[INFO] fetching crate prometheus-utils 0.5.1...
[INFO] checking prometheus-utils-0.5.1 against try#07fecb9cf34c4979a772ba38c99d6d9144768413 for pr-87710
[INFO] extracting crate prometheus-utils 0.5.1 into /workspace/builds/worker-35/source
[INFO] validating manifest of crates.io crate prometheus-utils 0.5.1 on toolchain 07fecb9cf34c4979a772ba38c99d6d9144768413
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-35/source/rust-toolchain
[INFO] started tweaking crates.io crate prometheus-utils 0.5.1
[INFO] finished tweaking crates.io crate prometheus-utils 0.5.1
[INFO] tweaked toml for crates.io crate prometheus-utils 0.5.1 written to /workspace/builds/worker-35/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 413b7a9b799aa5f0ed92017b5d53cd13be71314640e30e750dd85176d58db5e5
[INFO] running `Command { std: "docker" "start" "-a" "413b7a9b799aa5f0ed92017b5d53cd13be71314640e30e750dd85176d58db5e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "413b7a9b799aa5f0ed92017b5d53cd13be71314640e30e750dd85176d58db5e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "413b7a9b799aa5f0ed92017b5d53cd13be71314640e30e750dd85176d58db5e5", kill_on_drop: false }`
[INFO] [stdout] 413b7a9b799aa5f0ed92017b5d53cd13be71314640e30e750dd85176d58db5e5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b9d9c94aefc5e16f56202199bfe62e1b57987455309e2b8868390d04e3db112a
[INFO] running `Command { std: "docker" "start" "-a" "b9d9c94aefc5e16f56202199bfe62e1b57987455309e2b8868390d04e3db112a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.100
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling protobuf v2.25.1
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling prometheus v0.12.0
[INFO] [stderr]    Compiling futures-core v0.3.16
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]    Compiling paste v1.0.5
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]     Checking instant v0.1.10
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]    Compiling pin-project-internal v1.0.8
[INFO] [stderr]    Compiling tokio-macros v0.2.6
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]     Checking thiserror v1.0.26
[INFO] [stderr]     Checking pin-project v1.0.8
[INFO] [stderr]     Checking prometheus-utils v0.5.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]   --> src/instrumented_future.rs:45:55
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pre_polls: Vec<Box<dyn FnOnce() -> Option<Box<dyn Drop + Send>> + Send>>,
[INFO] [stdout]    |                                                       ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dyn_drop)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]   --> src/instrumented_future.rs:57:34
[INFO] [stdout]    |
[INFO] [stdout] 57 |     resource_guards: Vec<Box<dyn Drop + Send>>,
[INFO] [stdout]    |                                  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]   --> src/instrumented_future.rs:45:55
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pre_polls: Vec<Box<dyn FnOnce() -> Option<Box<dyn Drop + Send>> + Send>>,
[INFO] [stdout]    |                                                       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]   --> src/instrumented_future.rs:84:59
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn with_guard<GuardFn: FnOnce() -> Option<Box<dyn Drop + Send>> + Send + 'static>(
[INFO] [stdout]    |                                                           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]   --> src/instrumented_future.rs:45:55
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pre_polls: Vec<Box<dyn FnOnce() -> Option<Box<dyn Drop + Send>> + Send>>,
[INFO] [stdout]    |                                                       ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dyn_drop)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]   --> src/instrumented_future.rs:57:34
[INFO] [stdout]    |
[INFO] [stdout] 57 |     resource_guards: Vec<Box<dyn Drop + Send>>,
[INFO] [stdout]    |                                  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]   --> src/instrumented_future.rs:45:55
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pre_polls: Vec<Box<dyn FnOnce() -> Option<Box<dyn Drop + Send>> + Send>>,
[INFO] [stdout]    |                                                       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]   --> src/instrumented_future.rs:84:59
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn with_guard<GuardFn: FnOnce() -> Option<Box<dyn Drop + Send>> + Send + 'static>(
[INFO] [stdout]    |                                                           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 30.08s
[INFO] running `Command { std: "docker" "inspect" "b9d9c94aefc5e16f56202199bfe62e1b57987455309e2b8868390d04e3db112a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9d9c94aefc5e16f56202199bfe62e1b57987455309e2b8868390d04e3db112a", kill_on_drop: false }`
[INFO] [stdout] b9d9c94aefc5e16f56202199bfe62e1b57987455309e2b8868390d04e3db112a