[INFO] fetching crate mockiato 0.9.0...
[INFO] extracting crate mockiato 0.9.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/mockiato/0.9.0
[INFO] extracting crate mockiato 0.9.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/mockiato/0.9.0
[INFO] validating manifest of mockiato-0.9.0 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 mockiato-0.9.0 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 mockiato-0.9.0
[INFO] removed 1 missing examples
[INFO] finished frobbing mockiato-0.9.0
[INFO] frobbed toml for mockiato-0.9.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/mockiato/0.9.0/Cargo.toml
[INFO] started frobbing mockiato-0.9.0
[INFO] removed 1 missing examples
[INFO] finished frobbing mockiato-0.9.0
[INFO] frobbed toml for mockiato-0.9.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/mockiato/0.9.0/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] 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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mockiato-codegen v0.9.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing mockiato-0.9.0 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-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/mockiato/0.9.0:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 9c5bebb1ac04a902efb00bf43bf60506d36875da0b15fb63d9a523e1b11ef89a
[INFO] running `"docker" "start" "-a" "9c5bebb1ac04a902efb00bf43bf60506d36875da0b15fb63d9a523e1b11ef89a"`
[INFO] [stderr]    Compiling syn v0.15.42
[INFO] [stderr]    Compiling nameof v1.1.0
[INFO] [stderr]    Compiling nearly_eq v0.2.4
[INFO] [stderr]    Compiling mockiato-codegen v0.9.0
[INFO] [stderr]    Compiling mockiato v0.9.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.52s
[INFO] running `"docker" "inspect" "9c5bebb1ac04a902efb00bf43bf60506d36875da0b15fb63d9a523e1b11ef89a"`
[INFO] running `"docker" "rm" "-f" "9c5bebb1ac04a902efb00bf43bf60506d36875da0b15fb63d9a523e1b11ef89a"`
[INFO] [stdout] 9c5bebb1ac04a902efb00bf43bf60506d36875da0b15fb63d9a523e1b11ef89a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/mockiato/0.9.0:/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] aeb7ea9282828b84b8b7fbb47be2354f12a04521ed2253359fb4b4a984b13283
[INFO] running `"docker" "start" "-a" "aeb7ea9282828b84b8b7fbb47be2354f12a04521ed2253359fb4b4a984b13283"`
[INFO] [stderr]    Compiling mockiato v0.9.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0601]: `main` function not found in crate `downcasting`
[INFO] [stderr]   |
[INFO] [stderr]   = note: consider adding a `main` function to `examples/downcasting.rs`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[INFO] [stderr] error: Could not compile `mockiato`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "aeb7ea9282828b84b8b7fbb47be2354f12a04521ed2253359fb4b4a984b13283"`
[INFO] running `"docker" "rm" "-f" "aeb7ea9282828b84b8b7fbb47be2354f12a04521ed2253359fb4b4a984b13283"`
[INFO] [stdout] aeb7ea9282828b84b8b7fbb47be2354f12a04521ed2253359fb4b4a984b13283