[INFO] updating cached repository rylev/hashmap-compare
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rylev/hashmap-compare
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rylev/hashmap-compare" "work/ex/beta-1.37-6/sources/1.36.0/gh/rylev/hashmap-compare"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/rylev/hashmap-compare'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rylev/hashmap-compare" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/rylev/hashmap-compare"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/rylev/hashmap-compare'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 57c5a6f7acff01af9969ae949c08a1a6bae13e09
[INFO] sha for GitHub repo rylev/hashmap-compare: 57c5a6f7acff01af9969ae949c08a1a6bae13e09
[INFO] validating manifest of rylev/hashmap-compare 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 rylev/hashmap-compare 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 rylev/hashmap-compare
[INFO] finished frobbing rylev/hashmap-compare
[INFO] frobbed toml for rylev/hashmap-compare written to work/ex/beta-1.37-6/sources/1.36.0/gh/rylev/hashmap-compare/Cargo.toml
[INFO] started frobbing rylev/hashmap-compare
[INFO] finished frobbing rylev/hashmap-compare
[INFO] frobbed toml for rylev/hashmap-compare written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/rylev/hashmap-compare/Cargo.toml
[INFO] crate rylev/hashmap-compare already has a lockfile, it will not be regenerated
[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 rylev/hashmap-compare 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/gh/rylev/hashmap-compare:/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] 9513dc70879a49d3b11fdc09ebf9d931831cffb626ef2e7105599ffc2bf20fe3
[INFO] running `"docker" "start" "-a" "9513dc70879a49d3b11fdc09ebf9d931831cffb626ef2e7105599ffc2bf20fe3"`
[INFO] [stderr]    Compiling hash-compare v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `"docker" "inspect" "9513dc70879a49d3b11fdc09ebf9d931831cffb626ef2e7105599ffc2bf20fe3"`
[INFO] running `"docker" "rm" "-f" "9513dc70879a49d3b11fdc09ebf9d931831cffb626ef2e7105599ffc2bf20fe3"`
[INFO] [stdout] 9513dc70879a49d3b11fdc09ebf9d931831cffb626ef2e7105599ffc2bf20fe3
[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/gh/rylev/hashmap-compare:/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] 1d5a9e2f91c6b1eca5778c5b1d3cc577bab01c404d7f2201026063f7f97f463d
[INFO] running `"docker" "start" "-a" "1d5a9e2f91c6b1eca5778c5b1d3cc577bab01c404d7f2201026063f7f97f463d"`
[INFO] [stderr]    Compiling hash-compare v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:19
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![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 `hash-compare`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "1d5a9e2f91c6b1eca5778c5b1d3cc577bab01c404d7f2201026063f7f97f463d"`
[INFO] running `"docker" "rm" "-f" "1d5a9e2f91c6b1eca5778c5b1d3cc577bab01c404d7f2201026063f7f97f463d"`
[INFO] [stdout] 1d5a9e2f91c6b1eca5778c5b1d3cc577bab01c404d7f2201026063f7f97f463d