[INFO] fetching crate ixlist 0.1.0...
[INFO] checking ixlist-0.1.0 against try#894d32a5432c6a6461bb2aac7c3d5f2e87dce83f for pr-77015
[INFO] extracting crate ixlist 0.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate ixlist 0.1.0 on toolchain 894d32a5432c6a6461bb2aac7c3d5f2e87dce83f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ixlist 0.1.0
[INFO] finished tweaking crates.io crate ixlist 0.1.0
[INFO] tweaked toml for crates.io crate ixlist 0.1.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 03af9be0b65660262af4d122d3ca5b778c1963f2f03dfeccc6bef3dadcf80f24
[INFO] running `Command { std: "docker" "start" "-a" "03af9be0b65660262af4d122d3ca5b778c1963f2f03dfeccc6bef3dadcf80f24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "03af9be0b65660262af4d122d3ca5b778c1963f2f03dfeccc6bef3dadcf80f24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03af9be0b65660262af4d122d3ca5b778c1963f2f03dfeccc6bef3dadcf80f24", kill_on_drop: false }`
[INFO] [stdout] 03af9be0b65660262af4d122d3ca5b778c1963f2f03dfeccc6bef3dadcf80f24
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8db8a2b45316858f47883ee7922c66885d0341986825650903b5be2326175b28
[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" "8db8a2b45316858f47883ee7922c66885d0341986825650903b5be2326175b28", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.78
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking bencher v0.1.5
[INFO] [stderr]     Checking ixlist v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking itertools v0.6.5
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> benches/bench1.rs:26:18
[INFO] [stdout]    |
[INFO] [stdout] 26 |         for _ in (0..n) {
[INFO] [stdout]    |                  ^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> benches/bench1.rs:38:18
[INFO] [stdout]    |
[INFO] [stdout] 38 |         for _ in (0..n) {
[INFO] [stdout]    |                  ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> benches/bench1.rs:66:18
[INFO] [stdout]    |
[INFO] [stdout] 66 |         for _ in (0..n) {
[INFO] [stdout]    |                  ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> benches/bench1.rs:78:18
[INFO] [stdout]    |
[INFO] [stdout] 78 |         for _ in (0..n) {
[INFO] [stdout]    |                  ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> benches/bench1.rs:90:14
[INFO] [stdout]    |
[INFO] [stdout] 90 |     for _ in (0..n) {
[INFO] [stdout]    |              ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> benches/bench1.rs:110:14
[INFO] [stdout]     |
[INFO] [stdout] 110 |     for _ in (0..n) {
[INFO] [stdout]     |              ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> benches/bench1.rs:131:14
[INFO] [stdout]     |
[INFO] [stdout] 131 |     for _ in (0..n) {
[INFO] [stdout]     |              ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.61s
[INFO] running `Command { std: "docker" "inspect" "8db8a2b45316858f47883ee7922c66885d0341986825650903b5be2326175b28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8db8a2b45316858f47883ee7922c66885d0341986825650903b5be2326175b28", kill_on_drop: false }`
[INFO] [stdout] 8db8a2b45316858f47883ee7922c66885d0341986825650903b5be2326175b28