[INFO] crate rust-sort 0.1.4 is already in cache
[INFO] extracting crate rust-sort 0.1.4 into work/ex/beta-1.38-1/sources/1.37.0/reg/rust-sort/0.1.4
[INFO] extracting crate rust-sort 0.1.4 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rust-sort/0.1.4
[INFO] validating manifest of rust-sort-0.1.4 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 rust-sort-0.1.4 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 rust-sort-0.1.4
[INFO] finished frobbing rust-sort-0.1.4
[INFO] frobbed toml for rust-sort-0.1.4 written to work/ex/beta-1.38-1/sources/1.37.0/reg/rust-sort/0.1.4/Cargo.toml
[INFO] started frobbing rust-sort-0.1.4
[INFO] finished frobbing rust-sort-0.1.4
[INFO] frobbed toml for rust-sort-0.1.4 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rust-sort/0.1.4/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 rust-sort-0.1.4 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-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rust-sort/0.1.4:/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] d9b85a68cbc24ae705f2448f7a3fb1a0860d1140bdab2e743882a1aaec72d19f
[INFO] running `"docker" "start" "-a" "d9b85a68cbc24ae705f2448f7a3fb1a0860d1140bdab2e743882a1aaec72d19f"`
[INFO] [stderr]    Compiling rust-sort v0.1.4 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `"docker" "inspect" "d9b85a68cbc24ae705f2448f7a3fb1a0860d1140bdab2e743882a1aaec72d19f"`
[INFO] running `"docker" "rm" "-f" "d9b85a68cbc24ae705f2448f7a3fb1a0860d1140bdab2e743882a1aaec72d19f"`
[INFO] [stdout] d9b85a68cbc24ae705f2448f7a3fb1a0860d1140bdab2e743882a1aaec72d19f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rust-sort/0.1.4:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] 65ce2c0bf9996efd990b65dc4b0c207aea4c392749fbca914d264a60f60ad301
[INFO] running `"docker" "start" "-a" "65ce2c0bf9996efd990b65dc4b0c207aea4c392749fbca914d264a60f60ad301"`
[INFO] [stderr]    Compiling utils v0.0.1
[INFO] [stderr] error: cannot find attribute macro `experimental` in this scope
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:83:3
[INFO] [stderr]    |
[INFO] [stderr] 83 | #[experimental]
[INFO] [stderr]    |   ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: cannot find attribute macro `experimental` in this scope
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:77:3
[INFO] [stderr]    |
[INFO] [stderr] 77 | #[experimental]
[INFO] [stderr]    |   ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: cannot find attribute macro `experimental` in this scope
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:37:3
[INFO] [stderr]    |
[INFO] [stderr] 37 | #[experimental]
[INFO] [stderr]    |   ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: cannot find attribute macro `experimental` in this scope
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:29:3
[INFO] [stderr]    |
[INFO] [stderr] 29 | #[experimental]
[INFO] [stderr]    |   ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: cannot find attribute macro `experimental` in this scope
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:13:3
[INFO] [stderr]    |
[INFO] [stderr] 13 | #[experimental]
[INFO] [stderr]    |   ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: cannot find attribute macro `experimental` in this scope
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:63:3
[INFO] [stderr]    |
[INFO] [stderr] 63 | #[experimental]
[INFO] [stderr]    |   ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: cannot find attribute macro `experimental` in this scope
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:45:3
[INFO] [stderr]    |
[INFO] [stderr] 45 | #[experimental]
[INFO] [stderr]    |   ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: cannot find attribute macro `experimental` in this scope
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:37:3
[INFO] [stderr]    |
[INFO] [stderr] 37 | #[experimental]
[INFO] [stderr]    |   ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: cannot find attribute macro `experimental` in this scope
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:29:3
[INFO] [stderr]    |
[INFO] [stderr] 29 | #[experimental]
[INFO] [stderr]    |   ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: cannot find attribute macro `experimental` in this scope
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:21:3
[INFO] [stderr]    |
[INFO] [stderr] 21 | #[experimental]
[INFO] [stderr]    |   ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: cannot find attribute macro `experimental` in this scope
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:14:3
[INFO] [stderr]    |
[INFO] [stderr] 14 | #[experimental]
[INFO] [stderr]    |   ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0609]: no field `output` on type `std::process::Output`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:17:36
[INFO] [stderr]    |
[INFO] [stderr] 17 |             match str::from_utf8(p.output.as_slice()).unwrap().trim().parse() {
[INFO] [stderr]    |                                    ^^^^^^ unknown field
[INFO] [stderr]    |
[INFO] [stderr]    = note: available fields are: `status`, `stdout`, `stderr`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:18:17
[INFO] [stderr]    |
[INFO] [stderr] 17 |             match str::from_utf8(p.output.as_slice()).unwrap().trim().parse() {
[INFO] [stderr]    |                   ----------------------------------------------------------- this match expression has type `std::result::Result<_, _>`
[INFO] [stderr] 18 |                 Some(i) => i,
[INFO] [stderr]    |                 ^^^^^^^ expected enum `std::result::Result`, found enum `std::option::Option`
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `std::result::Result<_, _>`
[INFO] [stderr]               found type `std::option::Option<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:19:17
[INFO] [stderr]    |
[INFO] [stderr] 19 |                 None    => panic!("unable to cast nproc output!"),
[INFO] [stderr]    |                 ^^^^ expected enum `std::result::Result`, found enum `std::option::Option`
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `std::result::Result<_, _>`
[INFO] [stderr]               found type `std::option::Option<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0609]: no field `output` on type `std::process::Output`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:41:54
[INFO] [stderr]    |
[INFO] [stderr] 41 |             let mut res =  String::from_utf8_lossy(o.output.as_slice());
[INFO] [stderr]    |                                                      ^^^^^^ unknown field
[INFO] [stderr]    |
[INFO] [stderr]    = note: available fields are: `status`, `stdout`, `stderr`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `as_slice` found for type `&std::string::String` in the current scope
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:32:14
[INFO] [stderr]    |
[INFO] [stderr] 32 |         self.as_slice().is_empty()
[INFO] [stderr]    |              ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 16 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0308, E0599, E0609.
[INFO] [stderr] For more information about an error, try `rustc --explain E0308`.
[INFO] [stderr] error: Could not compile `utils`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "65ce2c0bf9996efd990b65dc4b0c207aea4c392749fbca914d264a60f60ad301"`
[INFO] running `"docker" "rm" "-f" "65ce2c0bf9996efd990b65dc4b0c207aea4c392749fbca914d264a60f60ad301"`
[INFO] [stdout] 65ce2c0bf9996efd990b65dc4b0c207aea4c392749fbca914d264a60f60ad301