[INFO] fetching crate prometheus-utils 0.5.1...
[INFO] checking prometheus-utils-0.5.1 against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] extracting crate prometheus-utils 0.5.1 into /workspace/builds/worker-20/source
[INFO] validating manifest of crates.io crate prometheus-utils 0.5.1 on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-20/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-20/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "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" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "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-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 00dad4d5790f8d8a25530b72f1fb9c981a1f2e36fcb485e3c667a65bba5f4ab5
[INFO] running `Command { std: "docker" "start" "-a" "00dad4d5790f8d8a25530b72f1fb9c981a1f2e36fcb485e3c667a65bba5f4ab5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "00dad4d5790f8d8a25530b72f1fb9c981a1f2e36fcb485e3c667a65bba5f4ab5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00dad4d5790f8d8a25530b72f1fb9c981a1f2e36fcb485e3c667a65bba5f4ab5", kill_on_drop: false }`
[INFO] [stdout] 00dad4d5790f8d8a25530b72f1fb9c981a1f2e36fcb485e3c667a65bba5f4ab5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 32ca2b5a1bcaf7d6d3f9c238eb1630ae05389323ef9097bb0038c17df1e30301
[INFO] running `Command { std: "docker" "start" "-a" "32ca2b5a1bcaf7d6d3f9c238eb1630ae05389323ef9097bb0038c17df1e30301", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]    Compiling protobuf v2.25.1
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling prometheus v0.12.0
[INFO] [stderr]     Checking fnv v1.0.7
[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 lock_api v0.4.5
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]    Compiling thiserror-impl v1.0.29
[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 v1.0.29
[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: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: 3 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: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: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.62s
[INFO] running `Command { std: "docker" "inspect" "32ca2b5a1bcaf7d6d3f9c238eb1630ae05389323ef9097bb0038c17df1e30301", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32ca2b5a1bcaf7d6d3f9c238eb1630ae05389323ef9097bb0038c17df1e30301", kill_on_drop: false }`
[INFO] [stdout] 32ca2b5a1bcaf7d6d3f9c238eb1630ae05389323ef9097bb0038c17df1e30301