[INFO] fetching crate metrics-observer-prometheus 0.1.4...
[INFO] testing metrics-observer-prometheus-0.1.4 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate metrics-observer-prometheus 0.1.4 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate metrics-observer-prometheus 0.1.4
[INFO] finished tweaking crates.io crate metrics-observer-prometheus 0.1.4
[INFO] tweaked toml for crates.io crate metrics-observer-prometheus 0.1.4 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate metrics-observer-prometheus 0.1.4 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 20 packages to latest compatible versions
[INFO] [stderr]       Adding hdrhistogram v6.3.4 (available: v7.5.4)
[INFO] [stderr]       Adding metrics-util v0.3.2 (available: v0.20.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 00b1792d90c24088f219eb8b027b07ebe3427d43514c06fbbf615801c7edc46e
[INFO] running `Command { std: "docker" "start" "-a" "00b1792d90c24088f219eb8b027b07ebe3427d43514c06fbbf615801c7edc46e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "00b1792d90c24088f219eb8b027b07ebe3427d43514c06fbbf615801c7edc46e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00b1792d90c24088f219eb8b027b07ebe3427d43514c06fbbf615801c7edc46e", kill_on_drop: false }`
[INFO] [stdout] 00b1792d90c24088f219eb8b027b07ebe3427d43514c06fbbf615801c7edc46e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6db6e178bab681350b152e592d7db66c1a03fd5a7cbb87ff8bcbe3817c1107c7
[INFO] running `Command { std: "docker" "start" "-a" "6db6e178bab681350b152e592d7db66c1a03fd5a7cbb87ff8bcbe3817c1107c7", kill_on_drop: false }`
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling metrics-core v0.5.2
[INFO] [stderr]    Compiling hdrhistogram v6.3.4
[INFO] [stderr]    Compiling metrics-util v0.3.2
[INFO] [stderr]    Compiling metrics-observer-prometheus v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.72s
[INFO] running `Command { std: "docker" "inspect" "6db6e178bab681350b152e592d7db66c1a03fd5a7cbb87ff8bcbe3817c1107c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6db6e178bab681350b152e592d7db66c1a03fd5a7cbb87ff8bcbe3817c1107c7", kill_on_drop: false }`
[INFO] [stdout] 6db6e178bab681350b152e592d7db66c1a03fd5a7cbb87ff8bcbe3817c1107c7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4a6c4ac6b49185d930c02315f328cdc929d8e47b4849114c33125e64ed4d60d1
[INFO] running `Command { std: "docker" "start" "-a" "4a6c4ac6b49185d930c02315f328cdc929d8e47b4849114c33125e64ed4d60d1", kill_on_drop: false }`
[INFO] [stderr]    Compiling metrics-observer-prometheus v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "4a6c4ac6b49185d930c02315f328cdc929d8e47b4849114c33125e64ed4d60d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a6c4ac6b49185d930c02315f328cdc929d8e47b4849114c33125e64ed4d60d1", kill_on_drop: false }`
[INFO] [stdout] 4a6c4ac6b49185d930c02315f328cdc929d8e47b4849114c33125e64ed4d60d1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 80f3ad251249c5dba952d29e1365a49b6b8274ee50b0754299b0a8f319b2c42a
[INFO] running `Command { std: "docker" "start" "-a" "80f3ad251249c5dba952d29e1365a49b6b8274ee50b0754299b0a8f319b2c42a", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/metrics_observer_prometheus-3a8a661b9adbdd19)
[INFO] [stderr]    Doc-tests metrics_observer_prometheus
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "80f3ad251249c5dba952d29e1365a49b6b8274ee50b0754299b0a8f319b2c42a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80f3ad251249c5dba952d29e1365a49b6b8274ee50b0754299b0a8f319b2c42a", kill_on_drop: false }`
[INFO] [stdout] 80f3ad251249c5dba952d29e1365a49b6b8274ee50b0754299b0a8f319b2c42a