[INFO] fetching crate prometheus-manager 0.0.30...
[INFO] checking prometheus-manager-0.0.30 against master#0f6e1ae67854c3c44726e8376144c16b465fe7c6 for pr-129392
[INFO] extracting crate prometheus-manager 0.0.30 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate prometheus-manager 0.0.30 on toolchain 0f6e1ae67854c3c44726e8376144c16b465fe7c6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate prometheus-manager 0.0.30
[INFO] finished tweaking crates.io crate prometheus-manager 0.0.30
[INFO] tweaked toml for crates.io crate prometheus-manager 0.0.30 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 73 packages to latest compatible versions
[INFO] [stderr]       Adding env_logger v0.10.2 (latest: v0.11.5)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.1.0)
[INFO] [stderr]       Adding rust-embed v6.8.1 (latest: v8.5.0)
[INFO] [stderr]       Adding rust-embed-impl v6.8.1 (latest: v8.5.0)
[INFO] [stderr]       Adding rust-embed-utils v7.8.1 (latest: v8.5.0)
[INFO] [stderr]       Adding windows-core v0.52.0 (latest: v0.58.0)
[INFO] [stderr]       Adding windows-sys v0.52.0 (latest: v0.59.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded human-readable v0.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0ba48e39d6a3aad4c3945e7d38410c73a673783dad8aa53d2ab5d8a371f49693
[INFO] running `Command { std: "docker" "start" "-a" "0ba48e39d6a3aad4c3945e7d38410c73a673783dad8aa53d2ab5d8a371f49693", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0ba48e39d6a3aad4c3945e7d38410c73a673783dad8aa53d2ab5d8a371f49693", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ba48e39d6a3aad4c3945e7d38410c73a673783dad8aa53d2ab5d8a371f49693", kill_on_drop: false }`
[INFO] [stdout] 0ba48e39d6a3aad4c3945e7d38410c73a673783dad8aa53d2ab5d8a371f49693
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 20800bc16eb8c29cdf2004962b545bd414423b914f391d5c942ad246575f0baa
[INFO] running `Command { std: "docker" "start" "-a" "20800bc16eb8c29cdf2004962b545bd414423b914f391d5c942ad246575f0baa", kill_on_drop: false }`
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking walkdir v2.5.0
[INFO] [stderr]     Checking unsafe-libyaml v0.2.11
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking human-readable v0.0.1
[INFO] [stderr]     Checking termcolor v1.4.1
[INFO] [stderr]     Checking is-terminal v0.4.13
[INFO] [stderr]     Checking chrono v0.4.38
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking rust-embed-utils v7.8.1
[INFO] [stderr]     Checking serde_yaml v0.9.34+deprecated
[INFO] [stderr]    Compiling rust-embed-impl v6.8.1
[INFO] [stderr]     Checking regex-automata v0.4.7
[INFO] [stderr]     Checking rust-embed v6.8.1
[INFO] [stderr]     Checking regex v1.10.6
[INFO] [stderr]     Checking env_logger v0.10.2
[INFO] [stderr]     Checking prometheus-manager v0.0.30 (/opt/rustwide/workdir)
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&Metric` instead of cloning the inner type
[INFO] [stdout]     --> src/lib.rs:3534:33
[INFO] [stdout]      |
[INFO] [stdout] 3534 |         assert_eq!(matched[i], v.clone(), "mismatched at {}", i);
[INFO] [stdout]      |                                 ^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.83s
[INFO] running `Command { std: "docker" "inspect" "20800bc16eb8c29cdf2004962b545bd414423b914f391d5c942ad246575f0baa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20800bc16eb8c29cdf2004962b545bd414423b914f391d5c942ad246575f0baa", kill_on_drop: false }`
[INFO] [stdout] 20800bc16eb8c29cdf2004962b545bd414423b914f391d5c942ad246575f0baa