[INFO] fetching crate serde_prometheus_labels 0.2.0...
[INFO] testing serde_prometheus_labels-0.2.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate serde_prometheus_labels 0.2.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate serde_prometheus_labels 0.2.0
[INFO] finished tweaking crates.io crate serde_prometheus_labels 0.2.0
[INFO] tweaked toml for crates.io crate serde_prometheus_labels 0.2.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate serde_prometheus_labels 0.2.0 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "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-2026-04-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 23 packages to latest compatible versions
[INFO] [stderr]       Adding prometheus-client v0.18.1 (available: v0.24.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5b7dd915e3071a1511d1449e3dd28a7b18ac7de5ddf6e27f383696bf72a4137e
[INFO] running `Command { std: "docker" "start" "-a" "5b7dd915e3071a1511d1449e3dd28a7b18ac7de5ddf6e27f383696bf72a4137e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5b7dd915e3071a1511d1449e3dd28a7b18ac7de5ddf6e27f383696bf72a4137e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b7dd915e3071a1511d1449e3dd28a7b18ac7de5ddf6e27f383696bf72a4137e", kill_on_drop: false }`
[INFO] [stdout] 5b7dd915e3071a1511d1449e3dd28a7b18ac7de5ddf6e27f383696bf72a4137e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1cb3f1b5c04d4d30a46b5c4abe021cf4b1222f6cb27e23b55976a14664334618
[INFO] running `Command { std: "docker" "start" "-a" "1cb3f1b5c04d4d30a46b5c4abe021cf4b1222f6cb27e23b55976a14664334618", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling ryu v1.0.23
[INFO] [stderr]    Compiling itoa v1.0.18
[INFO] [stderr]    Compiling serde_prometheus_labels v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `Command { std: "docker" "inspect" "1cb3f1b5c04d4d30a46b5c4abe021cf4b1222f6cb27e23b55976a14664334618", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1cb3f1b5c04d4d30a46b5c4abe021cf4b1222f6cb27e23b55976a14664334618", kill_on_drop: false }`
[INFO] [stdout] 1cb3f1b5c04d4d30a46b5c4abe021cf4b1222f6cb27e23b55976a14664334618
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 75ac0985de66921396c2f7045b354ccebc8640310e36e9d36c3c3dd8a0509a7d
[INFO] running `Command { std: "docker" "start" "-a" "75ac0985de66921396c2f7045b354ccebc8640310e36e9d36c3c3dd8a0509a7d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling serde_prometheus_labels v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 7.76s
[INFO] running `Command { std: "docker" "inspect" "75ac0985de66921396c2f7045b354ccebc8640310e36e9d36c3c3dd8a0509a7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75ac0985de66921396c2f7045b354ccebc8640310e36e9d36c3c3dd8a0509a7d", kill_on_drop: false }`
[INFO] [stdout] 75ac0985de66921396c2f7045b354ccebc8640310e36e9d36c3c3dd8a0509a7d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a0aa7a4863dba054ae12d7380b76d67d2cfceb7e6dc33e43b44b8c71aa005d54
[INFO] running `Command { std: "docker" "start" "-a" "a0aa7a4863dba054ae12d7380b76d67d2cfceb7e6dc33e43b44b8c71aa005d54", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running tests/tests.rs (/opt/rustwide/target/debug/deps/tests-a35f5089ed3d4e06)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test invalid_key ... ok
[INFO] [stdout] test escapes ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests serde_prometheus_labels
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs - to_vec (line 89) ... ok
[INFO] [stdout] test src/lib.rs - to_string (line 52) ... ok
[INFO] [stdout] test src/lib.rs - to_string (line 24) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.37s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a0aa7a4863dba054ae12d7380b76d67d2cfceb7e6dc33e43b44b8c71aa005d54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0aa7a4863dba054ae12d7380b76d67d2cfceb7e6dc33e43b44b8c71aa005d54", kill_on_drop: false }`
[INFO] [stdout] a0aa7a4863dba054ae12d7380b76d67d2cfceb7e6dc33e43b44b8c71aa005d54
