[INFO] crate lmdb-rkv 0.11.4 is already in cache
[INFO] extracting crate lmdb-rkv 0.11.4 into work/ex/beta-1.37-6/sources/1.36.0/reg/lmdb-rkv/0.11.4
[INFO] extracting crate lmdb-rkv 0.11.4 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/lmdb-rkv/0.11.4
[INFO] validating manifest of lmdb-rkv-0.11.4 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 lmdb-rkv-0.11.4 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 lmdb-rkv-0.11.4
[INFO] finished frobbing lmdb-rkv-0.11.4
[INFO] frobbed toml for lmdb-rkv-0.11.4 written to work/ex/beta-1.37-6/sources/1.36.0/reg/lmdb-rkv/0.11.4/Cargo.toml
[INFO] started frobbing lmdb-rkv-0.11.4
[INFO] finished frobbing lmdb-rkv-0.11.4
[INFO] frobbed toml for lmdb-rkv-0.11.4 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/lmdb-rkv/0.11.4/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 lmdb-rkv-0.11.4 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-4/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/lmdb-rkv/0.11.4:/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] 95a6dad2f87e4c5b3262d22b7e4f89a496b2024164f91ef128ca922b4df050ea
[INFO] running `"docker" "start" "-a" "95a6dad2f87e4c5b3262d22b7e4f89a496b2024164f91ef128ca922b4df050ea"`
[INFO] [stderr]    Compiling lmdb-rkv-sys v0.8.6
[INFO] [stderr]    Compiling lmdb-rkv v0.11.4 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.39s
[INFO] running `"docker" "inspect" "95a6dad2f87e4c5b3262d22b7e4f89a496b2024164f91ef128ca922b4df050ea"`
[INFO] running `"docker" "rm" "-f" "95a6dad2f87e4c5b3262d22b7e4f89a496b2024164f91ef128ca922b4df050ea"`
[INFO] [stdout] 95a6dad2f87e4c5b3262d22b7e4f89a496b2024164f91ef128ca922b4df050ea
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/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/lmdb-rkv/0.11.4:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] 027ab31e40234826f6288ec49daa10ec02cf402c88d4ee31a0295fd1dccac830
[INFO] running `"docker" "start" "-a" "027ab31e40234826f6288ec49daa10ec02cf402c88d4ee31a0295fd1dccac830"`
[INFO] [stderr]    Compiling lmdb-rkv v0.11.4 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:4:19
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![cfg_attr(test, feature(test))]
[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 `lmdb-rkv`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "027ab31e40234826f6288ec49daa10ec02cf402c88d4ee31a0295fd1dccac830"`
[INFO] running `"docker" "rm" "-f" "027ab31e40234826f6288ec49daa10ec02cf402c88d4ee31a0295fd1dccac830"`
[INFO] [stdout] 027ab31e40234826f6288ec49daa10ec02cf402c88d4ee31a0295fd1dccac830