[INFO] updating cached repository japaric/sc-gen
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/japaric/sc-gen
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/japaric/sc-gen" "work/ex/beta-1.37-6/sources/1.36.0/gh/japaric/sc-gen"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/japaric/sc-gen'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/japaric/sc-gen" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/japaric/sc-gen"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/japaric/sc-gen'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6f01f0b59fe8a907d5b37856e4d54883bc680997
[INFO] sha for GitHub repo japaric/sc-gen: 6f01f0b59fe8a907d5b37856e4d54883bc680997
[INFO] validating manifest of japaric/sc-gen 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 japaric/sc-gen 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 japaric/sc-gen
[INFO] finished frobbing japaric/sc-gen
[INFO] frobbed toml for japaric/sc-gen written to work/ex/beta-1.37-6/sources/1.36.0/gh/japaric/sc-gen/Cargo.toml
[INFO] started frobbing japaric/sc-gen
[INFO] finished frobbing japaric/sc-gen
[INFO] frobbed toml for japaric/sc-gen written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/japaric/sc-gen/Cargo.toml
[INFO] crate japaric/sc-gen 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]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing japaric/sc-gen 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/gh/japaric/sc-gen:/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] a16798457eb08eea8d1d7adf0c584940a2c6a04053642912fb5e43a6e461dbd2
[INFO] running `"docker" "start" "-a" "a16798457eb08eea8d1d7adf0c584940a2c6a04053642912fb5e43a6e461dbd2"`
[INFO] [stderr]    Compiling sc-gen v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(static_in_const)]
[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 `sc-gen`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "a16798457eb08eea8d1d7adf0c584940a2c6a04053642912fb5e43a6e461dbd2"`
[INFO] running `"docker" "rm" "-f" "a16798457eb08eea8d1d7adf0c584940a2c6a04053642912fb5e43a6e461dbd2"`
[INFO] [stdout] a16798457eb08eea8d1d7adf0c584940a2c6a04053642912fb5e43a6e461dbd2