[INFO] updating cached repository eeeeeta/mfl-gramophone
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/eeeeeta/mfl-gramophone
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/eeeeeta/mfl-gramophone" "work/ex/beta-1.38-1/sources/1.37.0/gh/eeeeeta/mfl-gramophone"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/eeeeeta/mfl-gramophone'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/eeeeeta/mfl-gramophone" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/eeeeeta/mfl-gramophone"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/eeeeeta/mfl-gramophone'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 194dc7f0d81d07ecd87eb3e6d7e1f0e29c6b0a44
[INFO] sha for GitHub repo eeeeeta/mfl-gramophone: 194dc7f0d81d07ecd87eb3e6d7e1f0e29c6b0a44
[INFO] validating manifest of eeeeeta/mfl-gramophone 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 eeeeeta/mfl-gramophone 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 eeeeeta/mfl-gramophone
[INFO] finished frobbing eeeeeta/mfl-gramophone
[INFO] frobbed toml for eeeeeta/mfl-gramophone written to work/ex/beta-1.38-1/sources/1.37.0/gh/eeeeeta/mfl-gramophone/Cargo.toml
[INFO] started frobbing eeeeeta/mfl-gramophone
[INFO] finished frobbing eeeeeta/mfl-gramophone
[INFO] frobbed toml for eeeeeta/mfl-gramophone written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/eeeeeta/mfl-gramophone/Cargo.toml
[INFO] crate eeeeeta/mfl-gramophone 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 eeeeeta/mfl-gramophone 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-1/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/eeeeeta/mfl-gramophone:/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] 20547ca489e5cbbbd266121ce5ac5935e68d2534c819c10a794a1551e1661c7e
[INFO] running `"docker" "start" "-a" "20547ca489e5cbbbd266121ce5ac5935e68d2534c819c10a794a1551e1661c7e"`
[INFO] [stderr]    Compiling libloading v0.4.3
[INFO] [stderr]    Compiling bindgen v0.32.3
[INFO] [stderr]    Compiling serde v1.0.80
[INFO] [stderr]    Compiling nodrop-union v0.1.9
[INFO] [stderr]    Compiling odds v0.2.26
[INFO] [stderr]    Compiling sample v0.10.0
[INFO] [stderr]    Compiling rust-ini v0.12.2
[INFO] [stderr]    Compiling bounded-spsc-queue v0.4.0
[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/nodrop-union-0.1.9/src/lib.rs:21:1
[INFO] [stderr]    |
[INFO] [stderr] 21 | #![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 `nodrop-union`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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/bounded-spsc-queue-0.4.0/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(allocator_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 `bounded-spsc-queue`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "20547ca489e5cbbbd266121ce5ac5935e68d2534c819c10a794a1551e1661c7e"`
[INFO] running `"docker" "rm" "-f" "20547ca489e5cbbbd266121ce5ac5935e68d2534c819c10a794a1551e1661c7e"`
[INFO] [stdout] 20547ca489e5cbbbd266121ce5ac5935e68d2534c819c10a794a1551e1661c7e