[INFO] fetching crate shardio 0.8.0...
[INFO] checking shardio-0.8.0 against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] extracting crate shardio 0.8.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate shardio 0.8.0 on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate shardio 0.8.0
[INFO] finished tweaking crates.io crate shardio 0.8.0
[INFO] tweaked toml for crates.io crate shardio 0.8.0 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lz4 v1.23.2
[INFO] [stderr]   Downloaded is_sorted v0.1.1
[INFO] [stderr]   Downloaded lz4-sys v1.9.2
[INFO] [stderr]   Downloaded min-max-heap v1.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e020c3c116f8e4647c68d0f6b7cb2522892e3c9c11345282e6ce40920b260939
[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" "e020c3c116f8e4647c68d0f6b7cb2522892e3c9c11345282e6ce40920b260939", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e020c3c116f8e4647c68d0f6b7cb2522892e3c9c11345282e6ce40920b260939", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e020c3c116f8e4647c68d0f6b7cb2522892e3c9c11345282e6ce40920b260939", kill_on_drop: false }`
[INFO] [stdout] e020c3c116f8e4647c68d0f6b7cb2522892e3c9c11345282e6ce40920b260939
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 100145e8ea0a9673471d761b5c4345440a04c0d88c5e7c3e9c363b2c439dc3bf
[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" "100145e8ea0a9673471d761b5c4345440a04c0d88c5e7c3e9c363b2c439dc3bf", kill_on_drop: false }`
[INFO] [stderr]     Checking min-max-heap v1.3.0
[INFO] [stderr]     Checking is_sorted v0.1.1
[INFO] [stderr]    Compiling crossbeam-utils v0.8.4
[INFO] [stderr]    Compiling memoffset v0.6.3
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling lz4-sys v1.9.2
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking getrandom v0.2.2
[INFO] [stderr]    Compiling cast v0.2.5
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]     Checking bstr v0.2.16
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking backtrace v0.3.58
[INFO] [stderr]     Checking crossbeam-epoch v0.9.4
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking plotters v0.3.0
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]     Checking rayon-core v1.9.0
[INFO] [stderr]     Checking quickcheck v0.9.2
[INFO] [stderr]     Checking criterion v0.3.4
[INFO] [stderr]     Checking lz4 v1.23.2
[INFO] [stderr]     Checking shardio v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `benchmark_roundtrip`
[INFO] [stdout]    --> benches/my_bench.rs:130:8
[INFO] [stdout]     |
[INFO] [stdout] 130 |     fn benchmark_roundtrip(c: &mut Criterion) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `getf`
[INFO] [stdout]    --> benches/my_bench.rs:134:8
[INFO] [stdout]     |
[INFO] [stdout] 134 |     fn getf() -> impl Write {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `direct`
[INFO] [stdout]    --> benches/my_bench.rs:138:8
[INFO] [stdout]     |
[INFO] [stdout] 138 |     fn direct(size: usize) -> Result<(), Error> {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `lz4_only`
[INFO] [stdout]    --> benches/my_bench.rs:144:8
[INFO] [stdout]     |
[INFO] [stdout] 144 |     fn lz4_only(size: usize) -> Result<(), Error> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `bincode_only`
[INFO] [stdout]    --> benches/my_bench.rs:152:8
[INFO] [stdout]     |
[INFO] [stdout] 152 |     fn bincode_only(size: usize) -> Result<(), Error> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `bincode_lz4`
[INFO] [stdout]    --> benches/my_bench.rs:159:8
[INFO] [stdout]     |
[INFO] [stdout] 159 |     fn bincode_lz4(size: usize) -> Result<(), Error> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `bincode_buf_lz4`
[INFO] [stdout]    --> benches/my_bench.rs:167:8
[INFO] [stdout]     |
[INFO] [stdout] 167 |     fn bincode_buf_lz4(size: usize) -> Result<(), Error> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `KB`
[INFO] [stdout]    --> benches/my_bench.rs:178:5
[INFO] [stdout]     |
[INFO] [stdout] 178 |     const KB: usize = 1024;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static is never used: `v`
[INFO] [stdout]    --> benches/my_bench.rs:179:5
[INFO] [stdout]     |
[INFO] [stdout] 179 |     static v: [usize; 4] = [256 * KB, 512 * KB, 1024 * KB, 2048 * KB];
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> benches/my_bench.rs:96:21
[INFO] [stdout]    |
[INFO] [stdout] 96 |                     sender.send(tt);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `v` should have an upper case name
[INFO] [stdout]    --> benches/my_bench.rs:179:12
[INFO] [stdout]     |
[INFO] [stdout] 179 |     static v: [usize; 4] = [256 * KB, 512 * KB, 1024 * KB, 2048 * KB];
[INFO] [stdout]     |            ^ help: convert the identifier to upper case (notice the capitalization): `V`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.49s
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "100145e8ea0a9673471d761b5c4345440a04c0d88c5e7c3e9c363b2c439dc3bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "100145e8ea0a9673471d761b5c4345440a04c0d88c5e7c3e9c363b2c439dc3bf", kill_on_drop: false }`
[INFO] [stdout] 100145e8ea0a9673471d761b5c4345440a04c0d88c5e7c3e9c363b2c439dc3bf