[INFO] updating cached repository polyfractal/Turbine
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/polyfractal/Turbine
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/polyfractal/Turbine" "work/ex/beta-1.38-1/sources/1.37.0/gh/polyfractal/Turbine"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/polyfractal/Turbine'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/polyfractal/Turbine" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/polyfractal/Turbine"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/polyfractal/Turbine'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d5c837956f4dfad7f4478cc02a2bafd98c77be14
[INFO] sha for GitHub repo polyfractal/Turbine: d5c837956f4dfad7f4478cc02a2bafd98c77be14
[INFO] validating manifest of polyfractal/Turbine 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 polyfractal/Turbine 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 polyfractal/Turbine
[INFO] finished frobbing polyfractal/Turbine
[INFO] frobbed toml for polyfractal/Turbine written to work/ex/beta-1.38-1/sources/1.37.0/gh/polyfractal/Turbine/Cargo.toml
[INFO] started frobbing polyfractal/Turbine
[INFO] finished frobbing polyfractal/Turbine
[INFO] frobbed toml for polyfractal/Turbine written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/polyfractal/Turbine/Cargo.toml
[INFO] crate polyfractal/Turbine 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] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/polyfractal/Turbine/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[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 polyfractal/Turbine 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/gh/polyfractal/Turbine:/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] 3a3d3c3db8c92bf3a9b0f02ff713812939ac8cf69184d2a9566d53e23c48b8f4
[INFO] running `"docker" "start" "-a" "3a3d3c3db8c92bf3a9b0f02ff713812939ac8cf69184d2a9566d53e23c48b8f4"`
[INFO] [stderr]    Compiling turbine v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(ptr_as_ref)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | #![feature(convert)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | #![feature(core_intrinsics)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> src/lib.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | #![feature(libc)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> src/atomicnum.rs:183:30
[INFO] [stderr]     |
[INFO] [stderr] 181 | unsafe fn atomic_compare_and_swap<T>(dst: *mut T, old:T, new:T, order: Ordering) -> T {
[INFO] [stderr]     |                                                                                     - expected `T` because of return type
[INFO] [stderr] 182 |     match order {
[INFO] [stderr] 183 |         Ordering::Acquire => intrinsics::atomic_cxchg_acq(dst, old, new),
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected type parameter, found tuple
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected type `T`
[INFO] [stderr]                found type `(T, bool)`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0308, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0308`.
[INFO] [stderr] error: Could not compile `turbine`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "3a3d3c3db8c92bf3a9b0f02ff713812939ac8cf69184d2a9566d53e23c48b8f4"`
[INFO] running `"docker" "rm" "-f" "3a3d3c3db8c92bf3a9b0f02ff713812939ac8cf69184d2a9566d53e23c48b8f4"`
[INFO] [stdout] 3a3d3c3db8c92bf3a9b0f02ff713812939ac8cf69184d2a9566d53e23c48b8f4