[INFO] updating cached repository dpc/brainwiki
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dpc/brainwiki
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dpc/brainwiki" "work/ex/beta-1.38-1/sources/1.37.0/gh/dpc/brainwiki"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/dpc/brainwiki'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dpc/brainwiki" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dpc/brainwiki"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dpc/brainwiki'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bd049182c8a02c11b4bde3c55335c8653bae7e2e
[INFO] sha for GitHub repo dpc/brainwiki: bd049182c8a02c11b4bde3c55335c8653bae7e2e
[INFO] validating manifest of dpc/brainwiki 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 dpc/brainwiki 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 dpc/brainwiki
[INFO] finished frobbing dpc/brainwiki
[INFO] frobbed toml for dpc/brainwiki written to work/ex/beta-1.38-1/sources/1.37.0/gh/dpc/brainwiki/Cargo.toml
[INFO] started frobbing dpc/brainwiki
[INFO] finished frobbing dpc/brainwiki
[INFO] frobbed toml for dpc/brainwiki written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dpc/brainwiki/Cargo.toml
[INFO] crate dpc/brainwiki 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 dpc/brainwiki against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dpc/brainwiki:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 014c68b7c83fec073ef9b4fcee12363a5d5324ef675304fa0fce0978148e9390
[INFO] running `"docker" "start" "-a" "014c68b7c83fec073ef9b4fcee12363a5d5324ef675304fa0fce0978148e9390"`
[INFO] [stderr] warning: the cargo feature `edition` is now stable and is no longer necessary to be listed in the manifest
[INFO] [stderr]    Compiling lazy_static v1.0.2
[INFO] [stderr]    Compiling futures v0.1.23
[INFO] [stderr]    Compiling matches v0.1.7
[INFO] [stderr]    Compiling itoa v0.4.2
[INFO] [stderr]    Compiling pulldown-cmark v0.1.2
[INFO] [stderr]    Compiling bytecount v0.3.1
[INFO] [stderr]    Compiling regex v1.0.2
[INFO] [stderr]    Compiling stable_deref_trait v1.1.0
[INFO] [stderr]    Compiling data-encoding v2.1.1
[INFO] [stderr]    Compiling http-range v0.1.1
[INFO] [stderr]    Compiling boolinator v2.4.0
[INFO] [stderr]    Compiling file v1.1.2
[INFO] [stderr]    Compiling stpl v0.5.0 (http://github.com/dpc/stpl#f524d39a)
[INFO] [stderr]    Compiling hostname v0.1.5
[INFO] [stderr]    Compiling rpassword v2.0.0
[INFO] [stderr]    Compiling inotify v0.3.0
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/git/checkouts/stpl-62a66fe7db697e24/f524d39/src/lib.rs:97:1
[INFO] [stderr]    |
[INFO] [stderr] 97 | #![feature(unboxed_closures)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/git/checkouts/stpl-62a66fe7db697e24/f524d39/src/lib.rs:98:1
[INFO] [stderr]    |
[INFO] [stderr] 98 | #![feature(fn_traits)]
[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 `stpl`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "014c68b7c83fec073ef9b4fcee12363a5d5324ef675304fa0fce0978148e9390"`
[INFO] running `"docker" "rm" "-f" "014c68b7c83fec073ef9b4fcee12363a5d5324ef675304fa0fce0978148e9390"`
[INFO] [stdout] 014c68b7c83fec073ef9b4fcee12363a5d5324ef675304fa0fce0978148e9390