[INFO] updating cached repository camjackson/rusteroids
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/camjackson/rusteroids
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/camjackson/rusteroids" "work/ex/beta-1.38-1/sources/1.37.0/gh/camjackson/rusteroids"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/camjackson/rusteroids'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/camjackson/rusteroids" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/camjackson/rusteroids"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/camjackson/rusteroids'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e7fad01b5340fd6d16a53ac21d715433a27eefe9
[INFO] sha for GitHub repo camjackson/rusteroids: e7fad01b5340fd6d16a53ac21d715433a27eefe9
[INFO] validating manifest of camjackson/rusteroids 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 camjackson/rusteroids 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 camjackson/rusteroids
[INFO] finished frobbing camjackson/rusteroids
[INFO] frobbed toml for camjackson/rusteroids written to work/ex/beta-1.38-1/sources/1.37.0/gh/camjackson/rusteroids/Cargo.toml
[INFO] started frobbing camjackson/rusteroids
[INFO] finished frobbing camjackson/rusteroids
[INFO] frobbed toml for camjackson/rusteroids written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/camjackson/rusteroids/Cargo.toml
[INFO] crate camjackson/rusteroids 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]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing camjackson/rusteroids 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/camjackson/rusteroids:/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] 8ba4bea32e1a8874a890587aa53391297323546df9c3befd32e72686473ec6f9
[INFO] running `"docker" "start" "-a" "8ba4bea32e1a8874a890587aa53391297323546df9c3befd32e72686473ec6f9"`
[INFO] [stderr]    Compiling primal-estimate v0.2.1
[INFO] [stderr]    Compiling ordermap v0.3.4
[INFO] [stderr]    Compiling allocators v0.1.0 (https://github.com/citybound/citybound#824b389b)
[INFO] [stderr]    Compiling rand v0.3.19
[INFO] [stderr]    Compiling shared_library v0.1.8
[INFO] [stderr]    Compiling primal-bit v0.2.4
[INFO] [stderr]    Compiling imgui-sys v0.0.15
[INFO] [stderr]    Compiling itertools v0.7.4
[INFO] [stderr]    Compiling primal-check v0.2.3
[INFO] [stderr]    Compiling gl_generator v0.5.5
[INFO] [stderr]    Compiling generic-array v0.8.3
[INFO] [stderr]    Compiling chunky v0.1.0 (https://github.com/citybound/citybound#824b389b)
[INFO] [stderr]    Compiling x11-dl v2.17.2
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/git/checkouts/citybound-01a382b1dd62b125/824b389/engine/chunky/src/lib.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | #![feature(vec_resize_default)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/git/checkouts/citybound-01a382b1dd62b125/824b389/engine/chunky/src/lib.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | #![feature(conservative_impl_trait)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling compact_macros v0.1.0 (https://github.com/citybound/citybound#824b389b)
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `chunky`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "8ba4bea32e1a8874a890587aa53391297323546df9c3befd32e72686473ec6f9"`
[INFO] running `"docker" "rm" "-f" "8ba4bea32e1a8874a890587aa53391297323546df9c3befd32e72686473ec6f9"`
[INFO] [stdout] 8ba4bea32e1a8874a890587aa53391297323546df9c3befd32e72686473ec6f9