[INFO] updating cached repository damody/sflow_read
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/damody/sflow_read
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/damody/sflow_read" "work/ex/beta-1.38-1/sources/1.37.0/gh/damody/sflow_read"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/damody/sflow_read'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/damody/sflow_read" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/damody/sflow_read"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/damody/sflow_read'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6b23cede752f2e3b9dd1876dd1b8e8e2a17d458b
[INFO] sha for GitHub repo damody/sflow_read: 6b23cede752f2e3b9dd1876dd1b8e8e2a17d458b
[INFO] validating manifest of damody/sflow_read 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 damody/sflow_read 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 damody/sflow_read
[INFO] finished frobbing damody/sflow_read
[INFO] frobbed toml for damody/sflow_read written to work/ex/beta-1.38-1/sources/1.37.0/gh/damody/sflow_read/Cargo.toml
[INFO] started frobbing damody/sflow_read
[INFO] finished frobbing damody/sflow_read
[INFO] frobbed toml for damody/sflow_read written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/damody/sflow_read/Cargo.toml
[INFO] crate damody/sflow_read 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 damody/sflow_read 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/damody/sflow_read:/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] 1ecf68f5b298cc0c38a343935b605e68bac837a7e2da53cba0158a7faebda7d4
[INFO] running `"docker" "start" "-a" "1ecf68f5b298cc0c38a343935b605e68bac837a7e2da53cba0158a7faebda7d4"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling text_io v0.1.7
[INFO] [stderr]    Compiling mercator v0.1.2
[INFO] [stderr]    Compiling actix-web v0.7.13
[INFO] [stderr]    Compiling ring v0.13.2
[INFO] [stderr]    Compiling socket2 v0.3.8
[INFO] [stderr]    Compiling resolv-conf v0.6.1
[INFO] [stderr]    Compiling r2d2 v0.8.2
[INFO] [stderr]    Compiling tokio-io v0.1.9
[INFO] [stderr]    Compiling url v1.7.1
[INFO] [stderr]    Compiling derive-error-chain v0.10.1
[INFO] [stderr]    Compiling diesel v0.16.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.6.0
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling syn v0.15.11
[INFO] [stderr]    Compiling flate2 v1.0.4
[INFO] [stderr]    Compiling backtrace v0.2.3
[INFO] [stderr]    Compiling openssl v0.10.15
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling h2 v0.1.13
[INFO] [stderr]    Compiling error-chain v0.1.12
[INFO] [stderr]    Compiling tokio-threadpool v0.1.7
[INFO] [stderr]    Compiling tokio-reactor v0.1.6
[INFO] [stderr]    Compiling crossbeam-channel v0.2.6
[INFO] [stderr]    Compiling tokio-udp v0.1.2
[INFO] [stderr]    Compiling tokio-uds v0.2.2
[INFO] [stderr]    Compiling tokio-tcp v0.1.2
[INFO] [stderr]    Compiling tokio-signal v0.2.5
[INFO] [stderr]    Compiling tokio-openssl v0.2.1
[INFO] [stderr]    Compiling tokio-fs v0.1.3
[INFO] [stderr]    Compiling trust-dns-proto v0.4.3
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]    Compiling tokio v0.1.11
[INFO] [stderr]    Compiling cookie v0.11.0
[INFO] [stderr]    Compiling diesel_infer_schema v0.16.0
[INFO] [stderr]    Compiling dotenv v0.10.1
[INFO] [stderr] error[E0659]: `error_chain` is ambiguous (derive helper attribute vs any other name)
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/dotenv-0.10.1/src/lib.rs:23:40
[INFO] [stderr]    |
[INFO] [stderr] 23 | #[cfg_attr(not(feature = "backtrace"), error_chain(backtrace = "false"))]
[INFO] [stderr]    |                                        ^^^^^^^^^^^ ambiguous name
[INFO] [stderr]    |
[INFO] [stderr] note: `error_chain` could refer to the derive helper attribute defined here
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/dotenv-0.10.1/src/lib.rs:22:17
[INFO] [stderr]    |
[INFO] [stderr] 22 | #[derive(Debug, error_chain)]
[INFO] [stderr]    |                 ^^^^^^^^^^^
[INFO] [stderr] note: `error_chain` could also refer to the derive macro imported here
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/dotenv-0.10.1/src/lib.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | #[macro_use]
[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 E0659`.
[INFO] [stderr] error: Could not compile `dotenv`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "1ecf68f5b298cc0c38a343935b605e68bac837a7e2da53cba0158a7faebda7d4"`
[INFO] running `"docker" "rm" "-f" "1ecf68f5b298cc0c38a343935b605e68bac837a7e2da53cba0158a7faebda7d4"`
[INFO] [stdout] 1ecf68f5b298cc0c38a343935b605e68bac837a7e2da53cba0158a7faebda7d4