[INFO] crate taskpool 0.1.0 is already in cache
[INFO] extracting crate taskpool 0.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/taskpool/0.1.0
[INFO] extracting crate taskpool 0.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/taskpool/0.1.0
[INFO] validating manifest of taskpool-0.1.0 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 taskpool-0.1.0 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 taskpool-0.1.0
[INFO] finished frobbing taskpool-0.1.0
[INFO] frobbed toml for taskpool-0.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/taskpool/0.1.0/Cargo.toml
[INFO] started frobbing taskpool-0.1.0
[INFO] finished frobbing taskpool-0.1.0
[INFO] frobbed toml for taskpool-0.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/taskpool/0.1.0/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 taskpool-0.1.0 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/taskpool/0.1.0:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 9892a412baf0786327f5bb1117128e5be3d51f3cf49cdc931f851fa4c0760cf4
[INFO] running `"docker" "start" "-a" "9892a412baf0786327f5bb1117128e5be3d51f3cf49cdc931f851fa4c0760cf4"`
[INFO] [stderr]    Compiling taskpool v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error: expected one of `!`, `+`, `,`, `->`, `::`, or `>`, found `:`
[INFO] [stderr]   --> src/lib.rs:30:24
[INFO] [stderr]    |
[INFO] [stderr] 30 |     jobs: Sender<proc(): Send>,
[INFO] [stderr]    |                        ^ expected one of `!`, `+`, `,`, `->`, `::`, or `>` here
[INFO] [stderr] 
[INFO] [stderr] error: expected one of `!`, `+`, `,`, `->`, `::`, or `>`, found `:`
[INFO] [stderr]   --> src/lib.rs:37:48
[INFO] [stderr]    |
[INFO] [stderr] 37 |         let (job_tx, job_rx) = channel::<proc(): Send>();
[INFO] [stderr]    |                                                ^ expected one of `!`, `+`, `,`, `->`, `::`, or `>` here
[INFO] [stderr] 
[INFO] [stderr] error: expected one of `!`, `)`, `+`, `,`, `->`, or `::`, found `:`
[INFO] [stderr]   --> src/lib.rs:65:42
[INFO] [stderr]    |
[INFO] [stderr] 65 |     pub fn execute(&mut self, job: proc(): Send) {
[INFO] [stderr]    |                                          ^ expected one of `!`, `)`, `+`, `,`, `->`, or `::` here
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `taskpool`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "9892a412baf0786327f5bb1117128e5be3d51f3cf49cdc931f851fa4c0760cf4"`
[INFO] running `"docker" "rm" "-f" "9892a412baf0786327f5bb1117128e5be3d51f3cf49cdc931f851fa4c0760cf4"`
[INFO] [stdout] 9892a412baf0786327f5bb1117128e5be3d51f3cf49cdc931f851fa4c0760cf4