[INFO] cloning repository https://github.com/chengli1986/571b
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chengli1986/571b" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchengli1986%2F571b", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchengli1986%2F571b'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5a313ccc0f20adc2291b9cc5f5361cc9b58ff892
[INFO] checking chengli1986/571b against try#9cfe725f0995b018340c519db1b2f3cf8a7e0631 for pr-81174
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchengli1986%2F571b" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chengli1986/571b on toolchain 9cfe725f0995b018340c519db1b2f3cf8a7e0631
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/chengli1986/571b
[INFO] finished tweaking git repo https://github.com/chengli1986/571b
[INFO] tweaked toml for git repo https://github.com/chengli1986/571b written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/chengli1986/571b already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: the lock file /workspace/builds/worker-0/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.70
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.70
[INFO] [stderr]   Downloaded bumpalo v3.5.0
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.70
[INFO] [stderr]   Downloaded sha1 v0.6.0
[INFO] [stderr]   Downloaded serde_derive v1.0.123
[INFO] [stderr]   Downloaded log v0.4.14
[INFO] [stderr]   Downloaded ryu v1.0.5
[INFO] [stderr]   Downloaded itoa v0.4.7
[INFO] [stderr]   Downloaded libc v0.1.12
[INFO] [stderr]   Downloaded strsim v0.9.3
[INFO] [stderr]   Downloaded remove_dir_all v0.5.3
[INFO] [stderr]   Downloaded byteorder v1.4.2
[INFO] [stderr]   Downloaded once_cell v1.5.2
[INFO] [stderr]   Downloaded docopt v1.1.0
[INFO] [stderr]   Downloaded aho-corasick v0.7.15
[INFO] [stderr]   Downloaded rand v0.4.6
[INFO] [stderr]   Downloaded thread_local v1.1.2
[INFO] [stderr]   Downloaded time v0.2.25
[INFO] [stderr]   Downloaded libc v0.2.83
[INFO] [stderr]   Downloaded regex-syntax v0.6.22
[INFO] [stderr]   Downloaded discard v1.0.4
[INFO] [stderr]   Downloaded regex v1.4.3
[INFO] [stderr]   Downloaded mmap v0.1.1
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.70
[INFO] [stderr]   Downloaded stdweb-derive v0.5.3
[INFO] [stderr]   Downloaded time-macros v0.1.1
[INFO] [stderr]   Downloaded syn v1.0.60
[INFO] [stderr]   Downloaded rand_core v0.4.2
[INFO] [stderr]   Downloaded tempdir v0.3.7
[INFO] [stderr]   Downloaded const_fn v0.4.5
[INFO] [stderr]   Downloaded base-x v0.2.8
[INFO] [stderr]   Downloaded standback v0.2.14
[INFO] [stderr]   Downloaded stdweb-internal-runtime v0.1.5
[INFO] [stderr]   Downloaded stdweb-internal-macros v0.2.9
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.70
[INFO] [stderr]   Downloaded quote v1.0.8
[INFO] [stderr]   Downloaded stdweb v0.4.20
[INFO] [stderr]   Downloaded serde v1.0.123
[INFO] [stderr]   Downloaded serde_json v1.0.61
[INFO] [stderr]   Downloaded proc-macro-hack v0.5.19
[INFO] [stderr]   Downloaded time-macros-impl v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "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] a2ba289c5eb00f6c6c17c2d9bf9006599c497211a93fd72fcd80db8911e1a191
[INFO] running `Command { std: "docker" "start" "-a" "a2ba289c5eb00f6c6c17c2d9bf9006599c497211a93fd72fcd80db8911e1a191", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a2ba289c5eb00f6c6c17c2d9bf9006599c497211a93fd72fcd80db8911e1a191", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2ba289c5eb00f6c6c17c2d9bf9006599c497211a93fd72fcd80db8911e1a191", kill_on_drop: false }`
[INFO] [stdout] a2ba289c5eb00f6c6c17c2d9bf9006599c497211a93fd72fcd80db8911e1a191
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] efc156f55bcf44f6aadeec428396c4c521d3c49297051e32316e1fbffe7a9c6f
[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" "efc156f55bcf44f6aadeec428396c4c521d3c49297051e32316e1fbffe7a9c6f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling libc v0.2.83
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling const_fn v0.4.5
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking strsim v0.9.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking libc v0.1.12
[INFO] [stderr]     Checking byteorder v1.4.2
[INFO] [stderr]    Compiling standback v0.2.14
[INFO] [stderr]     Checking thread_local v1.1.2
[INFO] [stderr]    Compiling time v0.2.25
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking mmap v0.1.1
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling time-macros-impl v0.1.1
[INFO] [stderr]     Checking time-macros v0.1.1
[INFO] [stderr]     Checking serde v1.0.123
[INFO] [stderr]     Checking docopt v1.1.0
[INFO] [stderr]     Checking COST v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::cmp::max`
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::cmp::max;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::max`
