[INFO] cloning repository https://github.com/rajasekarv/native_spark
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rajasekarv/native_spark" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frajasekarv%2Fnative_spark", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frajasekarv%2Fnative_spark'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8533d4b10868dd1a715d1a580f210aaf6b4d6fcd
[INFO] checking rajasekarv/native_spark against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frajasekarv%2Fnative_spark" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rajasekarv/native_spark on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rajasekarv/native_spark
[INFO] finished tweaking git repo https://github.com/rajasekarv/native_spark
[INFO] tweaked toml for git repo https://github.com/rajasekarv/native_spark written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded erased-serde v0.3.12
[INFO] [stderr]   Downloaded procinfo v0.4.2
[INFO] [stderr]   Downloaded integer-encoding v1.2.1
[INFO] [stderr]   Downloaded rusoto_core v0.43.0
[INFO] [stderr]   Downloaded dyn-clone v1.0.2
[INFO] [stderr]   Downloaded rusoto_signature v0.43.0
[INFO] [stderr]   Downloaded serde_traitobject v0.2.7
[INFO] [stderr]   Downloaded capnp-futures v0.12.0
[INFO] [stderr]   Downloaded ordered-float v0.5.2
[INFO] [stderr]   Downloaded lz4 v1.23.2
[INFO] [stderr]   Downloaded fasthash v0.4.0
[INFO] [stderr]   Downloaded alloc-no-stdlib v1.3.0
[INFO] [stderr]   Downloaded zstd-sys v1.4.13+zstd.1.4.3
[INFO] [stderr]   Downloaded parquet-format v2.5.0
[INFO] [stderr]   Downloaded palaver v0.2.8
[INFO] [stderr]   Downloaded envy v0.4.1
[INFO] [stderr]   Downloaded zstd v0.4.28+zstd.1.4.3
[INFO] [stderr]   Downloaded try_from v0.2.2
[INFO] [stderr]   Downloaded lz4-sys v1.9.2
[INFO] [stderr]   Downloaded rusoto_credential v0.43.0
[INFO] [stderr]   Downloaded relative v0.2.2
[INFO] [stderr]   Downloaded heapless v0.5.5
[INFO] [stderr]   Downloaded snap v0.2.5
[INFO] [stderr]   Downloaded brotli-decompressor v1.3.1
[INFO] [stderr]   Downloaded flatbuffers v0.5.0
[INFO] [stderr]   Downloaded parquet v0.15.1
[INFO] [stderr]   Downloaded seahash v3.0.7
[INFO] [stderr]   Downloaded zstd-safe v1.4.13+zstd.1.4.3
[INFO] [stderr]   Downloaded metatype v0.2.0
[INFO] [stderr]   Downloaded serde_closure_derive v0.2.14
[INFO] [stderr]   Downloaded build_id v0.2.1
[INFO] [stderr]   Downloaded capnp v0.12.3
[INFO] [stderr]   Downloaded rusoto_s3 v0.43.0
[INFO] [stderr]   Downloaded capnpc v0.12.4
[INFO] [stderr]   Downloaded brotli v2.5.1
[INFO] [stderr]   Downloaded thrift v0.0.4
[INFO] [stderr]   Downloaded serde_closure v0.2.14
[INFO] [stderr]   Downloaded arrow v0.15.1
[INFO] [stderr]   Downloaded uriparse v0.6.1
[INFO] [stderr]   Downloaded hash32 v0.1.1
[INFO] [stderr]   Downloaded packed_simd v0.3.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d697ca7d4ee31166c3d4cc510228a9cfb8ce378835cce460864548662a474979
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d697ca7d4ee31166c3d4cc510228a9cfb8ce378835cce460864548662a474979", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d697ca7d4ee31166c3d4cc510228a9cfb8ce378835cce460864548662a474979", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d697ca7d4ee31166c3d4cc510228a9cfb8ce378835cce460864548662a474979", kill_on_drop: false }`
[INFO] [stdout] d697ca7d4ee31166c3d4cc510228a9cfb8ce378835cce460864548662a474979
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 356a0cf46e66a378eb4434962216312739fc6a9cf0c4ccc2272fa9e6501dd01e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "356a0cf46e66a378eb4434962216312739fc6a9cf0c4ccc2272fa9e6501dd01e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking once_cell v1.4.1
[INFO] [stderr]     Checking futures-io v0.3.5
[INFO] [stderr]    Compiling proc-macro-hack v0.5.18
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking smallvec v1.4.2
[INFO] [stderr]    Compiling nix v0.15.0
[INFO] [stderr]    Compiling heapless v0.5.5
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking arc-swap v0.4.7
[INFO] [stderr]    Compiling build_id v0.2.1
[INFO] [stderr]     Checking fastrand v1.3.4
[INFO] [stderr]     Checking nom v2.2.1
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling packed_simd v0.3.3
[INFO] [stderr]    Compiling capnp v0.12.3
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]     Checking event-listener v2.4.0
