[INFO] fetching crate libp2p-metrics 0.14.1...
[INFO] checking libp2p-metrics-0.14.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate libp2p-metrics 0.14.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate libp2p-metrics 0.14.1 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate libp2p-metrics 0.14.1
[INFO] finished tweaking crates.io crate libp2p-metrics 0.14.1
[INFO] tweaked toml for crates.io crate libp2p-metrics 0.14.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 149 packages
[INFO] [stderr]       Adding asynchronous-codec v0.6.2 (latest: v0.7.0)
[INFO] [stderr]       Adding base64 v0.21.7 (latest: v0.22.0)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding lru v0.11.1 (latest: v0.12.3)
[INFO] [stderr]       Adding quick-protobuf-codec v0.2.0 (latest: v0.3.1)
[INFO] [stderr]       Adding redox_syscall v0.4.1 (latest: v0.5.1)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding unsigned-varint v0.7.2 (latest: v0.8.0)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] [stderr]       Adding windows-targets v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_msvc v0.48.5 (latest: v0.52.4)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libp2p-identity v0.2.8
[INFO] [stderr]   Downloaded asynchronous-codec v0.6.2
[INFO] [stderr]   Downloaded unsigned-varint v0.7.2
[INFO] [stderr]   Downloaded prometheus-client-derive-encode v0.4.2
[INFO] [stderr]   Downloaded futures-bounded v0.2.3
[INFO] [stderr]   Downloaded rw-stream-sink v0.4.0
[INFO] [stderr]   Downloaded libp2p-ping v0.44.0
[INFO] [stderr]   Downloaded quick-protobuf-codec v0.2.0
[INFO] [stderr]   Downloaded quick-protobuf-codec v0.3.1
[INFO] [stderr]   Downloaded multistream-select v0.13.0
[INFO] [stderr]   Downloaded libp2p-dcutr v0.11.0
[INFO] [stderr]   Downloaded futures-ticker v0.0.3
[INFO] [stderr]   Downloaded libp2p-gossipsub v0.46.1
[INFO] [stderr]   Downloaded libp2p-kad v0.45.3
[INFO] [stderr]   Downloaded lru v0.12.3
[INFO] [stderr]   Downloaded libp2p-identify v0.44.1
[INFO] [stderr]   Downloaded asynchronous-codec v0.7.0
[INFO] [stderr]   Downloaded libp2p-relay v0.17.1
[INFO] [stderr]   Downloaded multiaddr v0.18.1
[INFO] [stderr]   Downloaded unsigned-varint v0.8.0
[INFO] [stderr]   Downloaded libp2p-core v0.41.2
[INFO] [stderr]   Downloaded core2 v0.4.0
[INFO] [stderr]   Downloaded multihash v0.19.1
[INFO] [stderr]   Downloaded quick-protobuf v0.8.1
[INFO] [stderr]   Downloaded libp2p-swarm v0.44.1
[INFO] [stderr]   Downloaded dtoa v1.0.9
[INFO] [stderr]   Downloaded prometheus-client v0.22.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0eaa84b412261c86b53c8f1aaf88ce6564c5c01aeafb55e1821d2d23e5e55f6a
[INFO] running `Command { std: "docker" "start" "-a" "0eaa84b412261c86b53c8f1aaf88ce6564c5c01aeafb55e1821d2d23e5e55f6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0eaa84b412261c86b53c8f1aaf88ce6564c5c01aeafb55e1821d2d23e5e55f6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0eaa84b412261c86b53c8f1aaf88ce6564c5c01aeafb55e1821d2d23e5e55f6a", kill_on_drop: false }`
[INFO] [stdout] 0eaa84b412261c86b53c8f1aaf88ce6564c5c01aeafb55e1821d2d23e5e55f6a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0d3a67c9a0c476bca2b559cd25785fe112b6789fde2f1c6e9d1b08c68cf23ba5
[INFO] running `Command { std: "docker" "start" "-a" "0d3a67c9a0c476bca2b559cd25785fe112b6789fde2f1c6e9d1b08c68cf23ba5", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.22
[INFO] [stderr]     Checking subtle v2.5.0
[INFO] [stderr]     Checking futures-sink v0.3.30
[INFO] [stderr]    Compiling platforms v3.4.0
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]     Checking futures-task v0.3.30
[INFO] [stderr]     Checking unsigned-varint v0.7.2
[INFO] [stderr]     Checking signature v2.2.0
[INFO] [stderr]     Checking zeroize v1.7.0
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling data-encoding v2.5.0
[INFO] [stderr]     Checking core2 v0.4.0
[INFO] [stderr]     Checking quick-protobuf v0.8.1
[INFO] [stderr]     Checking base-x v0.2.11
[INFO] [stderr]     Checking ed25519 v2.2.3
[INFO] [stderr]     Checking bs58 v0.5.1
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking url v2.5.0
[INFO] [stderr]     Checking multihash v0.19.1
[INFO] [stderr]     Checking arrayref v0.3.7
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]     Checking unsigned-varint v0.8.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling prometheus-client v0.22.2
[INFO] [stderr]     Checking futures-timer v3.0.3
[INFO] [stderr]     Checking dtoa v1.0.9
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling curve25519-dalek v4.1.2
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking hmac v0.12.1
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking hkdf v0.12.4
[INFO] [stderr]    Compiling data-encoding-macro-internal v0.1.12
[INFO] [stderr]     Checking data-encoding-macro v0.1.14
[INFO] [stderr]     Checking multibase v0.9.1
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling curve25519-dalek-derive v0.1.1
[INFO] [stderr]    Compiling pin-project-internal v1.1.5
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]    Compiling prometheus-client-derive-encode v0.4.2
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking pin-project v1.1.5
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]     Checking ed25519-dalek v2.1.1
[INFO] [stderr]     Checking libp2p-identity v0.2.8
[INFO] [stderr]     Checking multiaddr v0.18.1
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking multistream-select v0.13.0
[INFO] [stderr]     Checking rw-stream-sink v0.4.0
[INFO] [stderr]     Checking libp2p-core v0.41.2
[INFO] [stderr]     Checking libp2p-swarm v0.44.1
[INFO] [stderr]     Checking libp2p-metrics v0.14.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 21.33s
[INFO] running `Command { std: "docker" "inspect" "0d3a67c9a0c476bca2b559cd25785fe112b6789fde2f1c6e9d1b08c68cf23ba5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d3a67c9a0c476bca2b559cd25785fe112b6789fde2f1c6e9d1b08c68cf23ba5", kill_on_drop: false }`
[INFO] [stdout] 0d3a67c9a0c476bca2b559cd25785fe112b6789fde2f1c6e9d1b08c68cf23ba5