[INFO] fetching crate riker-cqrs 0.2.3...
[INFO] documenting riker-cqrs-0.2.3 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate riker-cqrs 0.2.3 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate riker-cqrs 0.2.3 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate riker-cqrs 0.2.3
[INFO] finished tweaking crates.io crate riker-cqrs 0.2.3
[INFO] tweaked toml for crates.io crate riker-cqrs 0.2.3 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 600d3ea79b548ba94cac1616f906e3cad2b900e1f9e2915515f47571df9a9d13
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "600d3ea79b548ba94cac1616f906e3cad2b900e1f9e2915515f47571df9a9d13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "600d3ea79b548ba94cac1616f906e3cad2b900e1f9e2915515f47571df9a9d13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "600d3ea79b548ba94cac1616f906e3cad2b900e1f9e2915515f47571df9a9d13", kill_on_drop: false }`
[INFO] [stdout] 600d3ea79b548ba94cac1616f906e3cad2b900e1f9e2915515f47571df9a9d13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d64bf4489465c2c44919a5db22e779a16b097f79fd9be775293e6aef59befee5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d64bf4489465c2c44919a5db22e779a16b097f79fd9be775293e6aef59befee5", kill_on_drop: false }`
[INFO] [stderr]     Checking riker v0.2.4
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/riker-0.2.4/src/lib.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |         await_macro,
[INFO] [stdout]   |         ^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: subsumed by `.await` syntax
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: incorrect use of `await`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/riker-0.2.4/src/kernel/kernel.rs:257:29
[INFO] [stdout]     |
[INFO] [stdout] 257 |                     let _ = await!(AssertUnwindSafe(f).catch_unwind());
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: `await` is a postfix operation: `AssertUnwindSafe(f).catch_unwind().await`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/riker-0.2.4/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | / #![feature(
[INFO] [stdout] 3 | |         async_await,
[INFO] [stdout] 4 | |         await_macro,
[INFO] [stdout] 5 | |         futures_api,
[INFO] [stdout] 6 | |         arbitrary_self_types
[INFO] [stdout] 7 | | )]
[INFO] [stdout]   | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `riker`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "d64bf4489465c2c44919a5db22e779a16b097f79fd9be775293e6aef59befee5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d64bf4489465c2c44919a5db22e779a16b097f79fd9be775293e6aef59befee5", kill_on_drop: false }`
[INFO] [stdout] d64bf4489465c2c44919a5db22e779a16b097f79fd9be775293e6aef59befee5