[INFO] updating cached repository aknuds1/decentralized-meetup
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/aknuds1/decentralized-meetup
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/aknuds1/decentralized-meetup" "work/ex/beta-1.38-1/sources/1.37.0/gh/aknuds1/decentralized-meetup"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/aknuds1/decentralized-meetup'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/aknuds1/decentralized-meetup" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/aknuds1/decentralized-meetup"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/aknuds1/decentralized-meetup'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 602b627f32c04b47ce6be8a1562e42bb8a628cb2
[INFO] sha for GitHub repo aknuds1/decentralized-meetup: 602b627f32c04b47ce6be8a1562e42bb8a628cb2
[INFO] validating manifest of aknuds1/decentralized-meetup 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 aknuds1/decentralized-meetup 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 aknuds1/decentralized-meetup
[INFO] finished frobbing aknuds1/decentralized-meetup
[INFO] frobbed toml for aknuds1/decentralized-meetup written to work/ex/beta-1.38-1/sources/1.37.0/gh/aknuds1/decentralized-meetup/Cargo.toml
[INFO] started frobbing aknuds1/decentralized-meetup
[INFO] finished frobbing aknuds1/decentralized-meetup
[INFO] frobbed toml for aknuds1/decentralized-meetup written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/aknuds1/decentralized-meetup/Cargo.toml
[INFO] crate aknuds1/decentralized-meetup 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 aknuds1/decentralized-meetup 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/aknuds1/decentralized-meetup:/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] 091bfcbe86284718861e18c5a2178162c159833d915ed836e8074dc60be6b185
[INFO] running `"docker" "start" "-a" "091bfcbe86284718861e18c5a2178162c159833d915ed836e8074dc60be6b185"`
[INFO] [stderr]    Compiling futures-core-preview v0.3.0-alpha.15
[INFO] [stderr]    Compiling pin-utils v0.1.0-alpha.4
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling serde v1.0.90
[INFO] [stderr]    Compiling slog v2.4.1
[INFO] [stderr]    Compiling bitflags v1.0.5
[INFO] [stderr]    Compiling take_mut v0.2.2
[INFO] [stderr]    Compiling route-recognizer v0.1.12
[INFO] [stderr]    Compiling literalext v0.1.1
[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/literalext-0.1.1/src/lib.rs:19:37
[INFO] [stderr]    |
[INFO] [stderr] 19 | #![cfg_attr(feature = "proc-macro", 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 `literalext`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "091bfcbe86284718861e18c5a2178162c159833d915ed836e8074dc60be6b185"`
[INFO] running `"docker" "rm" "-f" "091bfcbe86284718861e18c5a2178162c159833d915ed836e8074dc60be6b185"`
[INFO] [stdout] 091bfcbe86284718861e18c5a2178162c159833d915ed836e8074dc60be6b185