[INFO] crate korat_derive 0.1.3 is already in cache
[INFO] extracting crate korat_derive 0.1.3 into work/ex/beta-1.38-1/sources/1.37.0/reg/korat_derive/0.1.3
[INFO] extracting crate korat_derive 0.1.3 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/korat_derive/0.1.3
[INFO] validating manifest of korat_derive-0.1.3 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of korat_derive-0.1.3 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing korat_derive-0.1.3
[INFO] finished frobbing korat_derive-0.1.3
[INFO] frobbed toml for korat_derive-0.1.3 written to work/ex/beta-1.38-1/sources/1.37.0/reg/korat_derive/0.1.3/Cargo.toml
[INFO] started frobbing korat_derive-0.1.3
[INFO] finished frobbing korat_derive-0.1.3
[INFO] frobbed toml for korat_derive-0.1.3 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/korat_derive/0.1.3/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing korat_derive-0.1.3 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/korat_derive/0.1.3:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] f262457b4ddc11c8e3c4a8009aec869897692c27edb6c870ec70ec26c52ffd2c
[INFO] running `"docker" "start" "-a" "f262457b4ddc11c8e3c4a8009aec869897692c27edb6c870ec70ec26c52ffd2c"`
[INFO] [stderr]    Compiling rusoto_core v0.40.0
[INFO] [stderr]    Compiling rusoto_dynamodb v0.40.0
[INFO] [stderr]    Compiling korat v0.1.3
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/korat-0.1.3/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(try_from)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: a collection of type `std::collections::HashSet<std::vec::Vec<u8>>` cannot be built from an iterator over elements of type `bytes::bytes::Bytes`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/korat-0.1.3/src/lib.rs:83:50
[INFO] [stderr]    |
[INFO] [stderr] 83 |             .and_then(|mut vec| Ok(vec.drain(..).collect()))
[INFO] [stderr]    |                                                  ^^^^^^^ a collection of type `std::collections::HashSet<std::vec::Vec<u8>>` cannot be built from `std::iter::Iterator<Item=bytes::bytes::Bytes>`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::iter::FromIterator<bytes::bytes::Bytes>` is not implemented for `std::collections::HashSet<std::vec::Vec<u8>>`
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: a collection of type `std::vec::Vec<bytes::bytes::Bytes>` cannot be built from an iterator over elements of type `std::vec::Vec<u8>`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/korat-0.1.3/src/lib.rs:87:43
[INFO] [stderr]    |
[INFO] [stderr] 87 |         attribute_value!(bs, self.drain().collect())
[INFO] [stderr]    |                                           ^^^^^^^ a collection of type `std::vec::Vec<bytes::bytes::Bytes>` cannot be built from `std::iter::Iterator<Item=std::vec::Vec<u8>>`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::iter::FromIterator<std::vec::Vec<u8>>` is not implemented for `std::vec::Vec<bytes::bytes::Bytes>`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/korat-0.1.3/src/lib.rs:95:9
[INFO] [stderr]    |
[INFO] [stderr] 94 |     ) -> ConversionResult<Self> {
[INFO] [stderr]    |          ---------------------- expected `std::result::Result<std::vec::Vec<u8>, errors::ConversionError>` because of return type
[INFO] [stderr] 95 |         attribute_value.b.ok_or(ConversionError::MissingValue)
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected struct `std::vec::Vec`, found struct `bytes::bytes::Bytes`
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `std::result::Result<std::vec::Vec<u8>, _>`
[INFO] [stderr]               found type `std::result::Result<bytes::bytes::Bytes, _>`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/korat-0.1.3/src/lib.rs:99:29
[INFO] [stderr]    |
[INFO] [stderr] 99 |         attribute_value!(b, self)
[INFO] [stderr]    |                             ^^^^ expected struct `bytes::bytes::Bytes`, found struct `std::vec::Vec`
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `bytes::bytes::Bytes`
[INFO] [stderr]               found type `std::vec::Vec<u8>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0277, E0308, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0277`.
[INFO] [stderr] error: Could not compile `korat`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f262457b4ddc11c8e3c4a8009aec869897692c27edb6c870ec70ec26c52ffd2c"`
[INFO] running `"docker" "rm" "-f" "f262457b4ddc11c8e3c4a8009aec869897692c27edb6c870ec70ec26c52ffd2c"`
[INFO] [stdout] f262457b4ddc11c8e3c4a8009aec869897692c27edb6c870ec70ec26c52ffd2c