[INFO] updating cached repository stevebob/platform-game-experiment
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/stevebob/platform-game-experiment
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/stevebob/platform-game-experiment" "work/ex/beta-1.38-1/sources/1.37.0/gh/stevebob/platform-game-experiment"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/stevebob/platform-game-experiment'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/stevebob/platform-game-experiment" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/stevebob/platform-game-experiment"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/stevebob/platform-game-experiment'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b182295c312d212b39a6e090c3221e6364a0145a
[INFO] sha for GitHub repo stevebob/platform-game-experiment: b182295c312d212b39a6e090c3221e6364a0145a
[INFO] validating manifest of stevebob/platform-game-experiment 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 stevebob/platform-game-experiment 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 stevebob/platform-game-experiment
[INFO] finished frobbing stevebob/platform-game-experiment
[INFO] frobbed toml for stevebob/platform-game-experiment written to work/ex/beta-1.38-1/sources/1.37.0/gh/stevebob/platform-game-experiment/Cargo.toml
[INFO] started frobbing stevebob/platform-game-experiment
[INFO] finished frobbing stevebob/platform-game-experiment
[INFO] frobbed toml for stevebob/platform-game-experiment written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/stevebob/platform-game-experiment/Cargo.toml
[INFO] crate stevebob/platform-game-experiment 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 stevebob/platform-game-experiment 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-6/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/stevebob/platform-game-experiment:/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] 461be4b54451aeb296363d0fcd3b71b8aa8672c2b71e75525dc0d56ad1c888c8
[INFO] running `"docker" "start" "-a" "461be4b54451aeb296363d0fcd3b71b8aa8672c2b71e75525dc0d56ad1c888c8"`
[INFO] [stderr]    Compiling num-bigint v0.2.0
[INFO] [stderr]    Compiling num-complex v0.2.0
[INFO] [stderr]    Compiling gl_generator v0.9.0
[INFO] [stderr]    Compiling gfx_core v0.8.2
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling best v0.6.0
[INFO] [stderr]    Compiling winit v0.13.1
[INFO] [stderr]    Compiling gfx_gl v0.5.0
[INFO] [stderr]    Compiling glutin v0.15.0
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling gfx_device_gl v0.15.3
[INFO] [stderr]    Compiling gfx v0.17.1
[INFO] [stderr]    Compiling gfx_window_glutin v0.23.0
[INFO] [stderr]    Compiling platform-game-experiment v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(nonzero)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `platform-game-experiment`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "461be4b54451aeb296363d0fcd3b71b8aa8672c2b71e75525dc0d56ad1c888c8"`
[INFO] running `"docker" "rm" "-f" "461be4b54451aeb296363d0fcd3b71b8aa8672c2b71e75525dc0d56ad1c888c8"`
[INFO] [stdout] 461be4b54451aeb296363d0fcd3b71b8aa8672c2b71e75525dc0d56ad1c888c8