[INFO] crate sonm 0.1.0 is already in cache
[INFO] extracting crate sonm 0.1.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/sonm/0.1.0
[INFO] extracting crate sonm 0.1.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/sonm/0.1.0
[INFO] validating manifest of sonm-0.1.0 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 sonm-0.1.0 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 sonm-0.1.0
[INFO] finished frobbing sonm-0.1.0
[INFO] frobbed toml for sonm-0.1.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/sonm/0.1.0/Cargo.toml
[INFO] started frobbing sonm-0.1.0
[INFO] finished frobbing sonm-0.1.0
[INFO] frobbed toml for sonm-0.1.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/sonm/0.1.0/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 sonm-0.1.0 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/sonm/0.1.0:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] e8a768eccd67b246deeca2d525073d53c112820d281608e2e97339d8210f7569
[INFO] running `"docker" "start" "-a" "e8a768eccd67b246deeca2d525073d53c112820d281608e2e97339d8210f7569"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]    Compiling futures-await-await-macro v0.1.1
[INFO] [stderr]    Compiling v_escape v0.7.2
[INFO] [stderr]    Compiling actix-web v0.7.19
[INFO] [stderr]    Compiling ring v0.13.5
[INFO] [stderr]    Compiling tower-service v0.1.0
[INFO] [stderr]    Compiling secp256k1 v0.8.5
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling uint v0.2.1
[INFO] [stderr]    Compiling ethereum-types v0.3.2
[INFO] [stderr]    Compiling socket2 v0.3.10
[INFO] [stderr]    Compiling brotli-sys v0.3.2
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling fixed-hash v0.2.5
[INFO] [stderr]    Compiling syn v0.15.42
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling flate2 v1.0.9
[INFO] [stderr]    Compiling brotli2 v0.3.2
[INFO] [stderr]    Compiling ethbloom v0.5.3
[INFO] [stderr]    Compiling h2 v0.1.26
[INFO] [stderr]    Compiling tokio-reactor v0.1.9
[INFO] [stderr]    Compiling tokio-fs v0.1.6
[INFO] [stderr]    Compiling serde_urlencoded v0.5.5
[INFO] [stderr]    Compiling tokio-udp v0.1.3
[INFO] [stderr]    Compiling tokio-uds v0.2.5
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling tokio-signal v0.2.7
[INFO] [stderr]    Compiling cookie v0.11.1
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling futures-await-async-macro v0.1.4
[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/futures-await-async-macro-0.1.4/src/lib.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | #![feature(proc_macro)]
[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 `futures-await-async-macro`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "e8a768eccd67b246deeca2d525073d53c112820d281608e2e97339d8210f7569"`
[INFO] running `"docker" "rm" "-f" "e8a768eccd67b246deeca2d525073d53c112820d281608e2e97339d8210f7569"`
[INFO] [stdout] e8a768eccd67b246deeca2d525073d53c112820d281608e2e97339d8210f7569