[INFO] fetching crate myelin-engine 0.14.1... [INFO] testing myelin-engine-0.14.1 against beta-2021-01-01 for beta-1.50-1 [INFO] extracting crate myelin-engine 0.14.1 into /workspace/builds/worker-6/source [INFO] validating manifest of crates.io crate myelin-engine 0.14.1 on toolchain beta-2021-01-01 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking crates.io crate myelin-engine 0.14.1 [INFO] finished tweaking crates.io crate myelin-engine 0.14.1 [INFO] tweaked toml for crates.io crate myelin-engine 0.14.1 written to /workspace/builds/worker-6/source/Cargo.toml [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }` [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded ordermap v0.3.5 [INFO] [stderr] Downloaded myelin-geometry v2.4.1 [INFO] [stderr] Downloaded mockiato v0.9.5 [INFO] [stderr] Downloaded downcast-rs v1.2.0 [INFO] [stderr] Downloaded approx v0.3.2 [INFO] [stderr] Downloaded nameof v1.2.1 [INFO] [stderr] Downloaded matrixmultiply v0.2.4 [INFO] [stderr] Downloaded slotmap v0.3.0 [INFO] [stderr] Downloaded nalgebra v0.18.1 [INFO] [stderr] Downloaded fixedbitset v0.1.9 [INFO] [stderr] Downloaded petgraph v0.4.13 [INFO] [stderr] Downloaded rawpointer v0.2.1 [INFO] [stderr] Downloaded generational-arena v0.2.8 [INFO] [stderr] Downloaded alga v0.9.3 [INFO] [stderr] Downloaded mockiato-codegen v0.9.5 [INFO] [stderr] Downloaded nphysics2d v0.12.3 [INFO] [stderr] Downloaded ncollide2d v0.20.1 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 2b32de5b68ffd73eac6c16fba351f36c83dc0d65ba68df13bacc37301f10ecd6 [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" "2b32de5b68ffd73eac6c16fba351f36c83dc0d65ba68df13bacc37301f10ecd6", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "2b32de5b68ffd73eac6c16fba351f36c83dc0d65ba68df13bacc37301f10ecd6", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2b32de5b68ffd73eac6c16fba351f36c83dc0d65ba68df13bacc37301f10ecd6", kill_on_drop: false }` [INFO] [stdout] 2b32de5b68ffd73eac6c16fba351f36c83dc0d65ba68df13bacc37301f10ecd6 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+beta-2021-01-01" "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] 761f74fb6f7b39151fa7d8e49060103d6ecabf7c146d4a9d0fdca0582f25f5d1 [INFO] running `Command { std: "docker" "start" "-a" "761f74fb6f7b39151fa7d8e49060103d6ecabf7c146d4a9d0fdca0582f25f5d1", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.24 [INFO] [stderr] Compiling slotmap v0.3.0 [INFO] [stderr] Compiling nameof v1.2.1 [INFO] [stderr] Compiling num-traits v0.2.14 [INFO] [stderr] Compiling num-complex v0.2.4 [INFO] [stderr] Compiling num-rational v0.2.4 [INFO] [stderr] Compiling rand v0.6.5 [INFO] [stderr] Compiling quote v1.0.8 [INFO] [stderr] Compiling syn v1.0.57 [INFO] [stderr] Compiling num-integer v0.1.44 [INFO] [stderr] Compiling approx v0.3.2 [INFO] [stderr] Compiling alga v0.9.3 [INFO] [stderr] Compiling nalgebra v0.18.1 [INFO] [stderr] Compiling serde_derive v1.0.118 [INFO] [stderr] Compiling serde v1.0.118 [INFO] [stderr] Compiling ncollide2d v0.20.1 [INFO] [stderr] Compiling myelin-geometry v2.4.1 [INFO] [stderr] Compiling nphysics2d v0.12.3 [INFO] [stderr] Compiling myelin-engine v0.14.1 (/opt/rustwide/workdir) [INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel [INFO] [stdout] --> src/lib.rs:5:1 [INFO] [stdout] | [INFO] [stdout] 5 | #![feature(specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel [INFO] [stdout] --> src/lib.rs:6:1 [INFO] [stdout] | [INFO] [stdout] 6 | #![feature(non_exhaustive)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel [INFO] [stdout] --> src/lib.rs:7:1 [INFO] [stdout] | [INFO] [stdout] 7 | #![feature(box_syntax)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel [INFO] [stdout] --> src/lib.rs:8:1 [INFO] [stdout] | [INFO] [stdout] 8 | #![feature(trait_alias)] [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:5:12 [INFO] [stdout] | [INFO] [stdout] 5 | #![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 4 previous errors; 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 `myelin-engine` [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `Command { std: "docker" "inspect" "761f74fb6f7b39151fa7d8e49060103d6ecabf7c146d4a9d0fdca0582f25f5d1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "761f74fb6f7b39151fa7d8e49060103d6ecabf7c146d4a9d0fdca0582f25f5d1", kill_on_drop: false }` [INFO] [stdout] 761f74fb6f7b39151fa7d8e49060103d6ecabf7c146d4a9d0fdca0582f25f5d1