[INFO] updating cached repository alexeyzab/nock-interpreter
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/alexeyzab/nock-interpreter
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/alexeyzab/nock-interpreter" "work/ex/beta-1.38-1/sources/1.37.0/gh/alexeyzab/nock-interpreter"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/alexeyzab/nock-interpreter'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/alexeyzab/nock-interpreter" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/alexeyzab/nock-interpreter"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/alexeyzab/nock-interpreter'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 373d526e30c9f3646a7dac0a6349e1bd62d9b553
[INFO] sha for GitHub repo alexeyzab/nock-interpreter: 373d526e30c9f3646a7dac0a6349e1bd62d9b553
[INFO] validating manifest of alexeyzab/nock-interpreter 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 alexeyzab/nock-interpreter 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 alexeyzab/nock-interpreter
[INFO] finished frobbing alexeyzab/nock-interpreter
[INFO] frobbed toml for alexeyzab/nock-interpreter written to work/ex/beta-1.38-1/sources/1.37.0/gh/alexeyzab/nock-interpreter/Cargo.toml
[INFO] started frobbing alexeyzab/nock-interpreter
[INFO] finished frobbing alexeyzab/nock-interpreter
[INFO] frobbed toml for alexeyzab/nock-interpreter written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/alexeyzab/nock-interpreter/Cargo.toml
[INFO] crate alexeyzab/nock-interpreter 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 alexeyzab/nock-interpreter 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-1/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/alexeyzab/nock-interpreter:/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] 6c9818cef6d03f2096a87f521176d3157e99f8910d141f5244b91b1ec639db4c
[INFO] running `"docker" "start" "-a" "6c9818cef6d03f2096a87f521176d3157e99f8910d141f5244b91b1ec639db4c"`
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling static_assertions v0.2.5
[INFO] [stderr]    Compiling nom v5.0.0
[INFO] [stderr]    Compiling stackvector v1.0.6
[INFO] [stderr]    Compiling lexical-core v0.4.2
[INFO] [stderr]    Compiling nock-interpreter v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(box_syntax, box_patterns)]
[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 `nock-interpreter`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "6c9818cef6d03f2096a87f521176d3157e99f8910d141f5244b91b1ec639db4c"`
[INFO] running `"docker" "rm" "-f" "6c9818cef6d03f2096a87f521176d3157e99f8910d141f5244b91b1ec639db4c"`
[INFO] [stdout] 6c9818cef6d03f2096a87f521176d3157e99f8910d141f5244b91b1ec639db4c