[INFO] updating cached repository haxxpop/torkeygen
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/haxxpop/torkeygen
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/haxxpop/torkeygen" "work/ex/beta-1.38-1/sources/1.37.0/gh/haxxpop/torkeygen"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/haxxpop/torkeygen'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/haxxpop/torkeygen" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/haxxpop/torkeygen"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/haxxpop/torkeygen'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c0a9b500abee84e55813faaa50bb9c9e9e97b8f1
[INFO] sha for GitHub repo haxxpop/torkeygen: c0a9b500abee84e55813faaa50bb9c9e9e97b8f1
[INFO] validating manifest of haxxpop/torkeygen 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 haxxpop/torkeygen 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 haxxpop/torkeygen
[INFO] finished frobbing haxxpop/torkeygen
[INFO] frobbed toml for haxxpop/torkeygen written to work/ex/beta-1.38-1/sources/1.37.0/gh/haxxpop/torkeygen/Cargo.toml
[INFO] started frobbing haxxpop/torkeygen
[INFO] finished frobbing haxxpop/torkeygen
[INFO] frobbed toml for haxxpop/torkeygen written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/haxxpop/torkeygen/Cargo.toml
[INFO] crate haxxpop/torkeygen 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 haxxpop/torkeygen 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/haxxpop/torkeygen:/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] 8717881e2cb6f8966727e3b78d11981b83127cfecb4a7662afaf65b2ee0079f3
[INFO] running `"docker" "start" "-a" "8717881e2cb6f8966727e3b78d11981b83127cfecb4a7662afaf65b2ee0079f3"`
[INFO] [stderr]    Compiling subtle v0.6.3
[INFO] [stderr]    Compiling base32 v0.3.1
[INFO] [stderr]    Compiling clear_on_drop v0.2.3
[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/subtle-0.6.3/src/lib.rs:13:34
[INFO] [stderr]    |
[INFO] [stderr] 13 | #![cfg_attr(feature = "nightly", feature(asm))]
[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/subtle-0.6.3/src/lib.rs:14:34
[INFO] [stderr]    |
[INFO] [stderr] 14 | #![cfg_attr(feature = "nightly", feature(external_doc))]
[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 `subtle`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "8717881e2cb6f8966727e3b78d11981b83127cfecb4a7662afaf65b2ee0079f3"`
[INFO] running `"docker" "rm" "-f" "8717881e2cb6f8966727e3b78d11981b83127cfecb4a7662afaf65b2ee0079f3"`
[INFO] [stdout] 8717881e2cb6f8966727e3b78d11981b83127cfecb4a7662afaf65b2ee0079f3