[INFO] fetching crate libp2p-swarm 0.20.1...
[INFO] checking libp2p-swarm-0.20.1 against master#7b3a7819371cef92a187e9bac8f7810ccde15216 for pr-74846
[INFO] extracting crate libp2p-swarm 0.20.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate libp2p-swarm 0.20.1 on toolchain 7b3a7819371cef92a187e9bac8f7810ccde15216
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate libp2p-swarm 0.20.1
[INFO] finished tweaking crates.io crate libp2p-swarm 0.20.1
[INFO] tweaked toml for crates.io crate libp2p-swarm 0.20.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "fetch" "--locked" "--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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c80d18f38728fe2bc2bdfa951472298004f9247f0a249f8cfa6c4c65db5b9337
[INFO] running `Command { std: "docker" "start" "-a" "c80d18f38728fe2bc2bdfa951472298004f9247f0a249f8cfa6c4c65db5b9337", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c80d18f38728fe2bc2bdfa951472298004f9247f0a249f8cfa6c4c65db5b9337", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c80d18f38728fe2bc2bdfa951472298004f9247f0a249f8cfa6c4c65db5b9337", kill_on_drop: false }`
[INFO] [stdout] c80d18f38728fe2bc2bdfa951472298004f9247f0a249f8cfa6c4c65db5b9337
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 57313080a4bb41bb38c776ac7080df81afb8cb1f93b6789463121f47102f7738
[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" "57313080a4bb41bb38c776ac7080df81afb8cb1f93b6789463121f47102f7738", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking futures-sink v0.3.5
[INFO] [stderr]     Checking futures-io v0.3.5
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]    Compiling ring v0.16.15
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking sha-1 v0.8.2
[INFO] [stderr]     Checking futures-channel v0.3.5
[INFO] [stderr]     Checking multihash v0.11.2
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking parity-multiaddr v0.9.1
[INFO] [stderr]    Compiling prost-build v0.6.1
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking aho-corasick v0.7.13
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]    Compiling libp2p-core v0.20.1
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking quickcheck v0.9.2
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking multistream-select v0.8.2
[INFO] [stderr]     Checking rw-stream-sink v0.2.1
[INFO] [stderr]     Checking wasm-timer v0.2.4
[INFO] [stderr]     Checking libp2p-swarm v0.20.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `libp2p_mplex`
[INFO] [stdout]     --> src/lib.rs:1199:9
[INFO] [stdout]      |
[INFO] [stdout] 1199 |     use libp2p_mplex::Multiplex;
[INFO] [stdout]      |         ^^^^^^^^^^^^ use of undeclared type or module `libp2p_mplex`
[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 E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `libp2p-swarm`.
[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" "57313080a4bb41bb38c776ac7080df81afb8cb1f93b6789463121f47102f7738", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57313080a4bb41bb38c776ac7080df81afb8cb1f93b6789463121f47102f7738", kill_on_drop: false }`
[INFO] [stdout] 57313080a4bb41bb38c776ac7080df81afb8cb1f93b6789463121f47102f7738