[INFO] fetching crate metrics-recorder-prometheus 0.2.3... [INFO] testing metrics-recorder-prometheus-0.2.3 against beta-2025-09-21 for beta-1.91-3 [INFO] extracting crate metrics-recorder-prometheus 0.2.3 into /workspace/builds/worker-3-tc2/source [INFO] started tweaking crates.io crate metrics-recorder-prometheus 0.2.3 [INFO] finished tweaking crates.io crate metrics-recorder-prometheus 0.2.3 [INFO] tweaked toml for crates.io crate metrics-recorder-prometheus 0.2.3 written to /workspace/builds/worker-3-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate metrics-recorder-prometheus 0.2.3 on toolchain beta-2025-09-21 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "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-2025-09-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 25 packages to latest compatible versions [INFO] [stderr] Adding hdrhistogram v6.3.4 (available: v7.5.4) [INFO] [stderr] Adding metrics-core v0.4.0 (available: v0.5.2) [INFO] [stderr] Adding metrics-util v0.2.1 (available: v0.20.0) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] fa5aa3f9258d2884f6c993d1dc9cfd63488c47195e2e87e808ff7ba4de56dd00 [INFO] running `Command { std: "docker" "start" "-a" "fa5aa3f9258d2884f6c993d1dc9cfd63488c47195e2e87e808ff7ba4de56dd00", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "fa5aa3f9258d2884f6c993d1dc9cfd63488c47195e2e87e808ff7ba4de56dd00", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "fa5aa3f9258d2884f6c993d1dc9cfd63488c47195e2e87e808ff7ba4de56dd00", kill_on_drop: false }` [INFO] [stdout] fa5aa3f9258d2884f6c993d1dc9cfd63488c47195e2e87e808ff7ba4de56dd00 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 6af7c228856e6197926e571a85157c368b81cf28f36354daad43ceeb31760b27 [INFO] running `Command { std: "docker" "start" "-a" "6af7c228856e6197926e571a85157c368b81cf28f36354daad43ceeb31760b27", kill_on_drop: false }` [INFO] [stderr] Compiling cfg-if v0.1.10 [INFO] [stderr] Compiling memoffset v0.5.6 [INFO] [stderr] Compiling arrayvec v0.4.12 [INFO] [stderr] Compiling version_check v0.1.5 [INFO] [stderr] Compiling crc32fast v1.5.0 [INFO] [stderr] Compiling adler2 v2.0.1 [INFO] [stderr] Compiling nodrop v0.1.14 [INFO] [stderr] Compiling memchr v2.7.6 [INFO] [stderr] Compiling base64 v0.10.1 [INFO] [stderr] Compiling futures v0.1.31 [INFO] [stderr] Compiling crossbeam-utils v0.6.6 [INFO] [stderr] Compiling miniz_oxide v0.8.9 [INFO] [stderr] Compiling crossbeam-channel v0.3.9 [INFO] [stderr] Compiling nom v4.2.3 [INFO] [stderr] Compiling crossbeam-epoch v0.7.2 [INFO] [stderr] Compiling metrics-util v0.2.1 [INFO] [stderr] Compiling flate2 v1.1.2 [INFO] [stderr] Compiling hdrhistogram v6.3.4 [INFO] [stderr] Compiling metrics-core v0.4.0 [INFO] [stderr] Compiling metrics-recorder-prometheus v0.2.3 (/opt/rustwide/workdir) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/lib.rs:64:13 [INFO] [stdout] | [INFO] [stdout] 64 | let mut parts = self.histograms.entry(key.into().to_string()).or_insert_with(|| { [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.12s [INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: hdrhistogram v6.3.4, nom v4.2.3 [INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1` [INFO] running `Command { std: "docker" "inspect" "6af7c228856e6197926e571a85157c368b81cf28f36354daad43ceeb31760b27", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6af7c228856e6197926e571a85157c368b81cf28f36354daad43ceeb31760b27", kill_on_drop: false }` [INFO] [stdout] 6af7c228856e6197926e571a85157c368b81cf28f36354daad43ceeb31760b27 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] f4dd6ffa38fbe5dcbd15e9dd90a81393ea660085a9e2bd65406fa16e24691014 [INFO] running `Command { std: "docker" "start" "-a" "f4dd6ffa38fbe5dcbd15e9dd90a81393ea660085a9e2bd65406fa16e24691014", kill_on_drop: false }` [INFO] [stderr] Compiling metrics-recorder-prometheus v0.2.3 (/opt/rustwide/workdir) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/lib.rs:64:13 [INFO] [stdout] | [INFO] [stdout] 64 | let mut parts = self.histograms.entry(key.into().to_string()).or_insert_with(|| { [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/lib.rs:64:13 [INFO] [stdout] | [INFO] [stdout] 64 | let mut parts = self.histograms.entry(key.into().to_string()).or_insert_with(|| { [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.35s [INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: hdrhistogram v6.3.4, nom v4.2.3 [INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1` [INFO] running `Command { std: "docker" "inspect" "f4dd6ffa38fbe5dcbd15e9dd90a81393ea660085a9e2bd65406fa16e24691014", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f4dd6ffa38fbe5dcbd15e9dd90a81393ea660085a9e2bd65406fa16e24691014", kill_on_drop: false }` [INFO] [stdout] f4dd6ffa38fbe5dcbd15e9dd90a81393ea660085a9e2bd65406fa16e24691014 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] bd5871a5641f17ccbac5bba9b42e1f60a20b0cf35d460dde455a6e40b6a4d9c4 [INFO] running `Command { std: "docker" "start" "-a" "bd5871a5641f17ccbac5bba9b42e1f60a20b0cf35d460dde455a6e40b6a4d9c4", kill_on_drop: false }` [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/lib.rs:64:13 [INFO] [stderr] | [INFO] [stderr] 64 | let mut parts = self.histograms.entry(key.into().to_string()).or_insert_with(|| { [INFO] [stderr] | ----^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: `metrics-recorder-prometheus` (lib) generated 1 warning (run `cargo fix --lib -p metrics-recorder-prometheus` to apply 1 suggestion) [INFO] [stderr] warning: `metrics-recorder-prometheus` (lib test) generated 1 warning (1 duplicate) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s [INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: hdrhistogram v6.3.4, nom v4.2.3 [INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1` [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/metrics_recorder_prometheus-9aed5728a1ab8183) [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_recorder_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] running `Command { std: "docker" "inspect" "bd5871a5641f17ccbac5bba9b42e1f60a20b0cf35d460dde455a6e40b6a4d9c4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "bd5871a5641f17ccbac5bba9b42e1f60a20b0cf35d460dde455a6e40b6a4d9c4", kill_on_drop: false }` [INFO] [stdout] bd5871a5641f17ccbac5bba9b42e1f60a20b0cf35d460dde455a6e40b6a4d9c4