[INFO] crate ssb-packetstream 0.1.0 is already in cache
[INFO] extracting crate ssb-packetstream 0.1.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/ssb-packetstream/0.1.0
[INFO] extracting crate ssb-packetstream 0.1.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/ssb-packetstream/0.1.0
[INFO] validating manifest of ssb-packetstream-0.1.0 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 ssb-packetstream-0.1.0 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 ssb-packetstream-0.1.0
[INFO] finished frobbing ssb-packetstream-0.1.0
[INFO] frobbed toml for ssb-packetstream-0.1.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/ssb-packetstream/0.1.0/Cargo.toml
[INFO] started frobbing ssb-packetstream-0.1.0
[INFO] finished frobbing ssb-packetstream-0.1.0
[INFO] frobbed toml for ssb-packetstream-0.1.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/ssb-packetstream/0.1.0/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] [stderr]     Blocking waiting for file lock on package cache lock
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing ssb-packetstream-0.1.0 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-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/ssb-packetstream/0.1.0:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 60b054485a2f34cc467af7905428e15015ed9b85efbe553bfcb7b3c9b8f3c9ac
[INFO] running `"docker" "start" "-a" "60b054485a2f34cc467af7905428e15015ed9b85efbe553bfcb7b3c9b8f3c9ac"`
[INFO] [stderr]    Compiling futures-io-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling ssb-packetstream v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0437]: type `SinkError` is not a member of trait `Sink`
[INFO] [stderr]    --> src/sink.rs:143:5
[INFO] [stderr]     |
[INFO] [stderr] 143 |     type SinkError = Error;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^ not a member of trait `Sink`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(async_await)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0220]: associated type `SinkError` not found for `Self`
[INFO] [stderr]    --> src/sink.rs:145:78
[INFO] [stderr]     |
[INFO] [stderr] 145 |     fn poll_ready(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Result<(), Self::SinkError>> {
[INFO] [stderr]     |                                                                              ^^^^^^^^^^^^^^^ associated type `SinkError` not found
[INFO] [stderr] 
[INFO] [stderr] error[E0220]: associated type `SinkError` not found for `Self`
[INFO] [stderr]    --> src/sink.rs:149:73
[INFO] [stderr]     |
[INFO] [stderr] 149 |     fn start_send(mut self: Pin<&mut Self>, item: Packet) -> Result<(), Self::SinkError> {
[INFO] [stderr]     |                                                                         ^^^^^^^^^^^^^^^ associated type `SinkError` not found
[INFO] [stderr] 
[INFO] [stderr] error[E0220]: associated type `SinkError` not found for `Self`
[INFO] [stderr]    --> src/sink.rs:159:82
[INFO] [stderr]     |
[INFO] [stderr] 159 |     fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Result<(), Self::SinkError>> {
[INFO] [stderr]     |                                                                                  ^^^^^^^^^^^^^^^ associated type `SinkError` not found
[INFO] [stderr] 
[INFO] [stderr] error[E0220]: associated type `SinkError` not found for `Self`
[INFO] [stderr]    --> src/sink.rs:165:82
[INFO] [stderr]     |
[INFO] [stderr] 165 |     fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Result<(), Self::SinkError>> {
[INFO] [stderr]     |                                                                                  ^^^^^^^^^^^^^^^ associated type `SinkError` not found
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 6 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0220, E0437, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0220`.
[INFO] [stderr] error: Could not compile `ssb-packetstream`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "60b054485a2f34cc467af7905428e15015ed9b85efbe553bfcb7b3c9b8f3c9ac"`
[INFO] running `"docker" "rm" "-f" "60b054485a2f34cc467af7905428e15015ed9b85efbe553bfcb7b3c9b8f3c9ac"`
[INFO] [stdout] 60b054485a2f34cc467af7905428e15015ed9b85efbe553bfcb7b3c9b8f3c9ac