[INFO] updating cached repository jswrenn/midiplex
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jswrenn/midiplex
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jswrenn/midiplex" "work/ex/beta-1.37-6/sources/1.36.0/gh/jswrenn/midiplex"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/jswrenn/midiplex'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jswrenn/midiplex" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jswrenn/midiplex"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jswrenn/midiplex'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ce9f509489dc620a778cc74f0a87f00b64aee7f6
[INFO] sha for GitHub repo jswrenn/midiplex: ce9f509489dc620a778cc74f0a87f00b64aee7f6
[INFO] validating manifest of jswrenn/midiplex 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 jswrenn/midiplex 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 jswrenn/midiplex
[INFO] finished frobbing jswrenn/midiplex
[INFO] frobbed toml for jswrenn/midiplex written to work/ex/beta-1.37-6/sources/1.36.0/gh/jswrenn/midiplex/Cargo.toml
[INFO] started frobbing jswrenn/midiplex
[INFO] finished frobbing jswrenn/midiplex
[INFO] frobbed toml for jswrenn/midiplex written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jswrenn/midiplex/Cargo.toml
[INFO] crate jswrenn/midiplex already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing jswrenn/midiplex 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-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jswrenn/midiplex:/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] 4ca743719a5fa9ae9650752c19b275b7e60b9f6e5d888876b55f76e67645fcf5
[INFO] running `"docker" "start" "-a" "4ca743719a5fa9ae9650752c19b275b7e60b9f6e5d888876b55f76e67645fcf5"`
[INFO] [stderr]    Compiling syn v0.13.1
[INFO] [stderr]    Compiling alsa v0.2.0
[INFO] [stderr]    Compiling structopt-derive v0.2.7
[INFO] [stderr]    Compiling structopt v0.2.7
[INFO] [stderr]    Compiling midiplex v0.6.2 (/opt/crater/workdir)
[INFO] [stderr] error[E0463]: can't find crate for `alloc_system`
[INFO] [stderr]  --> src/main.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | extern crate alloc_system;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0463`.
[INFO] [stderr] error: Could not compile `midiplex`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "4ca743719a5fa9ae9650752c19b275b7e60b9f6e5d888876b55f76e67645fcf5"`
[INFO] running `"docker" "rm" "-f" "4ca743719a5fa9ae9650752c19b275b7e60b9f6e5d888876b55f76e67645fcf5"`
[INFO] [stdout] 4ca743719a5fa9ae9650752c19b275b7e60b9f6e5d888876b55f76e67645fcf5