[INFO] updating cached repository chrisdickinson/blog-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/chrisdickinson/blog-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/chrisdickinson/blog-rs" "work/ex/beta-1.37-6/sources/1.36.0/gh/chrisdickinson/blog-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/chrisdickinson/blog-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/chrisdickinson/blog-rs" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/chrisdickinson/blog-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/chrisdickinson/blog-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2d1dc6c6db542c1dc8a008c4826891a861ac3c2f
[INFO] sha for GitHub repo chrisdickinson/blog-rs: 2d1dc6c6db542c1dc8a008c4826891a861ac3c2f
[INFO] validating manifest of chrisdickinson/blog-rs 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 chrisdickinson/blog-rs 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 chrisdickinson/blog-rs
[INFO] finished frobbing chrisdickinson/blog-rs
[INFO] frobbed toml for chrisdickinson/blog-rs written to work/ex/beta-1.37-6/sources/1.36.0/gh/chrisdickinson/blog-rs/Cargo.toml
[INFO] started frobbing chrisdickinson/blog-rs
[INFO] finished frobbing chrisdickinson/blog-rs
[INFO] frobbed toml for chrisdickinson/blog-rs written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/chrisdickinson/blog-rs/Cargo.toml
[INFO] crate chrisdickinson/blog-rs 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing chrisdickinson/blog-rs 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-3/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/chrisdickinson/blog-rs:/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] db4bcec01a1f6c5c1e1cf71ffff8135a15cdc360360d126430314993e5a0fc36
[INFO] running `"docker" "start" "-a" "db4bcec01a1f6c5c1e1cf71ffff8135a15cdc360360d126430314993e5a0fc36"`
[INFO] [stderr]    Compiling syn v0.15.31
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling futures-core-preview v0.3.0-alpha.14
[INFO] [stderr]    Compiling twoway v0.1.8
[INFO] [stderr]    Compiling buf_redux v0.8.1
[INFO] [stderr]    Compiling slog-async v2.3.0
[INFO] [stderr]    Compiling cookie v0.11.0
[INFO] [stderr]    Compiling slog-term v2.4.0
[INFO] [stderr]    Compiling serde_qs v0.4.5
[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/futures-core-preview-0.3.0-alpha.14/src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(futures_api)]
[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 `futures-core-preview`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "db4bcec01a1f6c5c1e1cf71ffff8135a15cdc360360d126430314993e5a0fc36"`
[INFO] running `"docker" "rm" "-f" "db4bcec01a1f6c5c1e1cf71ffff8135a15cdc360360d126430314993e5a0fc36"`
[INFO] [stdout] db4bcec01a1f6c5c1e1cf71ffff8135a15cdc360360d126430314993e5a0fc36