[INFO] updating cached repository robroyx3m/D7018_Task4
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/robroyx3m/D7018_Task4
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/robroyx3m/D7018_Task4" "work/ex/beta-1.38-1/sources/1.37.0/gh/robroyx3m/D7018_Task4"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/robroyx3m/D7018_Task4'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/robroyx3m/D7018_Task4" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/robroyx3m/D7018_Task4"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/robroyx3m/D7018_Task4'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 06063dc86cf2df5b88aa7a22835a418c428d6179
[INFO] sha for GitHub repo robroyx3m/D7018_Task4: 06063dc86cf2df5b88aa7a22835a418c428d6179
[INFO] validating manifest of robroyx3m/D7018_Task4 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 robroyx3m/D7018_Task4 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 robroyx3m/D7018_Task4
[INFO] finished frobbing robroyx3m/D7018_Task4
[INFO] frobbed toml for robroyx3m/D7018_Task4 written to work/ex/beta-1.38-1/sources/1.37.0/gh/robroyx3m/D7018_Task4/Cargo.toml
[INFO] started frobbing robroyx3m/D7018_Task4
[INFO] finished frobbing robroyx3m/D7018_Task4
[INFO] frobbed toml for robroyx3m/D7018_Task4 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/robroyx3m/D7018_Task4/Cargo.toml
[INFO] crate robroyx3m/D7018_Task4 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 robroyx3m/D7018_Task4 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/robroyx3m/D7018_Task4:/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] 2cd5b2b24e0f7af58b88e0aaaf39159dbdc7bb0e69de57bff21c70f69fb3757a
[INFO] running `"docker" "start" "-a" "2cd5b2b24e0f7af58b88e0aaaf39159dbdc7bb0e69de57bff21c70f69fb3757a"`
[INFO] [stderr]    Compiling vcell v0.1.0
[INFO] [stderr]    Compiling cortex-m v0.3.1
[INFO] [stderr]    Compiling bare-metal v0.1.1
[INFO] [stderr]    Compiling aligned v0.1.1
[INFO] [stderr]    Compiling cortex-m-rt v0.3.7
[INFO] [stderr]    Compiling r0 v0.2.2
[INFO] [stderr]    Compiling cortex-m-semihosting v0.2.0
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/aligned-0.1.1/src/lib.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 | #![feature(const_fn)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/bare-metal-0.1.1/src/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(const_fn,const_unsafe_cell_new)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/cortex-m-semihosting-0.2.0/src/lib.rs:106:1
[INFO] [stderr]     |
[INFO] [stderr] 106 | #![feature(asm)]
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr]    Compiling volatile-register v0.2.0
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `bare-metal`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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 `cortex-m-semihosting`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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 `aligned`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "2cd5b2b24e0f7af58b88e0aaaf39159dbdc7bb0e69de57bff21c70f69fb3757a"`
[INFO] running `"docker" "rm" "-f" "2cd5b2b24e0f7af58b88e0aaaf39159dbdc7bb0e69de57bff21c70f69fb3757a"`
[INFO] [stdout] 2cd5b2b24e0f7af58b88e0aaaf39159dbdc7bb0e69de57bff21c70f69fb3757a