[INFO] fetching crate metrics-prometheus-client 0.0.1...
[INFO] testing metrics-prometheus-client-0.0.1 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate metrics-prometheus-client 0.0.1 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate metrics-prometheus-client 0.0.1
[INFO] finished tweaking crates.io crate metrics-prometheus-client 0.0.1
[INFO] tweaked toml for crates.io crate metrics-prometheus-client 0.0.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate metrics-prometheus-client 0.0.1 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 25 packages to latest compatible versions
[INFO] [stderr]       Adding metrics v0.23.1 (available: v0.24.2)
[INFO] [stderr]       Adding prometheus-client v0.22.3 (available: v0.24.0)
[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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 027aa5eef4f60cc3d2ed93c841c8783df071aac2d393dc459125580e257fd728
[INFO] running `Command { std: "docker" "start" "-a" "027aa5eef4f60cc3d2ed93c841c8783df071aac2d393dc459125580e257fd728", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "027aa5eef4f60cc3d2ed93c841c8783df071aac2d393dc459125580e257fd728", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "027aa5eef4f60cc3d2ed93c841c8783df071aac2d393dc459125580e257fd728", kill_on_drop: false }`
[INFO] [stdout] 027aa5eef4f60cc3d2ed93c841c8783df071aac2d393dc459125580e257fd728
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 97732b72c5233767136bd4cb1ec623404fdbac1bc2ac08148de40832b8e3b677
[INFO] running `Command { std: "docker" "start" "-a" "97732b72c5233767136bd4cb1ec623404fdbac1bc2ac08148de40832b8e3b677", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.103
[INFO] [stderr]    Compiling libc v0.2.177
[INFO] [stderr]    Compiling unicode-ident v1.0.22
[INFO] [stderr]    Compiling cfg-if v1.0.4
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling version_check v0.9.5
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling zerocopy v0.8.27
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling prometheus-client v0.22.3
[INFO] [stderr]    Compiling once_cell v1.21.3
[INFO] [stderr]    Compiling itoa v1.0.15
[INFO] [stderr]    Compiling dtoa v1.0.10
[INFO] [stderr]    Compiling lock_api v0.4.14
[INFO] [stderr]    Compiling ahash v0.8.12
[INFO] [stderr]    Compiling syn v2.0.108
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling metrics v0.23.1
[INFO] [stderr]    Compiling prometheus-client-derive-encode v0.4.2
[INFO] [stderr]    Compiling metrics-prometheus-client v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.79s
[INFO] running `Command { std: "docker" "inspect" "97732b72c5233767136bd4cb1ec623404fdbac1bc2ac08148de40832b8e3b677", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97732b72c5233767136bd4cb1ec623404fdbac1bc2ac08148de40832b8e3b677", kill_on_drop: false }`
[INFO] [stdout] 97732b72c5233767136bd4cb1ec623404fdbac1bc2ac08148de40832b8e3b677
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 8b2052c5e3961f2bebd41020308910156f75a1edba26d65fd8b79eb149b1ccaa
[INFO] running `Command { std: "docker" "start" "-a" "8b2052c5e3961f2bebd41020308910156f75a1edba26d65fd8b79eb149b1ccaa", kill_on_drop: false }`
[INFO] [stderr]    Compiling metrics-prometheus-client v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `Command { std: "docker" "inspect" "8b2052c5e3961f2bebd41020308910156f75a1edba26d65fd8b79eb149b1ccaa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b2052c5e3961f2bebd41020308910156f75a1edba26d65fd8b79eb149b1ccaa", kill_on_drop: false }`
[INFO] [stdout] 8b2052c5e3961f2bebd41020308910156f75a1edba26d65fd8b79eb149b1ccaa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] b52a17c258e638582f1aa2589932e5f7d3149a2cd485c92759fcb11b89814201
[INFO] running `Command { std: "docker" "start" "-a" "b52a17c258e638582f1aa2589932e5f7d3149a2cd485c92759fcb11b89814201", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/metrics_prometheus_client-84f67b8cb3fd90b2)
[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] [stderr]    Doc-tests metrics_prometheus_client
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - ReadmeDoctests (line 21) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.30s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b52a17c258e638582f1aa2589932e5f7d3149a2cd485c92759fcb11b89814201", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b52a17c258e638582f1aa2589932e5f7d3149a2cd485c92759fcb11b89814201", kill_on_drop: false }`
[INFO] [stdout] b52a17c258e638582f1aa2589932e5f7d3149a2cd485c92759fcb11b89814201