[INFO] fetching crate arrow 2.0.0... [INFO] testing arrow-2.0.0 against 1.49.0 for beta-1.50-1 [INFO] extracting crate arrow 2.0.0 into /workspace/builds/worker-2/source [INFO] validating manifest of crates.io crate arrow 2.0.0 on toolchain 1.49.0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking crates.io crate arrow 2.0.0 [INFO] finished tweaking crates.io crate arrow 2.0.0 [INFO] tweaked toml for crates.io crate arrow 2.0.0 written to /workspace/builds/worker-2/source/Cargo.toml [INFO] crate crates.io crate arrow 2.0.0 already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 382efee32a7572b59e6815c410a5502938c4845cb4745fdd400a1030ae7a04c4 [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" "382efee32a7572b59e6815c410a5502938c4845cb4745fdd400a1030ae7a04c4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "382efee32a7572b59e6815c410a5502938c4845cb4745fdd400a1030ae7a04c4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "382efee32a7572b59e6815c410a5502938c4845cb4745fdd400a1030ae7a04c4", kill_on_drop: false }` [INFO] [stdout] 382efee32a7572b59e6815c410a5502938c4845cb4745fdd400a1030ae7a04c4 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 4673a9497c1655d7d1ab33d0a99610f7f073b64a14d9e989312d66e85ac85f44 [INFO] running `Command { std: "docker" "start" "-a" "4673a9497c1655d7d1ab33d0a99610f7f073b64a14d9e989312d66e85ac85f44", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.79 [INFO] [stderr] Compiling proc-macro2 v1.0.24 [INFO] [stderr] Compiling serde v1.0.117 [INFO] [stderr] Compiling getrandom v0.1.15 [INFO] [stderr] Compiling byteorder v1.3.4 [INFO] [stderr] Compiling syn v1.0.45 [INFO] [stderr] Compiling serde_derive v1.0.117 [INFO] [stderr] Compiling serde_json v1.0.59 [INFO] [stderr] Compiling ppv-lite86 v0.2.9 [INFO] [stderr] Compiling itoa v0.4.6 [INFO] [stderr] Compiling regex-syntax v0.6.20 [INFO] [stderr] Compiling smallvec v1.4.2 [INFO] [stderr] Compiling hex v0.4.2 [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 indexmap v1.6.0 [INFO] [stderr] Compiling num-iter v0.1.41 [INFO] [stderr] Compiling num-rational v0.3.0 [INFO] [stderr] Compiling flatbuffers v0.6.1 [INFO] [stderr] Compiling csv-core v0.1.10 [INFO] [stderr] Compiling aho-corasick v0.7.14 [INFO] [stderr] Compiling regex-automata v0.1.9 [INFO] [stderr] Compiling quote v1.0.7 [INFO] [stderr] Compiling time v0.1.44 [INFO] [stderr] Compiling rand_core v0.5.1 [INFO] [stderr] Compiling rand_chacha v0.2.2 [INFO] [stderr] Compiling num-complex v0.3.0 [INFO] [stderr] Compiling rand v0.7.3 [INFO] [stderr] Compiling chrono v0.4.19 [INFO] [stderr] Compiling regex v1.4.1 [INFO] [stderr] Compiling num v0.3.0 [INFO] [stderr] Compiling bstr v0.2.14 [INFO] [stderr] Compiling csv v1.1.3 [INFO] [stderr] Compiling arrow v2.0.0 (/opt/rustwide/workdir) [INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel [INFO] [stdout] --> src/lib.rs:127:1 [INFO] [stdout] | [INFO] [stdout] 127 | #![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:127:12 [INFO] [stdout] | [INFO] [stdout] 127 | #![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 `arrow` [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `Command { std: "docker" "inspect" "4673a9497c1655d7d1ab33d0a99610f7f073b64a14d9e989312d66e85ac85f44", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4673a9497c1655d7d1ab33d0a99610f7f073b64a14d9e989312d66e85ac85f44", kill_on_drop: false }` [INFO] [stdout] 4673a9497c1655d7d1ab33d0a99610f7f073b64a14d9e989312d66e85ac85f44