[INFO] fetching crate chttp 0.5.3...
[INFO] extracting crate chttp 0.5.3 into work/ex/beta-1.37-6/sources/1.36.0/reg/chttp/0.5.3
[INFO] extracting crate chttp 0.5.3 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/chttp/0.5.3
[INFO] validating manifest of chttp-0.5.3 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 chttp-0.5.3 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 chttp-0.5.3
[INFO] removed 1 missing examples
[INFO] finished frobbing chttp-0.5.3
[INFO] frobbed toml for chttp-0.5.3 written to work/ex/beta-1.37-6/sources/1.36.0/reg/chttp/0.5.3/Cargo.toml
[INFO] started frobbing chttp-0.5.3
[INFO] removed 1 missing examples
[INFO] finished frobbing chttp-0.5.3
[INFO] frobbed toml for chttp-0.5.3 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/chttp/0.5.3/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 sluice v0.4.1
[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] testing chttp-0.5.3 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-1/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/chttp/0.5.3:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] b6446dda5343ec16f4d91bb57d94e581eb30a45a851f92aba6579988f62d5186
[INFO] running `"docker" "start" "-a" "b6446dda5343ec16f4d91bb57d94e581eb30a45a851f92aba6579988f62d5186"`
[INFO] [stderr]    Compiling futures-core-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling curl v0.4.22
[INFO] [stderr]    Compiling chttp v0.5.3 (/opt/crater/workdir)
[INFO] [stderr]    Compiling futures-io-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling curl-sys v0.4.20
[INFO] [stderr]    Compiling futures-sink-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-channel-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling sluice v0.4.1
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.90s
[INFO] running `"docker" "inspect" "b6446dda5343ec16f4d91bb57d94e581eb30a45a851f92aba6579988f62d5186"`
[INFO] running `"docker" "rm" "-f" "b6446dda5343ec16f4d91bb57d94e581eb30a45a851f92aba6579988f62d5186"`
[INFO] [stdout] b6446dda5343ec16f4d91bb57d94e581eb30a45a851f92aba6579988f62d5186
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/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/chttp/0.5.3:/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 1f4d6355cd75f4094bb8dd634b159e6ffbc6f269954124b7d0826cc6ddc0073f
[INFO] running `"docker" "start" "-a" "1f4d6355cd75f4094bb8dd634b159e6ffbc6f269954124b7d0826cc6ddc0073f"`
[INFO] [stderr]    Compiling winapi v0.3.7
[INFO] [stderr]    Compiling futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling winconsole v0.10.0
[INFO] [stderr]    Compiling colored v1.8.0
[INFO] [stderr]    Compiling mockito v0.19.0
[INFO] [stderr]    Compiling chttp v0.5.3 (/opt/crater/workdir)
[INFO] [stderr] error[E0601]: `main` function not found in crate `async`
[INFO] [stderr]   |
[INFO] [stderr]   = note: consider adding a `main` function to `examples/async.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 `chttp`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "1f4d6355cd75f4094bb8dd634b159e6ffbc6f269954124b7d0826cc6ddc0073f"`
[INFO] running `"docker" "rm" "-f" "1f4d6355cd75f4094bb8dd634b159e6ffbc6f269954124b7d0826cc6ddc0073f"`
[INFO] [stdout] 1f4d6355cd75f4094bb8dd634b159e6ffbc6f269954124b7d0826cc6ddc0073f