[INFO] updating cached repository langdev/rendezvous
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/langdev/rendezvous
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/langdev/rendezvous" "work/ex/beta-1.38-1/sources/1.37.0/gh/langdev/rendezvous"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/langdev/rendezvous'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/langdev/rendezvous" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/langdev/rendezvous"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/langdev/rendezvous'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1180e29c512ca1a2cc09e8f5a2541bd604d85fc4
[INFO] sha for GitHub repo langdev/rendezvous: 1180e29c512ca1a2cc09e8f5a2541bd604d85fc4
[INFO] validating manifest of langdev/rendezvous 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 langdev/rendezvous 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 langdev/rendezvous
[INFO] finished frobbing langdev/rendezvous
[INFO] frobbed toml for langdev/rendezvous written to work/ex/beta-1.38-1/sources/1.37.0/gh/langdev/rendezvous/Cargo.toml
[INFO] started frobbing langdev/rendezvous
[INFO] finished frobbing langdev/rendezvous
[INFO] frobbed toml for langdev/rendezvous written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/langdev/rendezvous/Cargo.toml
[INFO] crate langdev/rendezvous 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 langdev/rendezvous 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/langdev/rendezvous:/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] 2c6e6e79ec3f977827d2051e8b0a6d0274dc295666e8eac361ea8eead59b1c8a
[INFO] running `"docker" "start" "-a" "2c6e6e79ec3f977827d2051e8b0a6d0274dc295666e8eac361ea8eead59b1c8a"`
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[INFO] [stderr]    Compiling tokio-io v0.1.12
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[INFO] [stderr]    Compiling hyper v0.10.15
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[INFO] [stderr]    Compiling tokio-uds v0.2.5
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[INFO] [stderr]    Compiling tokio v0.1.17
[INFO] [stderr]    Compiling tokio-tls v0.2.1
[INFO] [stderr]    Compiling native-tls v0.1.5
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling darling_core v0.8.5
[INFO] [stderr]    Compiling actix_derive v0.3.2
[INFO] [stderr]    Compiling serde_derive v1.0.89
[INFO] [stderr]    Compiling actix_derive v0.4.0
[INFO] [stderr]    Compiling tokio-core v0.1.17
[INFO] [stderr]    Compiling evzht9h3nznqzwl v0.0.3
[INFO] [stderr]    Compiling multipart v0.13.6
[INFO] [stderr]    Compiling hyper-native-tls v0.2.4
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling darling_macro v0.8.5
[INFO] [stderr]    Compiling trust-dns-proto v0.6.3
[INFO] [stderr]    Compiling trust-dns-proto v0.5.0
[INFO] [stderr]    Compiling darling v0.8.5
[INFO] [stderr]    Compiling derive_builder_core v0.4.1
[INFO] [stderr]    Compiling serenity v0.5.10
[INFO] [stderr]    Compiling irc v0.13.6
[INFO] [stderr]    Compiling trust-dns-resolver v0.10.3
[INFO] [stderr]    Compiling actix v0.7.9
[INFO] [stderr]    Compiling rendezvous v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(async_await, await_macro)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(arbitrary_self_types, fn_traits, unboxed_closures)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | #![feature(termination_trait_lib)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `rendezvous`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "2c6e6e79ec3f977827d2051e8b0a6d0274dc295666e8eac361ea8eead59b1c8a"`
[INFO] running `"docker" "rm" "-f" "2c6e6e79ec3f977827d2051e8b0a6d0274dc295666e8eac361ea8eead59b1c8a"`
[INFO] [stdout] 2c6e6e79ec3f977827d2051e8b0a6d0274dc295666e8eac361ea8eead59b1c8a