[INFO] updating cached repository IsaacWoods/teensy_kbd
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/IsaacWoods/teensy_kbd
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/IsaacWoods/teensy_kbd" "work/ex/beta-1.38-1/sources/1.37.0/gh/IsaacWoods/teensy_kbd"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/IsaacWoods/teensy_kbd'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/IsaacWoods/teensy_kbd" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/IsaacWoods/teensy_kbd"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/IsaacWoods/teensy_kbd'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c7fc064d791e54c2f45e2909b87e7eac250aa470
[INFO] sha for GitHub repo IsaacWoods/teensy_kbd: c7fc064d791e54c2f45e2909b87e7eac250aa470
[INFO] validating manifest of IsaacWoods/teensy_kbd 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 IsaacWoods/teensy_kbd 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 IsaacWoods/teensy_kbd
[INFO] finished frobbing IsaacWoods/teensy_kbd
[INFO] frobbed toml for IsaacWoods/teensy_kbd written to work/ex/beta-1.38-1/sources/1.37.0/gh/IsaacWoods/teensy_kbd/Cargo.toml
[INFO] started frobbing IsaacWoods/teensy_kbd
[INFO] finished frobbing IsaacWoods/teensy_kbd
[INFO] frobbed toml for IsaacWoods/teensy_kbd written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/IsaacWoods/teensy_kbd/Cargo.toml
[INFO] crate IsaacWoods/teensy_kbd 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 IsaacWoods/teensy_kbd 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/IsaacWoods/teensy_kbd:/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] 6997a99a607a05f146c8601cb01c0356d3513e5b3213b963ab140a090129d0b0
[INFO] running `"docker" "start" "-a" "6997a99a607a05f146c8601cb01c0356d3513e5b3213b963ab140a090129d0b0"`
[INFO] [stderr]    Compiling volatile v0.2.4
[INFO] [stderr]    Compiling bit_field v0.9.0
[INFO] [stderr]    Compiling teensy_kbd v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(lang_items, asm, const_fn, decl_macro)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: language item required, but not found: `eh_personality`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/main.rs:71:70
[INFO] [stderr]    |
[INFO] [stderr] 71 | pub static _VECTORS: [unsafe extern "C" fn() -> !; 2] = [_stack_top, main];
[INFO] [stderr]    |                                                                      ^^^^ expected fn pointer, found fn item
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `unsafe extern "C" fn() -> !`
[INFO] [stderr]               found type `extern "C" fn() {main}`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 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 `teensy_kbd`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "6997a99a607a05f146c8601cb01c0356d3513e5b3213b963ab140a090129d0b0"`
[INFO] running `"docker" "rm" "-f" "6997a99a607a05f146c8601cb01c0356d3513e5b3213b963ab140a090129d0b0"`
[INFO] [stdout] 6997a99a607a05f146c8601cb01c0356d3513e5b3213b963ab140a090129d0b0