[INFO] updating cached repository flum1025/twistributer
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/flum1025/twistributer
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/flum1025/twistributer" "work/ex/beta-1.38-1/sources/1.37.0/gh/flum1025/twistributer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/flum1025/twistributer'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/flum1025/twistributer" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/flum1025/twistributer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/flum1025/twistributer'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d96f63663981d451ecbcb3190d9ea7fe4b513653
[INFO] sha for GitHub repo flum1025/twistributer: d96f63663981d451ecbcb3190d9ea7fe4b513653
[INFO] validating manifest of flum1025/twistributer 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 flum1025/twistributer 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 flum1025/twistributer
[INFO] finished frobbing flum1025/twistributer
[INFO] frobbed toml for flum1025/twistributer written to work/ex/beta-1.38-1/sources/1.37.0/gh/flum1025/twistributer/Cargo.toml
[INFO] started frobbing flum1025/twistributer
[INFO] finished frobbing flum1025/twistributer
[INFO] frobbed toml for flum1025/twistributer written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/flum1025/twistributer/Cargo.toml
[INFO] crate flum1025/twistributer 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 flum1025/twistributer 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/flum1025/twistributer:/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] 07e00ef4840a204ae53354cbc95ecec0fa256e914fddf25da5b01a57904d5a8a
[INFO] running `"docker" "start" "-a" "07e00ef4840a204ae53354cbc95ecec0fa256e914fddf25da5b01a57904d5a8a"`
[INFO] [stderr]    Compiling pulldown-cmark v0.1.2
[INFO] [stderr]    Compiling rustc_tools_util v0.1.0 (https://github.com/rust-lang-nursery/rust-clippy#c0c770c6)
[INFO] [stderr]    Compiling if_chain v0.1.3
[INFO] [stderr]    Compiling quine-mc_cluskey v0.2.4
[INFO] [stderr]    Compiling encoding_rs v0.8.6
[INFO] [stderr]    Compiling uuid v0.7.1
[INFO] [stderr]    Compiling want v0.0.6
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling indexmap v1.0.1
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/git/checkouts/rust-clippy-96f6c8ce0bc85cf5/c0c770c/rustc_tools_util/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(test)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/git/checkouts/rust-clippy-96f6c8ce0bc85cf5/c0c770c/rustc_tools_util/src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(tool_lints)]
[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 `rustc_tools_util`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "07e00ef4840a204ae53354cbc95ecec0fa256e914fddf25da5b01a57904d5a8a"`
[INFO] running `"docker" "rm" "-f" "07e00ef4840a204ae53354cbc95ecec0fa256e914fddf25da5b01a57904d5a8a"`
[INFO] [stdout] 07e00ef4840a204ae53354cbc95ecec0fa256e914fddf25da5b01a57904d5a8a