[INFO] fetching crate prometrics 0.1.13...
[INFO] checking prometrics-0.1.13 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate prometrics 0.1.13 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate prometrics 0.1.13 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate prometrics 0.1.13
[INFO] finished tweaking crates.io crate prometrics 0.1.13
[INFO] tweaked toml for crates.io crate prometrics 0.1.13 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate crates.io crate prometrics 0.1.13 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6e56648dc80f9d80639fcd9f919b05708c6a83ef7d1b104fe623cf303aba647d
[INFO] running `Command { std: "docker" "start" "-a" "6e56648dc80f9d80639fcd9f919b05708c6a83ef7d1b104fe623cf303aba647d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e56648dc80f9d80639fcd9f919b05708c6a83ef7d1b104fe623cf303aba647d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e56648dc80f9d80639fcd9f919b05708c6a83ef7d1b104fe623cf303aba647d", kill_on_drop: false }`
[INFO] [stdout] 6e56648dc80f9d80639fcd9f919b05708c6a83ef7d1b104fe623cf303aba647d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=forbid -Dtail_expr_drop_order" "-e" "RUSTDOCFLAGS=--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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 12bfc0fc3399411fd79040c051cb6b3881e95b549991af213b2db275727bd8f4
[INFO] running `Command { std: "docker" "start" "-a" "12bfc0fc3399411fd79040c051cb6b3881e95b549991af213b2db275727bd8f4", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking nom v2.2.1
[INFO] [stderr]     Checking atomic_immut v0.1.4
[INFO] [stderr]    Compiling procinfo v0.4.2
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling trackable_derive v0.1.3
[INFO] [stderr]     Checking trackable v0.2.23
[INFO] [stderr]     Checking prometrics v0.1.13 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/metrics/process.rs:17:31
[INFO] [stdout]    |
[INFO] [stdout] 17 |     static ref CLK_TCK: f64 = { unsafe { libc::sysconf(libc::_SC_CLK_TCK) as f64 } };
[INFO] [stdout]    |                               ^^                                                  ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 17 -     static ref CLK_TCK: f64 = { unsafe { libc::sysconf(libc::_SC_CLK_TCK) as f64 } };
[INFO] [stdout] 17 +     static ref CLK_TCK: f64 = unsafe { libc::sysconf(libc::_SC_CLK_TCK) as f64 };
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/metrics/process.rs:18:34
[INFO] [stdout]    |
[INFO] [stdout] 18 |     static ref PAGESIZE: usize = { unsafe { libc::sysconf(libc::_SC_PAGESIZE) as usize } };
[INFO] [stdout]    |                                  ^^                                                     ^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 18 -     static ref PAGESIZE: usize = { unsafe { libc::sysconf(libc::_SC_PAGESIZE) as usize } };
[INFO] [stdout] 18 +     static ref PAGESIZE: usize = unsafe { libc::sysconf(libc::_SC_PAGESIZE) as usize };
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/metrics/process.rs:17:31
[INFO] [stdout]    |
[INFO] [stdout] 17 |     static ref CLK_TCK: f64 = { unsafe { libc::sysconf(libc::_SC_CLK_TCK) as f64 } };
[INFO] [stdout]    |                               ^^                                                  ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 17 -     static ref CLK_TCK: f64 = { unsafe { libc::sysconf(libc::_SC_CLK_TCK) as f64 } };
[INFO] [stdout] 17 +     static ref CLK_TCK: f64 = unsafe { libc::sysconf(libc::_SC_CLK_TCK) as f64 };
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/metrics/process.rs:18:34
[INFO] [stdout]    |
[INFO] [stdout] 18 |     static ref PAGESIZE: usize = { unsafe { libc::sysconf(libc::_SC_PAGESIZE) as usize } };
[INFO] [stdout]    |                                  ^^                                                     ^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 18 -     static ref PAGESIZE: usize = { unsafe { libc::sysconf(libc::_SC_PAGESIZE) as usize } };
[INFO] [stdout] 18 +     static ref PAGESIZE: usize = unsafe { libc::sysconf(libc::_SC_PAGESIZE) as usize };
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `labels` is never read
[INFO] [stdout]    --> src/label.rs:210:5
[INFO] [stdout]     |
[INFO] [stdout] 209 | pub struct Iter<'a> {
[INFO] [stdout]     |            ---- field in this struct
[INFO] [stdout] 210 |     labels: std::sync::Arc<Vec<Label>>,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Iter` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `count` is never read
[INFO] [stdout]    --> src/metrics/histogram.rs:321:5
[INFO] [stdout]     |
[INFO] [stdout] 315 | struct Inner {
[INFO] [stdout]     |        ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 321 |     count: AtomicU64,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Inner` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `labels` is never read
[INFO] [stdout]    --> src/label.rs:210:5
[INFO] [stdout]     |
[INFO] [stdout] 209 | pub struct Iter<'a> {
[INFO] [stdout]     |            ---- field in this struct
[INFO] [stdout] 210 |     labels: std::sync::Arc<Vec<Label>>,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Iter` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `count` is never read
[INFO] [stdout]    --> src/metrics/histogram.rs:321:5
[INFO] [stdout]     |
[INFO] [stdout] 315 | struct Inner {
[INFO] [stdout]     |        ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 321 |     count: AtomicU64,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Inner` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.62s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: nom v2.2.1
[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" "12bfc0fc3399411fd79040c051cb6b3881e95b549991af213b2db275727bd8f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12bfc0fc3399411fd79040c051cb6b3881e95b549991af213b2db275727bd8f4", kill_on_drop: false }`
[INFO] [stdout] 12bfc0fc3399411fd79040c051cb6b3881e95b549991af213b2db275727bd8f4