[INFO] updating cached repository ifydev/Zircon
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ifydev/Zircon
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ifydev/Zircon" "work/ex/beta-1.38-1/sources/1.37.0/gh/ifydev/Zircon"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ifydev/Zircon'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ifydev/Zircon" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ifydev/Zircon"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ifydev/Zircon'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5f84b42876e943e9d5eccba77b8e1d69fd7ef7e8
[INFO] sha for GitHub repo ifydev/Zircon: 5f84b42876e943e9d5eccba77b8e1d69fd7ef7e8
[INFO] validating manifest of ifydev/Zircon 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 ifydev/Zircon 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 ifydev/Zircon
[INFO] finished frobbing ifydev/Zircon
[INFO] frobbed toml for ifydev/Zircon written to work/ex/beta-1.38-1/sources/1.37.0/gh/ifydev/Zircon/Cargo.toml
[INFO] started frobbing ifydev/Zircon
[INFO] finished frobbing ifydev/Zircon
[INFO] frobbed toml for ifydev/Zircon written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ifydev/Zircon/Cargo.toml
[INFO] crate ifydev/Zircon 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 ifydev/Zircon 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ifydev/Zircon:/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] c40c178c64e311c54a3c3b20758a6ce24ee6acda7bbf9b757ee58b791124cb38
[INFO] running `"docker" "start" "-a" "c40c178c64e311c54a3c3b20758a6ce24ee6acda7bbf9b757ee58b791124cb38"`
[INFO] [stderr]    Compiling zircon v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error: expected one of `,`, `=`, or `}`, found `/// 0x08`
[INFO] [stderr]   --> src/protocol/packet.rs:55:2
[INFO] [stderr]    |
[INFO] [stderr] 54 |     OfflineConnectionRequest2(u8, i64, String, i16, i8)
[INFO] [stderr]    |                                                        - expected one of `,`, `=`, or `}` here
[INFO] [stderr] 55 |     /// 0x08
[INFO] [stderr]    |     ^^^^^^^^ unexpected token
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `zircon`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "c40c178c64e311c54a3c3b20758a6ce24ee6acda7bbf9b757ee58b791124cb38"`
[INFO] running `"docker" "rm" "-f" "c40c178c64e311c54a3c3b20758a6ce24ee6acda7bbf9b757ee58b791124cb38"`
[INFO] [stdout] c40c178c64e311c54a3c3b20758a6ce24ee6acda7bbf9b757ee58b791124cb38