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::cmp::max;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/hilbert_curve.rs:32:18
[INFO] [stdout]    |
[INFO] [stdout] 32 |         for _ in (0..count) {
[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]   --> src/hilbert_curve.rs:32:18
[INFO] [stdout]    |
[INFO] [stdout] 32 |         for _ in (0..count) {
[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]    --> src/hilbert_curve.rs:248:18
[INFO] [stdout]     |
[INFO] [stdout] 248 |         for x in (0u32..256) {
[INFO] [stdout]     |                  ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/hilbert_curve.rs:248:18
[INFO] [stdout]     |
[INFO] [stdout] 248 |         for x in (0u32..256) {
[INFO] [stdout]     |                  ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/hilbert_curve.rs:249:22
[INFO] [stdout]     |
[INFO] [stdout] 249 |             for y in (0u32..256) {
[INFO] [stdout]     |                      ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/hilbert_curve.rs:271:18
[INFO] [stdout]     |
[INFO] [stdout] 271 |         for i in (0 .. 4) {
[INFO] [stdout]     |                  ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/hilbert_curve.rs:249:22
[INFO] [stdout]     |
[INFO] [stdout] 249 |             for y in (0u32..256) {
[INFO] [stdout]     |                      ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/hilbert_curve.rs:287:22
[INFO] [stdout]     |
[INFO] [stdout] 287 |         for log_s in (0u32 .. 4) {
[INFO] [stdout]     |                      ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/hilbert_curve.rs:310:22
[INFO] [stdout]     |
[INFO] [stdout] 310 |     for log_s_rev in (0 .. 32) {
[INFO] [stdout]     |                      ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/hilbert_curve.rs:271:18
[INFO] [stdout]     |
[INFO] [stdout] 271 |         for i in (0 .. 4) {
[INFO] [stdout]     |                  ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/hilbert_curve.rs:323:18
[INFO] [stdout]     |
[INFO] [stdout] 323 |     for log_s in (0 .. 32) {
[INFO] [stdout]     |                  ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/hilbert_curve.rs:287:22
[INFO] [stdout]     |
[INFO] [stdout] 287 |         for log_s in (0u32 .. 4) {
[INFO] [stdout]     |                      ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/main.rs:166:23
[INFO] [stdout]     |
[INFO] [stdout] 166 |     for _iteration in (0 .. 20) {
[INFO] [stdout]     |                       ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/hilbert_curve.rs:310:22
[INFO] [stdout]     |
[INFO] [stdout] 310 |     for log_s_rev in (0 .. 32) {
[INFO] [stdout]     |                      ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/main.rs:168:21
[INFO] [stdout]     |
[INFO] [stdout] 168 |         for node in (0 .. nodes) {
[INFO] [stdout]     |                     ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/hilbert_curve.rs:323:18
[INFO] [stdout]     |
[INFO] [stdout] 323 |     for log_s in (0 .. 32) {
[INFO] [stdout]     |                  ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/main.rs:166:23
[INFO] [stdout]     |
[INFO] [stdout] 166 |     for _iteration in (0 .. 20) {
[INFO] [stdout]     |                       ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/main.rs:212:14
[INFO] [stdout]     |
[INFO] [stdout] 212 |     for i in (0 .. roots.len()) { if i as u32 != roots[i] { non_roots += 1; }}
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/main.rs:168:21
[INFO] [stdout]     |
[INFO] [stdout] 168 |         for node in (0 .. nodes) {
[INFO] [stdout]     |                     ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/main.rs:237:14
[INFO] [stdout]     |
[INFO] [stdout] 237 |     for i in (0 .. label.len()) { if i as u32 != label[i] { non_roots += 1; }}
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/main.rs:212:14
[INFO] [stdout]     |
[INFO] [stdout] 212 |     for i in (0 .. roots.len()) { if i as u32 != roots[i] { non_roots += 1; }}
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/main.rs:237:14
[INFO] [stdout]     |
[INFO] [stdout] 237 |     for i in (0 .. label.len()) { if i as u32 != label[i] { non_roots += 1; }}
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `COST` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `cost`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `COST` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `cost`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 43.78s
[INFO] running `Command { std: "docker" "inspect" "efc156f55bcf44f6aadeec428396c4c521d3c49297051e32316e1fbffe7a9c6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efc156f55bcf44f6aadeec428396c4c521d3c49297051e32316e1fbffe7a9c6f", kill_on_drop: false }`
[INFO] [stdout] efc156f55bcf44f6aadeec428396c4c521d3c49297051e32316e1fbffe7a9c6f