[INFO] fetching crate ixlist 0.1.0...
[INFO] checking ixlist-0.1.0 against try#7306d3110618f84a6a4662b9e2cc4fd0d9b02da8 for pr-97346
[INFO] extracting crate ixlist 0.1.0 into /workspace/builds/worker-19/source
[INFO] validating manifest of crates.io crate ixlist 0.1.0 on toolchain 7306d3110618f84a6a4662b9e2cc4fd0d9b02da8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7306d3110618f84a6a4662b9e2cc4fd0d9b02da8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-19/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7306d3110618f84a6a4662b9e2cc4fd0d9b02da8" "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" "+7306d3110618f84a6a4662b9e2cc4fd0d9b02da8" "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-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+7306d3110618f84a6a4662b9e2cc4fd0d9b02da8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9aebc41bee5eb57147009ad183451ea7cdb51a6fd511723f9e5532909d22bd19
[INFO] running `Command { std: "docker" "start" "-a" "9aebc41bee5eb57147009ad183451ea7cdb51a6fd511723f9e5532909d22bd19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9aebc41bee5eb57147009ad183451ea7cdb51a6fd511723f9e5532909d22bd19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9aebc41bee5eb57147009ad183451ea7cdb51a6fd511723f9e5532909d22bd19", kill_on_drop: false }`
[INFO] [stdout] 9aebc41bee5eb57147009ad183451ea7cdb51a6fd511723f9e5532909d22bd19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+7306d3110618f84a6a4662b9e2cc4fd0d9b02da8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 974c452b75f9ad64cf08bc1576c63c5d40d5819a2e3e1de41d6c020f792d159c
[INFO] running `Command { std: "docker" "start" "-a" "974c452b75f9ad64cf08bc1576c63c5d40d5819a2e3e1de41d6c020f792d159c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[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]    |                  ^    ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 26 -         for _ in (0..n) {
[INFO] [stdout] 26 +         for _ in 0..n {
[INFO] [stdout]    | 
[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]    |                  ^    ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 38 -         for _ in (0..n) {
[INFO] [stdout] 38 +         for _ in 0..n {
[INFO] [stdout]    | 
[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]    |                  ^    ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 66 -         for _ in (0..n) {
[INFO] [stdout] 66 +         for _ in 0..n {
[INFO] [stdout]    | 
[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]    |                  ^    ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 78 -         for _ in (0..n) {
[INFO] [stdout] 78 +         for _ in 0..n {
[INFO] [stdout]    | 
[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]    |              ^    ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 90 -     for _ in (0..n) {
[INFO] [stdout] 90 +     for _ in 0..n {
[INFO] [stdout]    | 
[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]     |              ^    ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 110 -     for _ in (0..n) {
[INFO] [stdout] 110 +     for _ in 0..n {
[INFO] [stdout]     | 
[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]     |              ^    ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 131 -     for _ in (0..n) {
[INFO] [stdout] 131 +     for _ in 0..n {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.88s
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "974c452b75f9ad64cf08bc1576c63c5d40d5819a2e3e1de41d6c020f792d159c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "974c452b75f9ad64cf08bc1576c63c5d40d5819a2e3e1de41d6c020f792d159c", kill_on_drop: false }`
[INFO] [stdout] 974c452b75f9ad64cf08bc1576c63c5d40d5819a2e3e1de41d6c020f792d159c