[INFO] crate reactive-streams 0.0.1 is already in cache
[INFO] extracting crate reactive-streams 0.0.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/reactive-streams/0.0.1
[INFO] extracting crate reactive-streams 0.0.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/reactive-streams/0.0.1
[INFO] validating manifest of reactive-streams-0.0.1 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 reactive-streams-0.0.1 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 reactive-streams-0.0.1
[INFO] finished frobbing reactive-streams-0.0.1
[INFO] frobbed toml for reactive-streams-0.0.1 written to work/ex/beta-1.37-6/sources/1.36.0/reg/reactive-streams/0.0.1/Cargo.toml
[INFO] started frobbing reactive-streams-0.0.1
[INFO] finished frobbing reactive-streams-0.0.1
[INFO] frobbed toml for reactive-streams-0.0.1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/reactive-streams/0.0.1/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 reactive-streams-0.0.1 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/reactive-streams/0.0.1:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] ba0180fe5b9a12bd2d5341cd301929b8fedf903a65bf580fb789dfc601e377d5
[INFO] running `"docker" "start" "-a" "ba0180fe5b9a12bd2d5341cd301929b8fedf903a65bf580fb789dfc601e377d5"`
[INFO] [stderr]    Compiling reactive-streams v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0038]: the trait `Subscriber` cannot be made into an object
[INFO] [stderr]  --> src/lib.rs:3:3
[INFO] [stderr]   |
[INFO] [stderr] 3 |   fn subscribe(s: Subscriber<T>);
[INFO] [stderr]   |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Subscriber` cannot be made into an object
[INFO] [stderr]   |
[INFO] [stderr]   = note: method `onSubscribe` has no receiver
[INFO] [stderr]   = note: method `onNext` has no receiver
[INFO] [stderr]   = note: method `onError` has no receiver
[INFO] [stderr]   = note: method `onComplete` has no receiver
[INFO] [stderr] 
[INFO] [stderr] error[E0038]: the trait `Subscription` cannot be made into an object
[INFO] [stderr]   --> src/lib.rs:15:3
[INFO] [stderr]    |
[INFO] [stderr] 15 |   fn onSubscribe(s: Subscription);
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Subscription` cannot be made into an object
[INFO] [stderr]    |
[INFO] [stderr]    = note: method `request` has no receiver
[INFO] [stderr]    = note: method `cancel` has no receiver
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0038`.
[INFO] [stderr] error: Could not compile `reactive-streams`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ba0180fe5b9a12bd2d5341cd301929b8fedf903a65bf580fb789dfc601e377d5"`
[INFO] running `"docker" "rm" "-f" "ba0180fe5b9a12bd2d5341cd301929b8fedf903a65bf580fb789dfc601e377d5"`
[INFO] [stdout] ba0180fe5b9a12bd2d5341cd301929b8fedf903a65bf580fb789dfc601e377d5