[INFO] updating cached repository AndroidOatmeal/rust-mtg-sim
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/AndroidOatmeal/rust-mtg-sim
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/AndroidOatmeal/rust-mtg-sim" "work/ex/beta-1.37-6/sources/1.36.0/gh/AndroidOatmeal/rust-mtg-sim"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/AndroidOatmeal/rust-mtg-sim'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/AndroidOatmeal/rust-mtg-sim" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/AndroidOatmeal/rust-mtg-sim"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/AndroidOatmeal/rust-mtg-sim'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 09c6d296885dae2ded345456273411304a95d5e7
[INFO] sha for GitHub repo AndroidOatmeal/rust-mtg-sim: 09c6d296885dae2ded345456273411304a95d5e7
[INFO] validating manifest of AndroidOatmeal/rust-mtg-sim 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 AndroidOatmeal/rust-mtg-sim 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 AndroidOatmeal/rust-mtg-sim
[INFO] finished frobbing AndroidOatmeal/rust-mtg-sim
[INFO] frobbed toml for AndroidOatmeal/rust-mtg-sim written to work/ex/beta-1.37-6/sources/1.36.0/gh/AndroidOatmeal/rust-mtg-sim/Cargo.toml
[INFO] started frobbing AndroidOatmeal/rust-mtg-sim
[INFO] finished frobbing AndroidOatmeal/rust-mtg-sim
[INFO] frobbed toml for AndroidOatmeal/rust-mtg-sim written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/AndroidOatmeal/rust-mtg-sim/Cargo.toml
[INFO] crate AndroidOatmeal/rust-mtg-sim 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] error: the lock file /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/AndroidOatmeal/rust-mtg-sim/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/Manishearth/rust-clippy`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/Manishearth/rust-clippy`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing AndroidOatmeal/rust-mtg-sim against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/AndroidOatmeal/rust-mtg-sim:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 3dff49f39eb516b65ab6e8fc5f515e636d05c89118ede56848700e4e7bf1eac7
[INFO] running `"docker" "start" "-a" "3dff49f39eb516b65ab6e8fc5f515e636d05c89118ede56848700e4e7bf1eac7"`
[INFO] [stderr]    Compiling smallvec v0.6.10
[INFO] [stderr]    Compiling pulldown-cmark v0.5.3
[INFO] [stderr]    Compiling rustc_tools_util v0.1.1 (https://github.com/Manishearth/rust-clippy#3710ec59)
[INFO] [stderr]    Compiling if_chain v0.1.3
[INFO] [stderr]    Compiling quine-mc_cluskey v0.2.4
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]    Compiling serde_json v1.0.40
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling toml v0.5.1
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/smallvec-0.6.10/lib.rs:33:32
[INFO] [stderr]    |
[INFO] [stderr] 33 | #![cfg_attr(feature = "union", feature(untagged_unions))]
[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 `smallvec`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "3dff49f39eb516b65ab6e8fc5f515e636d05c89118ede56848700e4e7bf1eac7"`
[INFO] running `"docker" "rm" "-f" "3dff49f39eb516b65ab6e8fc5f515e636d05c89118ede56848700e4e7bf1eac7"`
[INFO] [stdout] 3dff49f39eb516b65ab6e8fc5f515e636d05c89118ede56848700e4e7bf1eac7