Compiling chrono v0.4.19
[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/packed_simd_2-0.3.4/src/lib.rs:202:1
[INFO] [stdout]     |
[INFO] [stdout] 202 | / #![feature(
[INFO] [stdout] 203 | |     repr_simd,
[INFO] [stdout] 204 | |     rustc_attrs,
[INFO] [stdout] 205 | |     const_fn,
[INFO] [stdout] ...   |
[INFO] [stdout] 215 | |     llvm_asm
[INFO] [stdout] 216 | | )]
[INFO] [stdout]     | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling num v0.2.1
[INFO] [stderr]    Compiling num v0.3.0
[INFO] [stderr]    Compiling bstr v0.2.13
[INFO] [stderr]    Compiling csv v1.1.3
[INFO] [stderr]    Compiling arrow v1.0.1
[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/arrow-1.0.1/src/lib.rs:24:1
[INFO] [stdout]    |
[INFO] [stdout] 24 | #![feature(specialization)]
[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 `packed_simd_2`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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: build failed
[INFO] running `Command { std: "docker" "inspect" "f2a385bd52f980d93a13df76d022f0a3ec4e04fc41c00cbb3a1e1001e3c71fb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2a385bd52f980d93a13df76d022f0a3ec4e04fc41c00cbb3a1e1001e3c71fb4", kill_on_drop: false }`
[INFO] [stdout] f2a385bd52f980d93a13df76d022f0a3ec4e04fc41c00cbb3a1e1001e3c71fb4
