[INFO] fetching crate riker-deadletter 0.2.4...
[INFO] testing riker-deadletter-0.2.4 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate riker-deadletter 0.2.4 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate riker-deadletter 0.2.4 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate riker-deadletter 0.2.4
[INFO] finished tweaking crates.io crate riker-deadletter 0.2.4
[INFO] tweaked toml for crates.io crate riker-deadletter 0.2.4 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 54b4d34e8060393db9f28a3ec2a68b7564722992fd78d0b34e55ce4e37b00f9c
[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" "54b4d34e8060393db9f28a3ec2a68b7564722992fd78d0b34e55ce4e37b00f9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "54b4d34e8060393db9f28a3ec2a68b7564722992fd78d0b34e55ce4e37b00f9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54b4d34e8060393db9f28a3ec2a68b7564722992fd78d0b34e55ce4e37b00f9c", kill_on_drop: false }`
[INFO] [stdout] 54b4d34e8060393db9f28a3ec2a68b7564722992fd78d0b34e55ce4e37b00f9c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "RUSTFLAGS=--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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1e04bb0b114a995a5ce434610ba3858b62ebaf2c5bca3dab9cfb63fac3abf827
[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" "1e04bb0b114a995a5ce434610ba3858b62ebaf2c5bca3dab9cfb63fac3abf827", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling serde v0.8.23
[INFO] [stderr]    Compiling futures-io-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling rust-ini v0.13.0
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling serde_test v0.8.23
[INFO] [stderr]    Compiling linked-hash-map v0.3.0
[INFO] [stderr]    Compiling serde-hjson v0.8.2
[INFO] [stderr]    Compiling futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling config v0.9.3
[INFO] [stderr]    Compiling futures-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling 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" "1e04bb0b114a995a5ce434610ba3858b62ebaf2c5bca3dab9cfb63fac3abf827", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e04bb0b114a995a5ce434610ba3858b62ebaf2c5bca3dab9cfb63fac3abf827", kill_on_drop: false }`
[INFO] [stdout] 1e04bb0b114a995a5ce434610ba3858b62ebaf2c5bca3dab9cfb63fac3abf827