[INFO] fetching crate unicom-tcp 0.1.1...
[INFO] checking unicom-tcp-0.1.1 against try#15a786332e2f0dd343b226ab6bb8ec028a350f73 for pr-81782
[INFO] extracting crate unicom-tcp 0.1.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate unicom-tcp 0.1.1 on toolchain 15a786332e2f0dd343b226ab6bb8ec028a350f73
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate unicom-tcp 0.1.1
[INFO] finished tweaking crates.io crate unicom-tcp 0.1.1
[INFO] tweaked toml for crates.io crate unicom-tcp 0.1.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded async-attributes v1.1.2
[INFO] [stderr]   Downloaded trust-dns-proto v0.19.6
[INFO] [stderr]   Downloaded trust-dns-resolver v0.19.6
[INFO] [stderr]   Downloaded async-std-resolver v0.19.6
[INFO] [stderr]   Downloaded resolv-conf v0.7.0
[INFO] [stderr]   Downloaded unicom-nres v0.1.1
[INFO] [stderr]   Downloaded unicom v0.1.1
[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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3d044b433334aba2adf8084e5ba80d1a514e516f9f6e4e1f8dbb48de9e81acbd
[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" "3d044b433334aba2adf8084e5ba80d1a514e516f9f6e4e1f8dbb48de9e81acbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3d044b433334aba2adf8084e5ba80d1a514e516f9f6e4e1f8dbb48de9e81acbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d044b433334aba2adf8084e5ba80d1a514e516f9f6e4e1f8dbb48de9e81acbd", kill_on_drop: false }`
[INFO] [stdout] 3d044b433334aba2adf8084e5ba80d1a514e516f9f6e4e1f8dbb48de9e81acbd
[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=forbid" "-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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b10d807829d39abfb52aaea15e6758a073d8445ceb602720c094fa829b5be88c
[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" "b10d807829d39abfb52aaea15e6758a073d8445ceb602720c094fa829b5be88c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling crossbeam-utils v0.8.3
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking nb-connect v1.0.3
[INFO] [stderr]     Checking futures-lite v1.11.3
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]     Checking async-executor v1.4.0
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]    Compiling ctor v0.1.19
[INFO] [stderr]    Compiling tokio-macros v0.2.6
[INFO] [stderr]    Compiling async-attributes v1.1.2
[INFO] [stderr]     Checking value-bag v1.0.0-alpha.6
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking polling v2.0.2
[INFO] [stderr]     Checking unicom v0.1.1
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stdout] error: Either of features should be selected: futures, tokio, async-std
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/unicom-0.1.1/src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | compile_error!("Either of features should be selected: futures, tokio, async-std");
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `unicom`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "b10d807829d39abfb52aaea15e6758a073d8445ceb602720c094fa829b5be88c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b10d807829d39abfb52aaea15e6758a073d8445ceb602720c094fa829b5be88c", kill_on_drop: false }`
[INFO] [stdout] b10d807829d39abfb52aaea15e6758a073d8445ceb602720c094fa829b5be88c