[INFO] fetching crate coap 0.11.3...
[INFO] testing coap-0.11.3 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate coap 0.11.3 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate coap 0.11.3 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate coap 0.11.3
[INFO] finished tweaking crates.io crate coap 0.11.3
[INFO] tweaked toml for crates.io crate coap 0.11.3 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate coap 0.11.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 10e07040796efb54102b46589d7cd56c987f742a475a54ed22b10dcc59d3375a
[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" "10e07040796efb54102b46589d7cd56c987f742a475a54ed22b10dcc59d3375a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "10e07040796efb54102b46589d7cd56c987f742a475a54ed22b10dcc59d3375a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10e07040796efb54102b46589d7cd56c987f742a475a54ed22b10dcc59d3375a", kill_on_drop: false }`
[INFO] [stdout] 10e07040796efb54102b46589d7cd56c987f742a475a54ed22b10dcc59d3375a
[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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a66ff6ff430bb99fbf79ddba5e97d8dbe618c66ab4af4ce6d416913896465ce2
[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" "a66ff6ff430bb99fbf79ddba5e97d8dbe618c66ab4af4ce6d416913896465ce2", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling parking_lot_core v0.8.4
[INFO] [stderr]    Compiling serde v1.0.103
[INFO] [stderr]    Compiling coap-lite v0.7.0
[INFO] [stderr]    Compiling tokio v1.11.0
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling unicode-normalization v0.1.19
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling signal-hook-registry v1.2.0
[INFO] [stderr]    Compiling mio v0.7.13
[INFO] [stderr]    Compiling num_cpus v1.11.1
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling url v2.2.2
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling tokio-macros v1.2.0
[INFO] [stderr]    Compiling serde_derive v1.0.103
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]    Compiling futures-util v0.3.1
[INFO] [stderr]    Compiling futures-executor v0.3.1
[INFO] [stderr]    Compiling futures v0.3.1
[INFO] [stderr]    Compiling tokio-util v0.6.7
[INFO] [stderr]    Compiling tokio-stream v0.1.6
[INFO] [stderr]    Compiling coap v0.11.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 36.65s
[INFO] running `Command { std: "docker" "inspect" "a66ff6ff430bb99fbf79ddba5e97d8dbe618c66ab4af4ce6d416913896465ce2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a66ff6ff430bb99fbf79ddba5e97d8dbe618c66ab4af4ce6d416913896465ce2", kill_on_drop: false }`
[INFO] [stdout] a66ff6ff430bb99fbf79ddba5e97d8dbe618c66ab4af4ce6d416913896465ce2
[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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 36d009ede3a951896a40c9e79dead170f45c033c937a8e865d58dc8e3325309e
[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" "36d009ede3a951896a40c9e79dead170f45c033c937a8e865d58dc8e3325309e", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling quickcheck v0.8.5
[INFO] [stderr]    Compiling coap v0.11.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> examples/server.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(async_closure)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `coap` due to 2 previous errors
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> examples/client_and_server.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(async_closure)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "36d009ede3a951896a40c9e79dead170f45c033c937a8e865d58dc8e3325309e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36d009ede3a951896a40c9e79dead170f45c033c937a8e865d58dc8e3325309e", kill_on_drop: false }`
[INFO] [stdout] 36d009ede3a951896a40c9e79dead170f45c033c937a8e865d58dc8e3325309e