[INFO] crate chttp 0.5.3 is already in cache
[INFO] extracting crate chttp 0.5.3 into work/ex/beta-1.38-1/sources/1.37.0/reg/chttp/0.5.3
[INFO] extracting crate chttp 0.5.3 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/chttp/0.5.3
[INFO] validating manifest of chttp-0.5.3 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 chttp-0.5.3 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 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-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/reg/chttp/0.5.3/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 chttp-0.5.3 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/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 12980fc11f310c32a754a1bead381ab5f61b5060cfcb2f2cce200b9459026d10
[INFO] running `"docker" "start" "-a" "12980fc11f310c32a754a1bead381ab5f61b5060cfcb2f2cce200b9459026d10"`
[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 sluice v0.4.1
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.95s
[INFO] running `"docker" "inspect" "12980fc11f310c32a754a1bead381ab5f61b5060cfcb2f2cce200b9459026d10"`
[INFO] running `"docker" "rm" "-f" "12980fc11f310c32a754a1bead381ab5f61b5060cfcb2f2cce200b9459026d10"`
[INFO] [stdout] 12980fc11f310c32a754a1bead381ab5f61b5060cfcb2f2cce200b9459026d10
[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/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] d9ccf0c5321aa04055e6dddcccd5a7c65843241dbaf13e55d1a2a1d9ab013b7d
[INFO] running `"docker" "start" "-a" "d9ccf0c5321aa04055e6dddcccd5a7c65843241dbaf13e55d1a2a1d9ab013b7d"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling winapi v0.3.7
[INFO] [stderr]    Compiling futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling syn v0.14.9
[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 speculate v0.1.2
[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" "d9ccf0c5321aa04055e6dddcccd5a7c65843241dbaf13e55d1a2a1d9ab013b7d"`
[INFO] running `"docker" "rm" "-f" "d9ccf0c5321aa04055e6dddcccd5a7c65843241dbaf13e55d1a2a1d9ab013b7d"`
[INFO] [stdout] d9ccf0c5321aa04055e6dddcccd5a7c65843241dbaf13e55d1a2a1d9ab013b7d