[INFO] crate oxcc-stm32f767-hal 0.2.0 is already in cache
[INFO] extracting crate oxcc-stm32f767-hal 0.2.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/oxcc-stm32f767-hal/0.2.0
[INFO] extracting crate oxcc-stm32f767-hal 0.2.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/oxcc-stm32f767-hal/0.2.0
[INFO] validating manifest of oxcc-stm32f767-hal-0.2.0 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 oxcc-stm32f767-hal-0.2.0 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 oxcc-stm32f767-hal-0.2.0
[INFO] finished frobbing oxcc-stm32f767-hal-0.2.0
[INFO] frobbed toml for oxcc-stm32f767-hal-0.2.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/oxcc-stm32f767-hal/0.2.0/Cargo.toml
[INFO] started frobbing oxcc-stm32f767-hal-0.2.0
[INFO] finished frobbing oxcc-stm32f767-hal-0.2.0
[INFO] frobbed toml for oxcc-stm32f767-hal-0.2.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/oxcc-stm32f767-hal/0.2.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing oxcc-stm32f767-hal-0.2.0 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-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/oxcc-stm32f767-hal/0.2.0:/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] 93229a8cb78e5139fdf39da00e68346d7da07da96639ff7f3cbfa88c780a02a5
[INFO] running `"docker" "start" "-a" "93229a8cb78e5139fdf39da00e68346d7da07da96639ff7f3cbfa88c780a02a5"`
[INFO] [stderr]    Compiling stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling cortex-m v0.6.1
[INFO] [stderr]    Compiling vcell v0.1.0
[INFO] [stderr]    Compiling cortex-m v0.5.10
[INFO] [stderr]    Compiling cortex-m-rt v0.6.10
[INFO] [stderr]    Compiling oxcc-stm32f767 v0.1.0
[INFO] [stderr]    Compiling aligned v0.2.0
[INFO] [stderr]    Compiling r0 v0.2.2
[INFO] [stderr]    Compiling embedded_types v0.3.2
[INFO] [stderr]    Compiling volatile-register v0.2.0
[INFO] [stderr]    Compiling bare-metal v0.2.4
[INFO] [stderr]    Compiling as-slice v0.1.0
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.1.5
[INFO] [stderr]    Compiling aligned v0.3.1
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/oxcc-stm32f767-0.1.0/src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(const_fn)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/oxcc-stm32f767-0.1.0/src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(try_from)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/oxcc-stm32f767-0.1.0/src/lib.rs:5:29
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![cfg_attr(feature = "rt", feature(global_asm))]
[INFO] [stderr]   |                             ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/oxcc-stm32f767-0.1.0/src/lib.rs:6:29
[INFO] [stderr]   |
[INFO] [stderr] 6 | #![cfg_attr(feature = "rt", feature(use_extern_macros))]
[INFO] [stderr]   |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/oxcc-stm32f767-0.1.0/src/lib.rs:7:29
[INFO] [stderr]   |
[INFO] [stderr] 7 | #![cfg_attr(feature = "rt", feature(used))]
[INFO] [stderr]   |                             ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `oxcc-stm32f767`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "93229a8cb78e5139fdf39da00e68346d7da07da96639ff7f3cbfa88c780a02a5"`
[INFO] running `"docker" "rm" "-f" "93229a8cb78e5139fdf39da00e68346d7da07da96639ff7f3cbfa88c780a02a5"`
[INFO] [stdout] 93229a8cb78e5139fdf39da00e68346d7da07da96639ff7f3cbfa88c780a02a5