[INFO] fetching crate roundabout 0.2.0...
[INFO] checking roundabout-0.2.0 against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] extracting crate roundabout 0.2.0 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate roundabout 0.2.0 on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate roundabout 0.2.0
[INFO] finished tweaking crates.io crate roundabout 0.2.0
[INFO] tweaked toml for crates.io crate roundabout 0.2.0 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate crates.io crate roundabout 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3fcaeaddda9fefb80ead9973122c276898ce747d96f523117a8d48bfc2ff74b1
[INFO] running `Command { std: "docker" "start" "-a" "3fcaeaddda9fefb80ead9973122c276898ce747d96f523117a8d48bfc2ff74b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3fcaeaddda9fefb80ead9973122c276898ce747d96f523117a8d48bfc2ff74b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3fcaeaddda9fefb80ead9973122c276898ce747d96f523117a8d48bfc2ff74b1", kill_on_drop: false }`
[INFO] [stdout] 3fcaeaddda9fefb80ead9973122c276898ce747d96f523117a8d48bfc2ff74b1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 021fa1e68c985f835b9895c13311b6f6cba84549cee9b19da2214a4c0991676b
[INFO] running `Command { std: "docker" "start" "-a" "021fa1e68c985f835b9895c13311b6f6cba84549cee9b19da2214a4c0991676b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling anyhow v1.0.42
[INFO] [stderr]     Checking plotters-backend v0.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking half v1.7.1
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling ahash v0.7.4
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking itertools v0.10.1
[INFO] [stderr]     Checking crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]     Checking plotters-svg v0.3.0
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking bstr v0.2.16
[INFO] [stderr]    Compiling cast v0.2.6
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking plotters v0.3.1
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking nix v0.20.0
[INFO] [stderr]     Checking core_affinity v0.5.10
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking roundabout v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `new_fn`
[INFO] [stdout]   --> src/util/triple.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn new_fn<F: Fn() -> T>(factory: F) -> (TripleBufferedHead<T>, TripleBufferedTail<T>) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_default`
[INFO] [stdout]   --> src/util/triple.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn new_default() -> (TripleBufferedHead<T>, TripleBufferedTail<T>) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_clone`
[INFO] [stdout]   --> src/util/triple.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn new_clone(initial: T) -> (TripleBufferedHead<T>, TripleBufferedTail<T>) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `HashSet`
[INFO] [stdout]  --> src/util.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub type HashSet<T> = std::collections::HashSet<T, ahash::RandomState>;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `IndexMap`
[INFO] [stdout]  --> src/util.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub type IndexMap<K, T> = indexmap::map::IndexMap<K, T, ahash::RandomState>;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ctrlc v3.1.9
[INFO] [stderr]     Checking criterion v0.3.4
[INFO] [stdout] warning: associated function is never used: `new_fn`
[INFO] [stdout]   --> src/util/triple.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn new_fn<F: Fn() -> T>(factory: F) -> (TripleBufferedHead<T>, TripleBufferedTail<T>) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_default`
[INFO] [stdout]   --> src/util/triple.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn new_default() -> (TripleBufferedHead<T>, TripleBufferedTail<T>) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_clone`
[INFO] [stdout]   --> src/util/triple.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn new_clone(initial: T) -> (TripleBufferedHead<T>, TripleBufferedTail<T>) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `HashSet`
[INFO] [stdout]  --> src/util.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub type HashSet<T> = std::collections::HashSet<T, ahash::RandomState>;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `IndexMap`
[INFO] [stdout]  --> src/util.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub type IndexMap<K, T> = indexmap::map::IndexMap<K, T, ahash::RandomState>;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.10s
[INFO] running `Command { std: "docker" "inspect" "021fa1e68c985f835b9895c13311b6f6cba84549cee9b19da2214a4c0991676b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "021fa1e68c985f835b9895c13311b6f6cba84549cee9b19da2214a4c0991676b", kill_on_drop: false }`
[INFO] [stdout] 021fa1e68c985f835b9895c13311b6f6cba84549cee9b19da2214a4c0991676b