[INFO] crate unwalk 0.2.0-beta1 is already in cache
[INFO] extracting crate unwalk 0.2.0-beta1 into work/ex/beta-1.38-1/sources/1.37.0/reg/unwalk/0.2.0-beta1
[INFO] extracting crate unwalk 0.2.0-beta1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/unwalk/0.2.0-beta1
[INFO] validating manifest of unwalk-0.2.0-beta1 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 unwalk-0.2.0-beta1 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 unwalk-0.2.0-beta1
[INFO] finished frobbing unwalk-0.2.0-beta1
[INFO] frobbed toml for unwalk-0.2.0-beta1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/unwalk/0.2.0-beta1/Cargo.toml
[INFO] started frobbing unwalk-0.2.0-beta1
[INFO] finished frobbing unwalk-0.2.0-beta1
[INFO] frobbed toml for unwalk-0.2.0-beta1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/unwalk/0.2.0-beta1/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 unwalk-0.2.0-beta1 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/reg/unwalk/0.2.0-beta1:/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] 02431fb6664dd2d274532fcf715d849420665e455930f3521e62a9e9fcff6efe
[INFO] running `"docker" "start" "-a" "02431fb6664dd2d274532fcf715d849420665e455930f3521e62a9e9fcff6efe"`
[INFO] [stderr]    Compiling textwrap v0.9.0
[INFO] [stderr]    Compiling toml v0.4.5
[INFO] [stderr]    Compiling walkdir v2.1.4
[INFO] [stderr]    Compiling filebuffer v0.3.0
[INFO] [stderr]    Compiling syn v0.13.11
[INFO] [stderr]    Compiling structopt-derive v0.2.6
[INFO] [stderr]    Compiling failure v0.1.1
[INFO] [stderr]    Compiling clap v2.31.2
[INFO] [stderr]    Compiling unwalk-base v0.2.0-beta1
[INFO] [stderr] error[E0407]: method `name` is not a member of trait `failure::Fail`
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/unwalk-base-0.2.0-beta1/src/error.rs:8:10
[INFO] [stderr]   |
[INFO] [stderr] 8 | #[derive(Fail, Debug)]
[INFO] [stderr]   |          ^^^^ not a member of trait `failure::Fail`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `_core` in `failure`
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/unwalk-base-0.2.0-beta1/src/error.rs:8:10
[INFO] [stderr]   |
[INFO] [stderr] 8 | #[derive(Fail, Debug)]
[INFO] [stderr]   |          ^^^^ could not find `_core` in `failure`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `AsFail` in `failure`
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/unwalk-base-0.2.0-beta1/src/error.rs:8:10
[INFO] [stderr]   |
[INFO] [stderr] 8 | #[derive(Fail, Debug)]
[INFO] [stderr]   |          ^^^^ could not find `AsFail` in `failure`
[INFO] [stderr] 
[INFO] [stderr] error[E0407]: method `name` is not a member of trait `failure::Fail`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/unwalk-base-0.2.0-beta1/src/error.rs:42:10
[INFO] [stderr]    |
[INFO] [stderr] 42 | #[derive(Fail, Debug)]
[INFO] [stderr]    |          ^^^^ not a member of trait `failure::Fail`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `_core` in `failure`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/unwalk-base-0.2.0-beta1/src/error.rs:42:10
[INFO] [stderr]    |
[INFO] [stderr] 42 | #[derive(Fail, Debug)]
[INFO] [stderr]    |          ^^^^ could not find `_core` in `failure`
[INFO] [stderr] 
[INFO] [stderr] error[E0407]: method `name` is not a member of trait `failure::Fail`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/unwalk-base-0.2.0-beta1/src/error.rs:67:45
[INFO] [stderr]    |
[INFO] [stderr] 67 | #[derive(Copy, Clone, Eq, PartialEq, Debug, Fail)]
[INFO] [stderr]    |                                             ^^^^ not a member of trait `failure::Fail`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `_core` in `failure`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/unwalk-base-0.2.0-beta1/src/error.rs:67:45
[INFO] [stderr]    |
[INFO] [stderr] 67 | #[derive(Copy, Clone, Eq, PartialEq, Debug, Fail)]
[INFO] [stderr]    |                                             ^^^^ could not find `_core` in `failure`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 7 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0407, E0433.
[INFO] [stderr] For more information about an error, try `rustc --explain E0407`.
[INFO] [stderr] error: Could not compile `unwalk-base`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "02431fb6664dd2d274532fcf715d849420665e455930f3521e62a9e9fcff6efe"`
[INFO] running `"docker" "rm" "-f" "02431fb6664dd2d274532fcf715d849420665e455930f3521e62a9e9fcff6efe"`
[INFO] [stdout] 02431fb6664dd2d274532fcf715d849420665e455930f3521e62a9e9fcff6efe