[INFO] [stderr]     Checking twox-hash v1.5.0
[INFO] [stderr]    Compiling relative v0.2.2
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]     Checking async-task v3.0.0
[INFO] [stderr]     Checking integer-encoding v1.2.1
[INFO] [stderr]     Checking alloc-no-stdlib v1.3.0
[INFO] [stderr]     Checking try-lock v0.2.3
[INFO] [stderr]     Checking vec-arena v0.5.2
[INFO] [stderr]     Checking try_from v0.2.2
[INFO] [stderr]    Compiling parquet v0.15.1
[INFO] [stderr]     Checking parking v1.0.6
[INFO] [stderr]     Checking metatype v0.2.0
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]     Checking seahash v3.0.7
[INFO] [stderr]     Checking downcast-rs v1.2.0
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking dyn-clone v1.0.2
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking tracing-core v0.1.15
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking futures-channel v0.3.5
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking http v0.2.1
[INFO] [stderr]     Checking uriparse v0.6.1
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling hashbrown v0.8.2
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling indexmap v1.5.1
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling memoffset v0.5.5
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking async-mutex v1.2.0
[INFO] [stderr]     Checking miniz_oxide v0.4.1
[INFO] [stderr]     Checking brotli-decompressor v1.3.1
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking multitask v0.2.0
[INFO] [stderr]     Checking async-channel v1.4.1
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling capnpc v0.12.4
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]     Checking generic-array v0.13.2
[INFO] [stderr]    Compiling fasthash-sys v0.3.2
[INFO] [stderr]     Checking futures-lite v0.1.11
[INFO] [stderr]     Checking aho-corasick v0.7.13
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking tracing v0.1.19
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking hash32 v0.1.1
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking snap v0.2.5
[INFO] [stderr]    Compiling procinfo v0.4.2
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking as-slice v0.1.3
[INFO] [stderr]     Checking brotli v2.5.1
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]     Checking flatbuffers v0.5.0
[INFO] [stderr]     Checking blocking v0.5.2
[INFO] [stderr]     Checking crossbeam-channel v0.4.3
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.34
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking parking_lot_core v0.7.2
[INFO] [stderr]     Checking signal-hook-registry v1.2.1
[INFO] [stderr]     Checking socket2 v0.3.12
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking polling v0.1.6
[INFO] [stderr]     Checking flate2 v1.0.17
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking async-io v0.1.11
[INFO] [stderr]    Compiling cc v1.0.59
[INFO] [stderr]    Compiling const-random-macro v0.1.8
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking thrift v0.0.4
[INFO] [stderr]     Checking crossbeam v0.7.3
[INFO] [stderr]     Checking ordered-float v0.5.2
[INFO] [stderr]     Checking term v0.6.1
[INFO] [stderr]     Checking xoroshiro128 v0.3.0
[INFO] [stderr]     Checking chrono v0.4.15
[INFO] [stderr]     Checking async-executor v0.1.2
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking const-random v0.1.8
[INFO] [stderr]     Checking parquet-format v2.5.0
[INFO] [stderr]     Checking ahash v0.3.8
[INFO] [stderr]     Checking fasthash v0.4.0
[INFO] [stderr]     Checking dashmap v3.11.10
[INFO] [stderr]    Compiling zstd-sys v1.4.13+zstd.1.4.3
[INFO] [stderr]    Compiling lz4-sys v1.9.2
[INFO] [stderr]     Checking simplelog v0.7.6
[INFO] [stderr]    Compiling vega v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking statrs v0.12.0
[INFO] [stderr]     Checking rand_distr v0.2.2
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking palaver v0.2.8
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling serde_closure_derive v0.2.14
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]    Compiling async-trait v0.1.40
[INFO] [stderr]    Compiling async-attributes v1.1.1
[INFO] [stderr]     Checking lz4 v1.23.2
[INFO] [stderr]     Checking async-std v1.6.3
[INFO] [stderr]     Checking thiserror v1.0.20
[INFO] [stderr]     Checking pin-project v0.4.23
