[INFO] fetching crate aml_parser 0.3.0...
[INFO] extracting crate aml_parser 0.3.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/aml_parser/0.3.0
[INFO] extracting crate aml_parser 0.3.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/aml_parser/0.3.0
[INFO] validating manifest of aml_parser-0.3.0 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of aml_parser-0.3.0 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing aml_parser-0.3.0
[INFO] finished frobbing aml_parser-0.3.0
[INFO] frobbed toml for aml_parser-0.3.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/aml_parser/0.3.0/Cargo.toml
[INFO] started frobbing aml_parser-0.3.0
[INFO] finished frobbing aml_parser-0.3.0
[INFO] frobbed toml for aml_parser-0.3.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/aml_parser/0.3.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing aml_parser-0.3.0 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/aml_parser/0.3.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 544cd09d8b81ff69cd243f7badc5ec320f25b37b1e9a7d7d7323de7a3eabb83c
[INFO] running `"docker" "start" "-a" "544cd09d8b81ff69cd243f7badc5ec320f25b37b1e9a7d7d7323de7a3eabb83c"`
[INFO] [stderr]    Compiling bit_field v0.9.0
[INFO] [stderr]    Compiling aml_parser v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]   --> src/lib.rs:30:1
[INFO] [stderr]    |
[INFO] [stderr] 30 | #![feature(decl_macro, type_ascription, box_syntax)]
[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: Could not compile `aml_parser`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "544cd09d8b81ff69cd243f7badc5ec320f25b37b1e9a7d7d7323de7a3eabb83c"`
[INFO] running `"docker" "rm" "-f" "544cd09d8b81ff69cd243f7badc5ec320f25b37b1e9a7d7d7323de7a3eabb83c"`
[INFO] [stdout] 544cd09d8b81ff69cd243f7badc5ec320f25b37b1e9a7d7d7323de7a3eabb83c