[INFO] fetching crate staticvec 0.10.2...
[INFO] testing staticvec-0.10.2 against beta-2020-07-24 for beta-1.46-1
[INFO] extracting crate staticvec 0.10.2 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate staticvec 0.10.2 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate staticvec 0.10.2
[INFO] removed 3 missing examples
[INFO] removed 3 missing tests
[INFO] finished tweaking crates.io crate staticvec 0.10.2
[INFO] tweaked toml for crates.io crate staticvec 0.10.2 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate staticvec 0.10.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 83b9617c8cbd2b5a5100d43caa2d15ceced122cc10a368e80611284905eac259
[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" "83b9617c8cbd2b5a5100d43caa2d15ceced122cc10a368e80611284905eac259", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "83b9617c8cbd2b5a5100d43caa2d15ceced122cc10a368e80611284905eac259", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83b9617c8cbd2b5a5100d43caa2d15ceced122cc10a368e80611284905eac259", kill_on_drop: false }`
[INFO] [stdout] 83b9617c8cbd2b5a5100d43caa2d15ceced122cc10a368e80611284905eac259
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 555d8776e3467d2526c68433eed9483eeb6bd01f41e54a3a8210fdce0a3ec217
[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" "555d8776e3467d2526c68433eed9483eeb6bd01f41e54a3a8210fdce0a3ec217", kill_on_drop: false }`
[INFO] [stderr]    Compiling staticvec v0.10.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:30:1
[INFO] [stdout]    |
[INFO] [stdout] 30 | / #![feature(
[INFO] [stdout] 31 | |   const_fn,
[INFO] [stdout] 32 | |   const_fn_union,
[INFO] [stdout] 33 | |   const_generics,
[INFO] [stdout] ...  |
[INFO] [stdout] 49 | |   untagged_unions
[INFO] [stdout] 50 | | )]
[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:51:30
[INFO] [stdout]    |
[INFO] [stdout] 51 | #![cfg_attr(feature = "std", feature(read_initializer))]
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `staticvec`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "555d8776e3467d2526c68433eed9483eeb6bd01f41e54a3a8210fdce0a3ec217", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "555d8776e3467d2526c68433eed9483eeb6bd01f41e54a3a8210fdce0a3ec217", kill_on_drop: false }`
[INFO] [stdout] 555d8776e3467d2526c68433eed9483eeb6bd01f41e54a3a8210fdce0a3ec217