[INFO] updating cached repository kcexn/L_KaranProjects_Rust_WordCounter
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/kcexn/L_KaranProjects_Rust_WordCounter
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/kcexn/L_KaranProjects_Rust_WordCounter" "work/ex/beta-1.38-1/sources/1.37.0/gh/kcexn/L_KaranProjects_Rust_WordCounter"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/kcexn/L_KaranProjects_Rust_WordCounter'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/kcexn/L_KaranProjects_Rust_WordCounter" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kcexn/L_KaranProjects_Rust_WordCounter"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kcexn/L_KaranProjects_Rust_WordCounter'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e8dc05e48b93dd81bb5f9b14566e1e790f214537
[INFO] sha for GitHub repo kcexn/L_KaranProjects_Rust_WordCounter: e8dc05e48b93dd81bb5f9b14566e1e790f214537
[INFO] validating manifest of kcexn/L_KaranProjects_Rust_WordCounter 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 kcexn/L_KaranProjects_Rust_WordCounter 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 kcexn/L_KaranProjects_Rust_WordCounter
[INFO] removed path dependency utils from kcexn/L_KaranProjects_Rust_WordCounter
[INFO] finished frobbing kcexn/L_KaranProjects_Rust_WordCounter
[INFO] frobbed toml for kcexn/L_KaranProjects_Rust_WordCounter written to work/ex/beta-1.38-1/sources/1.37.0/gh/kcexn/L_KaranProjects_Rust_WordCounter/Cargo.toml
[INFO] started frobbing kcexn/L_KaranProjects_Rust_WordCounter
[INFO] removed path dependency utils from kcexn/L_KaranProjects_Rust_WordCounter
[INFO] finished frobbing kcexn/L_KaranProjects_Rust_WordCounter
[INFO] frobbed toml for kcexn/L_KaranProjects_Rust_WordCounter written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kcexn/L_KaranProjects_Rust_WordCounter/Cargo.toml
[INFO] crate kcexn/L_KaranProjects_Rust_WordCounter 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] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/kcexn/L_KaranProjects_Rust_WordCounter/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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 kcexn/L_KaranProjects_Rust_WordCounter 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-4/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/kcexn/L_KaranProjects_Rust_WordCounter:/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] f302921d17729a080e2cc5404ed44064369639fa2e2cd6a9ac157617925d31f5
[INFO] running `"docker" "start" "-a" "f302921d17729a080e2cc5404ed44064369639fa2e2cd6a9ac157617925d31f5"`
[INFO] [stderr] warning: dependency (utils) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]    Compiling commandext v0.1.0
[INFO] [stderr]    Compiling utils v0.0.3
[INFO] [stderr] error: cannot find attribute macro `experimental` in this scope
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.3/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-0.0.3/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-0.0.3/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-0.0.3/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-0.0.3/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-0.0.3/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-0.0.3/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-0.0.3/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-0.0.3/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-0.0.3/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-0.0.3/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-0.0.3/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-0.0.3/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-0.0.3/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-0.0.3/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-0.0.3/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] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "f302921d17729a080e2cc5404ed44064369639fa2e2cd6a9ac157617925d31f5"`
[INFO] running `"docker" "rm" "-f" "f302921d17729a080e2cc5404ed44064369639fa2e2cd6a9ac157617925d31f5"`
[INFO] [stdout] f302921d17729a080e2cc5404ed44064369639fa2e2cd6a9ac157617925d31f5