[INFO] updating cached repository reillysiemens/imagr
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/reillysiemens/imagr
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/reillysiemens/imagr" "work/ex/beta-1.38-1/sources/1.37.0/gh/reillysiemens/imagr"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/reillysiemens/imagr'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/reillysiemens/imagr" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/reillysiemens/imagr"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/reillysiemens/imagr'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e06e1d8e7ce81fac361ae1c2fbe479f0e85ecce6
[INFO] sha for GitHub repo reillysiemens/imagr: e06e1d8e7ce81fac361ae1c2fbe479f0e85ecce6
[INFO] validating manifest of reillysiemens/imagr 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 reillysiemens/imagr 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 reillysiemens/imagr
[INFO] finished frobbing reillysiemens/imagr
[INFO] frobbed toml for reillysiemens/imagr written to work/ex/beta-1.38-1/sources/1.37.0/gh/reillysiemens/imagr/Cargo.toml
[INFO] started frobbing reillysiemens/imagr
[INFO] finished frobbing reillysiemens/imagr
[INFO] frobbed toml for reillysiemens/imagr written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/reillysiemens/imagr/Cargo.toml
[INFO] crate reillysiemens/imagr 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 reillysiemens/imagr 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/reillysiemens/imagr:/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] f602f2543497fae343b405c415f4cc49d046efabe7892a7a0d8ca8419a7aa3a4
[INFO] running `"docker" "start" "-a" "f602f2543497fae343b405c415f4cc49d046efabe7892a7a0d8ca8419a7aa3a4"`
[INFO] [stderr] warning: the cargo feature `edition` is now stable and is no longer necessary to be listed in the manifest
[INFO] [stderr]    Compiling rand_core v0.2.1
[INFO] [stderr]    Compiling byteorder v1.2.3
[INFO] [stderr]    Compiling cc v1.0.17
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]    Compiling regex v1.0.1
[INFO] [stderr]    Compiling openssl v0.10.10
[INFO] [stderr]    Compiling string v0.1.0
[INFO] [stderr]    Compiling native-tls v0.2.0
[INFO] [stderr]    Compiling ryu v0.2.3
[INFO] [stderr]    Compiling rustc-demangle v0.1.8
[INFO] [stderr]    Compiling termcolor v0.3.6
[INFO] [stderr]    Compiling pin-utils v0.1.0-alpha.2
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/pin-utils-0.1.0-alpha.2/src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(pin)]
[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 `pin-utils`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "f602f2543497fae343b405c415f4cc49d046efabe7892a7a0d8ca8419a7aa3a4"`
[INFO] running `"docker" "rm" "-f" "f602f2543497fae343b405c415f4cc49d046efabe7892a7a0d8ca8419a7aa3a4"`
[INFO] [stdout] f602f2543497fae343b405c415f4cc49d046efabe7892a7a0d8ca8419a7aa3a4