[INFO] fetching crate ellipticoin-test-framework 0.1.2...
[INFO] extracting crate ellipticoin-test-framework 0.1.2 into work/ex/beta-1.37-6/sources/1.36.0/reg/ellipticoin-test-framework/0.1.2
[INFO] extracting crate ellipticoin-test-framework 0.1.2 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/ellipticoin-test-framework/0.1.2
[INFO] validating manifest of ellipticoin-test-framework-0.1.2 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ellipticoin-test-framework-0.1.2 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ellipticoin-test-framework-0.1.2
[INFO] finished frobbing ellipticoin-test-framework-0.1.2
[INFO] frobbed toml for ellipticoin-test-framework-0.1.2 written to work/ex/beta-1.37-6/sources/1.36.0/reg/ellipticoin-test-framework/0.1.2/Cargo.toml
[INFO] started frobbing ellipticoin-test-framework-0.1.2
[INFO] finished frobbing ellipticoin-test-framework-0.1.2
[INFO] frobbed toml for ellipticoin-test-framework-0.1.2 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/ellipticoin-test-framework/0.1.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing ellipticoin-test-framework-0.1.2 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/ellipticoin-test-framework/0.1.2:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 0bf5c64dc472995e84048f86793b73ae3c2834a2d1637fe9d30f98bb410af0ec
[INFO] running `"docker" "start" "-a" "0bf5c64dc472995e84048f86793b73ae3c2834a2d1637fe9d30f98bb410af0ec"`
[INFO] [stderr]    Compiling wee_alloc v0.4.4
[INFO] [stderr]    Compiling memory_units v0.4.0
[INFO] [stderr]    Compiling secp256k1 v0.12.2
[INFO] [stderr]    Compiling syn v0.15.42
[INFO] [stderr]    Compiling wasm-rpc v0.2.12
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/wasm-rpc-0.2.12/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | / #![feature(
[INFO] [stderr] 2 | |     set_stdio,
[INFO] [stderr] 3 | |     alloc_error_handler,
[INFO] [stderr] 4 | |     core_intrinsics,
[INFO] [stderr] 5 | |     panic_info_message,
[INFO] [stderr] 6 | |     try_trait
[INFO] [stderr] 7 | | )]
[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 `wasm-rpc`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "0bf5c64dc472995e84048f86793b73ae3c2834a2d1637fe9d30f98bb410af0ec"`
[INFO] running `"docker" "rm" "-f" "0bf5c64dc472995e84048f86793b73ae3c2834a2d1637fe9d30f98bb410af0ec"`
[INFO] [stdout] 0bf5c64dc472995e84048f86793b73ae3c2834a2d1637fe9d30f98bb410af0ec