[INFO] crate uhttp_json_api 0.6.1 is already in cache
[INFO] testing uhttp_json_api-0.6.1 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate uhttp_json_api 0.6.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate uhttp_json_api 0.6.1 on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate uhttp_json_api 0.6.1
[INFO] finished tweaking crates.io crate uhttp_json_api 0.6.1
[INFO] tweaked toml for crates.io crate uhttp_json_api 0.6.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 84ba02a8c836f02fe1d53c8f2b1ea3d0a699bd962646cf5b02109a5ddb7d18a8
[INFO] running `"docker" "start" "-a" "84ba02a8c836f02fe1d53c8f2b1ea3d0a699bd962646cf5b02109a5ddb7d18a8"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling subslice_index v0.5.0
[INFO] [stderr]    Compiling uhttp_version v0.6.0
[INFO] [stderr]    Compiling uhttp_transfer_encoding v0.5.0
[INFO] [stderr]    Compiling uhttp_status v0.10.0
[INFO] [stderr]    Compiling uhttp_body_bytes v0.5.2
[INFO] [stderr]    Compiling uhttp_request_target v0.6.0
[INFO] [stderr]    Compiling uhttp_method v0.10.0
[INFO] [stderr]    Compiling uhttp_chunked_bytes v0.5.0
[INFO] [stderr]    Compiling uhttp_content_encoding v0.5.1
[INFO] [stderr]    Compiling uhttp_uri v0.5.1
[INFO] [stderr]    Compiling uhttp_request v0.5.1
[INFO] [stderr]    Compiling uhttp_media_type v0.5.0
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/uhttp_transfer_encoding-0.5.0/src/lib.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | #![feature(conservative_impl_trait)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/uhttp_version-0.6.0/src/lib.rs:33:1
[INFO] [stderr]    |
[INFO] [stderr] 33 | #![feature(field_init_shorthand)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/uhttp_version-0.6.0/src/lib.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | #![feature(static_in_const)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/uhttp_content_encoding-0.5.1/src/lib.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | #![feature(conservative_impl_trait)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `uhttp_version`.
[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] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/uhttp_request-0.5.1/src/lib.rs:36:1
[INFO] [stderr]    |
[INFO] [stderr] 36 | #![feature(field_init_shorthand)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/uhttp_request-0.5.1/src/lib.rs:37:1
[INFO] [stderr]    |
[INFO] [stderr] 37 | #![feature(conservative_impl_trait)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/uhttp_media_type-0.5.0/src/lib.rs:30:1
[INFO] [stderr]    |
[INFO] [stderr] 30 | #![feature(field_init_shorthand)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "84ba02a8c836f02fe1d53c8f2b1ea3d0a699bd962646cf5b02109a5ddb7d18a8"`
[INFO] running `"docker" "rm" "-f" "84ba02a8c836f02fe1d53c8f2b1ea3d0a699bd962646cf5b02109a5ddb7d18a8"`
[INFO] [stdout] 84ba02a8c836f02fe1d53c8f2b1ea3d0a699bd962646cf5b02109a5ddb7d18a8