[INFO] fetching crate sauron-native 0.1.0...
[INFO] extracting crate sauron-native 0.1.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/sauron-native/0.1.0
[INFO] extracting crate sauron-native 0.1.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/sauron-native/0.1.0
[INFO] validating manifest of sauron-native-0.1.0 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of sauron-native-0.1.0 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing sauron-native-0.1.0
[INFO] finished frobbing sauron-native-0.1.0
[INFO] frobbed toml for sauron-native-0.1.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/sauron-native/0.1.0/Cargo.toml
[INFO] started frobbing sauron-native-0.1.0
[INFO] finished frobbing sauron-native-0.1.0
[INFO] frobbed toml for sauron-native-0.1.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/sauron-native/0.1.0/Cargo.toml
[INFO] crate sauron-native-0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded sauron_vdom v0.10.0
[INFO] [stderr]   Downloaded sauron v0.10.0
[INFO] [stderr]   Downloaded itui v0.7.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing sauron-native-0.1.0 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/sauron-native/0.1.0:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] fd9dba95b309fa0300c36155f5f9bd08ee8cd35ab565e2c68874858efb83d3c0
[INFO] running `"docker" "start" "-a" "fd9dba95b309fa0300c36155f5f9bd08ee8cd35ab565e2c68874858efb83d3c0"`
[INFO] [stderr]    Compiling sauron_vdom v0.10.0
[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/sauron_vdom-0.10.0/src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(arbitrary_self_types)]
[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 `sauron_vdom`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "fd9dba95b309fa0300c36155f5f9bd08ee8cd35ab565e2c68874858efb83d3c0"`
[INFO] running `"docker" "rm" "-f" "fd9dba95b309fa0300c36155f5f9bd08ee8cd35ab565e2c68874858efb83d3c0"`
[INFO] [stdout] fd9dba95b309fa0300c36155f5f9bd08ee8cd35ab565e2c68874858efb83d3c0