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking capnp-futures v0.12.0
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking erased-serde v0.3.12
[INFO] [stderr]     Checking envy v0.4.1
[INFO] [stderr]     Checking serde_closure v0.2.14
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking parking_lot v0.10.2
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking serde_traitobject v0.2.7
[INFO] [stderr]     Checking arrow v0.15.1
[INFO] [stderr]     Checking zstd-safe v1.4.13+zstd.1.4.3
[INFO] [stderr]     Checking zstd v0.4.28+zstd.1.4.3
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking h2 v0.2.6
[INFO] [stderr]     Checking hyper v0.13.7
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     specialization,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]   = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     specialization,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]   = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/rdd/pair_rdd.rs:76:56
[INFO] [stdout]    |
[INFO] [stdout] 76 |         let merge_value = Box::new(Fn!(move |(buf, v)| { (f_clone)((buf, v)) }));
[INFO] [stdout]    |                                                        ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/rdd/pair_rdd.rs:77:60
[INFO] [stdout]    |
[INFO] [stdout] 77 |         let merge_combiners = Box::new(Fn!(move |(b1, b2)| { (func)((b1, b2)) }));
[INFO] [stdout]    |                                                            ^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/rdd/rdd.rs:223:46
[INFO] [stdout]     |
[INFO] [stdout] 223 |               -> Box<dyn Iterator<Item = _>> { (func)(items) });
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/rdd/rdd.rs:442:62
[INFO] [stdout]     |
[INFO] [stdout] 442 |             Fn!(|iter: Box<dyn Iterator<Item = Self::Item>>| { iter.count() as u64 });
[INFO] [stdout]     |                                                              ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]     --> src/rdd/rdd.rs:1049:19
[INFO] [stdout]      |
[INFO] [stdout] 1049 |          -> usize { iter.count() });
[INFO] [stdout]      |                   ^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/utils/test_utils.rs:12:43
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let rdd_f = Fn!(move |data: u8| -> u8 { data });
[INFO] [stdout]    |                                           ^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/rdd/pair_rdd.rs:76:56
[INFO] [stdout]    |
[INFO] [stdout] 76 |         let merge_value = Box::new(Fn!(move |(buf, v)| { (f_clone)((buf, v)) }));
[INFO] [stdout]    |                                                        ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/rdd/pair_rdd.rs:77:60
[INFO] [stdout]    |
[INFO] [stdout] 77 |         let merge_combiners = Box::new(Fn!(move |(b1, b2)| { (func)((b1, b2)) }));
[INFO] [stdout]    |                                                            ^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/rdd/rdd.rs:223:46
[INFO] [stdout]     |
[INFO] [stdout] 223 |               -> Box<dyn Iterator<Item = _>> { (func)(items) });
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/rdd/rdd.rs:442:62
[INFO] [stdout]     |
[INFO] [stdout] 442 |             Fn!(|iter: Box<dyn Iterator<Item = Self::Item>>| { iter.count() as u64 });
[INFO] [stdout]     |                                                              ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]     --> src/rdd/rdd.rs:1049:19
[INFO] [stdout]      |
[INFO] [stdout] 1049 |          -> usize { iter.count() });
[INFO] [stdout]      |                   ^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashSet`
[INFO] [stdout]  --> tests/test_rdd.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> tests/test_rdd.rs:68:31
[INFO] [stdout]    |
[INFO] [stdout] 68 |             |x: i32| Box::new((1..(1 + x))) as Box<dyn Iterator<Item = _>>
[INFO] [stdout]    |                               ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4m 30s
[INFO] running `Command { std: "docker" "inspect" "356a0cf46e66a378eb4434962216312739fc6a9cf0c4ccc2272fa9e6501dd01e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "356a0cf46e66a378eb4434962216312739fc6a9cf0c4ccc2272fa9e6501dd01e", kill_on_drop: false }`
[INFO] [stdout] 356a0cf46e66a378eb4434962216312739fc6a9cf0c4ccc2272fa9e6501dd01e