[INFO] updating cached repository mmstick/permutate
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mmstick/permutate
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mmstick/permutate" "work/ex/beta-1.38-1/sources/1.37.0/gh/mmstick/permutate"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/mmstick/permutate'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mmstick/permutate" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mmstick/permutate"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mmstick/permutate'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a212470f14b540dd55bbc676a71e8e558aeb77a6
[INFO] sha for GitHub repo mmstick/permutate: a212470f14b540dd55bbc676a71e8e558aeb77a6
[INFO] validating manifest of mmstick/permutate 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 mmstick/permutate 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 mmstick/permutate
[INFO] finished frobbing mmstick/permutate
[INFO] frobbed toml for mmstick/permutate written to work/ex/beta-1.38-1/sources/1.37.0/gh/mmstick/permutate/Cargo.toml
[INFO] started frobbing mmstick/permutate
[INFO] finished frobbing mmstick/permutate
[INFO] frobbed toml for mmstick/permutate written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mmstick/permutate/Cargo.toml
[INFO] crate mmstick/permutate 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 mmstick/permutate 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/mmstick/permutate:/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] d80991bfc87b3647b0f8a8a7cff896ab0cd60f5818f51459cfb7771736f914b1
[INFO] running `"docker" "start" "-a" "d80991bfc87b3647b0f8a8a7cff896ab0cd60f5818f51459cfb7771736f914b1"`
[INFO] [stderr] warning: An explicit [[bin]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other binary targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a binary target:
[INFO] [stderr] 
[INFO] [stderr] * /opt/crater/workdir/src/bin/mod.rs
[INFO] [stderr] * /opt/crater/workdir/src/bin/buffer.rs
[INFO] [stderr] * /opt/crater/workdir/src/bin/man.rs
[INFO] [stderr] * /opt/crater/workdir/src/bin/arguments.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a binary target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autobins = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr]    Compiling permutate v0.3.2 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(external_doc)]
[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 `permutate`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "d80991bfc87b3647b0f8a8a7cff896ab0cd60f5818f51459cfb7771736f914b1"`
[INFO] running `"docker" "rm" "-f" "d80991bfc87b3647b0f8a8a7cff896ab0cd60f5818f51459cfb7771736f914b1"`
[INFO] [stdout] d80991bfc87b3647b0f8a8a7cff896ab0cd60f5818f51459cfb7771736f914b1