[INFO] crate pact_consumer 0.4.0 is already in cache
[INFO] extracting crate pact_consumer 0.4.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/pact_consumer/0.4.0
[INFO] extracting crate pact_consumer 0.4.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/pact_consumer/0.4.0
[INFO] validating manifest of pact_consumer-0.4.0 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 pact_consumer-0.4.0 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 pact_consumer-0.4.0
[INFO] finished frobbing pact_consumer-0.4.0
[INFO] frobbed toml for pact_consumer-0.4.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/pact_consumer/0.4.0/Cargo.toml
[INFO] started frobbing pact_consumer-0.4.0
[INFO] finished frobbing pact_consumer-0.4.0
[INFO] frobbed toml for pact_consumer-0.4.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/pact_consumer/0.4.0/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 pact_consumer-0.4.0 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/pact_consumer/0.4.0:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] f17ef4810bd7cf5e868837f0a68be974c526a11cbfd521625763369404d9a0a6
[INFO] running `"docker" "start" "-a" "f17ef4810bd7cf5e868837f0a68be974c526a11cbfd521625763369404d9a0a6"`
[INFO] [stderr]    Compiling itertools v0.5.10
[INFO] [stderr]    Compiling chrono-tz v0.4.1
[INFO] [stderr]    Compiling pact_matching v0.5.3
[INFO] [stderr]    Compiling pact_mock_server v0.4.1
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/pact_mock_server-0.4.1/src/lib.rs:338:18
[INFO] [stderr]     |
[INFO] [stderr] 338 |         headers: extract_headers(&req.headers),
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected struct `std::vec::Vec`, found struct `std::string::String`
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected type `std::option::Option<std::collections::HashMap<_, std::vec::Vec<std::string::String>>>`
[INFO] [stderr]                found type `std::option::Option<std::collections::HashMap<_, std::string::String>>`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `into_bytes` found for type `std::vec::Vec<std::string::String>` in the current scope
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/pact_mock_server-0.4.1/src/lib.rs:417:77
[INFO] [stderr]     |
[INFO] [stderr] 417 |                                         res.headers_mut().set_raw(k, vec![v.into_bytes()]);
[INFO] [stderr]     |                                                                             ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0308, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0308`.
[INFO] [stderr] error: Could not compile `pact_mock_server`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f17ef4810bd7cf5e868837f0a68be974c526a11cbfd521625763369404d9a0a6"`
[INFO] running `"docker" "rm" "-f" "f17ef4810bd7cf5e868837f0a68be974c526a11cbfd521625763369404d9a0a6"`
[INFO] [stdout] f17ef4810bd7cf5e868837f0a68be974c526a11cbfd521625763369404d9a0a6