[INFO] updating cached repository https://github.com/ShaunKarran/stm32f411e-rust-blinky
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cdf4075ec569e828bbc6b74fc3ace7806816cb93
[INFO] testing ShaunKarran/stm32f411e-rust-blinky against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FShaunKarran%2Fstm32f411e-rust-blinky" "work/builds/worker-4/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ShaunKarran/stm32f411e-rust-blinky on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/ShaunKarran/stm32f411e-rust-blinky
[INFO] finished tweaking git repo https://github.com/ShaunKarran/stm32f411e-rust-blinky
[INFO] tweaked toml for git repo https://github.com/ShaunKarran/stm32f411e-rust-blinky written to work/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/ShaunKarran/stm32f411e-rust-blinky already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 3939d4a3e86470f3e485b75dcc9c2d4885b07f8a07ebd21ec3ea9ee0776ce5f4
[INFO] running `"docker" "start" "-a" "3939d4a3e86470f3e485b75dcc9c2d4885b07f8a07ebd21ec3ea9ee0776ce5f4"`
[INFO] [stderr]    Compiling volatile-register v0.1.2
[INFO] [stderr]    Compiling rlibc v1.0.0
[INFO] [stderr]    Compiling stm32f411e-disco v0.1.0 (https://github.com/ShaunKarran/stm32f411e-disco#1f0d9dd0)
[INFO] [stderr]    Compiling r0 v0.1.0
[INFO] [stderr]    Compiling stm32f411xx-memory-map v0.1.0 (https://github.com/NathanielPerkins/stm32f411xx-memory-map#ca13d547)
[INFO] [stderr]    Compiling cortex-m v0.1.5
[INFO] [stderr]    Compiling compiler-builtins-snapshot v0.0.20161008+c56faf22abb39724008148d58f12bcd43b6d236b
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cortex-m-0.1.5/src/lib.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | #![feature(asm)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cortex-m-0.1.5/src/lib.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | #![feature(const_fn)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/compiler-builtins-snapshot-0.0.20161008+c56faf22abb39724008148d58f12bcd43b6d236b/src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(asm)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/compiler-builtins-snapshot-0.0.20161008+c56faf22abb39724008148d58f12bcd43b6d236b/src/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(core_intrinsics)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/compiler-builtins-snapshot-0.0.20161008+c56faf22abb39724008148d58f12bcd43b6d236b/src/lib.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | #![feature(linkage)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/compiler-builtins-snapshot-0.0.20161008+c56faf22abb39724008148d58f12bcd43b6d236b/src/lib.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | #![feature(naked_functions)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[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 `cortex-m`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `compiler-builtins-snapshot`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "3939d4a3e86470f3e485b75dcc9c2d4885b07f8a07ebd21ec3ea9ee0776ce5f4"`
[INFO] running `"docker" "rm" "-f" "3939d4a3e86470f3e485b75dcc9c2d4885b07f8a07ebd21ec3ea9ee0776ce5f4"`
[INFO] [stdout] 3939d4a3e86470f3e485b75dcc9c2d4885b07f8a07ebd21ec3ea9ee0776ce5f4