[INFO] updating cached repository jchapman127/uni-project-svm
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jchapman127/uni-project-svm
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jchapman127/uni-project-svm" "work/ex/beta-1.38-1/sources/1.37.0/gh/jchapman127/uni-project-svm"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/jchapman127/uni-project-svm'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jchapman127/uni-project-svm" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jchapman127/uni-project-svm"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jchapman127/uni-project-svm'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9485de959ab4d232d7fc45e3ca104db257833636
[INFO] sha for GitHub repo jchapman127/uni-project-svm: 9485de959ab4d232d7fc45e3ca104db257833636
[INFO] validating manifest of jchapman127/uni-project-svm 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 jchapman127/uni-project-svm 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 jchapman127/uni-project-svm
[INFO] finished frobbing jchapman127/uni-project-svm
[INFO] frobbed toml for jchapman127/uni-project-svm written to work/ex/beta-1.38-1/sources/1.37.0/gh/jchapman127/uni-project-svm/Cargo.toml
[INFO] started frobbing jchapman127/uni-project-svm
[INFO] finished frobbing jchapman127/uni-project-svm
[INFO] frobbed toml for jchapman127/uni-project-svm written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jchapman127/uni-project-svm/Cargo.toml
[INFO] crate jchapman127/uni-project-svm 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] [stderr]     Blocking waiting for file lock on package cache
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing jchapman127/uni-project-svm 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/jchapman127/uni-project-svm:/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] a248fd28a02c321479d4aa2cf5b554dd807f0ff4ff47091b84c704c901abe24c
[INFO] running `"docker" "start" "-a" "a248fd28a02c321479d4aa2cf5b554dd807f0ff4ff47091b84c704c901abe24c"`
[INFO] [stderr]    Compiling enum_traits v1.0.0 (https://github.com/Lolirofle/enum_traits#de2cdb22)
[INFO] [stderr]    Compiling nom v2.2.1
[INFO] [stderr]    Compiling syn v0.11.9
[INFO] [stderr]    Compiling clap v2.23.1
[INFO] [stderr]    Compiling enum_traits_macros v3.0.0 (https://github.com/Lolirofle/enum_traits#de2cdb22)
[INFO] [stderr]    Compiling simple-virtual-machine v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(try_from)]
[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 `simple-virtual-machine`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "a248fd28a02c321479d4aa2cf5b554dd807f0ff4ff47091b84c704c901abe24c"`
[INFO] running `"docker" "rm" "-f" "a248fd28a02c321479d4aa2cf5b554dd807f0ff4ff47091b84c704c901abe24c"`
[INFO] [stdout] a248fd28a02c321479d4aa2cf5b554dd807f0ff4ff47091b84c704c901abe24c