[INFO] updating cached repository gterzian/workflow_executor
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/gterzian/workflow_executor
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/gterzian/workflow_executor" "work/ex/beta-1.38-1/sources/1.37.0/gh/gterzian/workflow_executor"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/gterzian/workflow_executor'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/gterzian/workflow_executor" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gterzian/workflow_executor"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gterzian/workflow_executor'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d0ce8e2068ae16b118de72d48794887fe454ee6d
[INFO] sha for GitHub repo gterzian/workflow_executor: d0ce8e2068ae16b118de72d48794887fe454ee6d
[INFO] validating manifest of gterzian/workflow_executor 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 gterzian/workflow_executor 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 gterzian/workflow_executor
[INFO] finished frobbing gterzian/workflow_executor
[INFO] frobbed toml for gterzian/workflow_executor written to work/ex/beta-1.38-1/sources/1.37.0/gh/gterzian/workflow_executor/Cargo.toml
[INFO] started frobbing gterzian/workflow_executor
[INFO] finished frobbing gterzian/workflow_executor
[INFO] frobbed toml for gterzian/workflow_executor written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gterzian/workflow_executor/Cargo.toml
[INFO] crate gterzian/workflow_executor already has a lockfile, it will not be regenerated
[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 gterzian/workflow_executor 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/gterzian/workflow_executor:/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] 209d965281a8769ed21dc4fcb16e9edd09db3b549ce7e341c42b1a1c91b9a859
[INFO] running `"docker" "start" "-a" "209d965281a8769ed21dc4fcb16e9edd09db3b549ce7e341c42b1a1c91b9a859"`
[INFO] [stderr]    Compiling workflow v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `std::sync::mpsc::Select`
[INFO] [stderr]  --> src/main.rs:5:23
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::sync::mpsc::{Select, Sender, Receiver, channel};
[INFO] [stderr]   |                       ^^^^^^ no `Select` in `sync::mpsc`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(mpsc_select)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0601]: `main` function not found in crate `workflow`
[INFO] [stderr]   |
[INFO] [stderr]   = note: consider adding a `main` function to `src/main.rs`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554, E0601.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `workflow`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "209d965281a8769ed21dc4fcb16e9edd09db3b549ce7e341c42b1a1c91b9a859"`
[INFO] running `"docker" "rm" "-f" "209d965281a8769ed21dc4fcb16e9edd09db3b549ce7e341c42b1a1c91b9a859"`
[INFO] [stdout] 209d965281a8769ed21dc4fcb16e9edd09db3b549ce7e341c42b1a1c91b9a859