[INFO] cloning repository https://github.com/CheukNgai/PageRank_Timely
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/CheukNgai/PageRank_Timely" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCheukNgai%2FPageRank_Timely", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCheukNgai%2FPageRank_Timely'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2828a9534788794f7c93d9d888eb8170488b1a7c
[INFO] checking CheukNgai/PageRank_Timely against beta-2020-07-24 for pr-75494-beta
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCheukNgai%2FPageRank_Timely" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
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[INFO] validating manifest of git repo https://github.com/CheukNgai/PageRank_Timely on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/CheukNgai/PageRank_Timely
[INFO] finished tweaking git repo https://github.com/CheukNgai/PageRank_Timely
[INFO] tweaked toml for git repo https://github.com/CheukNgai/PageRank_Timely written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/CheukNgai/PageRank_Timely already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "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] 92d07dc443acc5c56b9614a6bc31e57589b6772e1f4b596b3cb94e718dbb31f6
[INFO] running `Command { std: "docker" "start" "-a" "92d07dc443acc5c56b9614a6bc31e57589b6772e1f4b596b3cb94e718dbb31f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "92d07dc443acc5c56b9614a6bc31e57589b6772e1f4b596b3cb94e718dbb31f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92d07dc443acc5c56b9614a6bc31e57589b6772e1f4b596b3cb94e718dbb31f6", kill_on_drop: false }`
[INFO] [stdout] 92d07dc443acc5c56b9614a6bc31e57589b6772e1f4b596b3cb94e718dbb31f6
[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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 67914d738fced2cc1219d5284c8e7b20b491bb01f56876b6a6a6de550b4c283a
[INFO] running `Command { std: "docker" "start" "-a" "67914d738fced2cc1219d5284c8e7b20b491bb01f56876b6a6a6de550b4c283a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking byteorder v1.2.3
[INFO] [stderr]     Checking abomonation v0.5.0
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking timely_sort v0.1.6
[INFO] [stderr]     Checking file v1.1.2
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]     Checking getopts v0.2.18
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]     Checking rand v0.5.4
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]    Compiling abomonation_derive v0.3.0
[INFO] [stderr]     Checking timely_communication v0.6.0
[INFO] [stderr]     Checking timely v0.6.0
[INFO] [stderr]     Checking pagerank v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/main.rs:197:13
[INFO] [stdout]     |
[INFO] [stdout] 197 |             if (index == 0) {
[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 `if` condition
[INFO] [stdout]    --> src/main.rs:197:13
[INFO] [stdout]     |
[INFO] [stdout] 197 |             if (index == 0) {
[INFO] [stdout]     |                ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `diff`
[INFO] [stdout]    --> src/main.rs:115:43
[INFO] [stdout]     |
[INFO] [stdout] 115 | ...                   for (dst, diff) in rank_changes.iter_mut() {
[INFO] [stdout]     |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_diff`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `diff`
[INFO] [stdout]    --> src/main.rs:115:43
[INFO] [stdout]     |
[INFO] [stdout] 115 | ...                   for (dst, diff) in rank_changes.iter_mut() {
[INFO] [stdout]     |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_diff`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:95:36
[INFO] [stdout]    |
[INFO] [stdout] 95 | ...                            let mut delta = ranks[src].clone();
[INFO] [stdout]    |                                    ----^^^^^
[INFO] [stdout]    |                                    |
[INFO] [stdout]    |                                    help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:138:41
[INFO] [stdout]     |
[INFO] [stdout] 138 | ...                   let mut dst_num = dsts.len();
[INFO] [stdout]     |                           ----^^^^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:140:45
[INFO] [stdout]     |
[INFO] [stdout] 140 | ...                   let mut delta = ranks[src].clone() / dst_num as f32;
[INFO] [stdout]     |                           ----^^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:163:13
[INFO] [stdout]     |
[INFO] [stdout] 163 |         let mut round = 0;
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:187:6
[INFO] [stdout]     |
[INFO] [stdout] 187 |     let mut file = BufReader::new(&f);
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:192:13
[INFO] [stdout]     |
[INFO] [stdout] 192 |         let mut tuple = l.split_whitespace();
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:209:9
[INFO] [stdout]     |
[INFO] [stdout] 209 |     let mut node_number = node_list.len();
[INFO] [stdout]     |         ----^^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `default_PR` should have a snake case name
[INFO] [stdout]   --> src/main.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |         let default_PR:f32 = 1.0 / node_number as f32;
[INFO] [stdout]    |             ^^^^^^^^^^ help: convert the identifier to snake case: `default_pr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:95:36
[INFO] [stdout]    |
[INFO] [stdout] 95 | ...                            let mut delta = ranks[src].clone();
[INFO] [stdout]    |                                    ----^^^^^
[INFO] [stdout]    |                                    |
[INFO] [stdout]    |                                    help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:138:41
[INFO] [stdout]     |
[INFO] [stdout] 138 | ...                   let mut dst_num = dsts.len();
[INFO] [stdout]     |                           ----^^^^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:140:45
[INFO] [stdout]     |
[INFO] [stdout] 140 | ...                   let mut delta = ranks[src].clone() / dst_num as f32;
[INFO] [stdout]     |                           ----^^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:163:13
[INFO] [stdout]     |
[INFO] [stdout] 163 |         let mut round = 0;
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:187:6
[INFO] [stdout]     |
[INFO] [stdout] 187 |     let mut file = BufReader::new(&f);
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:192:13
[INFO] [stdout]     |
[INFO] [stdout] 192 |         let mut tuple = l.split_whitespace();
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:209:9
[INFO] [stdout]     |
[INFO] [stdout] 209 |     let mut node_number = node_list.len();
[INFO] [stdout]     |         ----^^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `default_PR` should have a snake case name
[INFO] [stdout]   --> src/main.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |         let default_PR:f32 = 1.0 / node_number as f32;
[INFO] [stdout]    |             ^^^^^^^^^^ help: convert the identifier to snake case: `default_pr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.48s
[INFO] running `Command { std: "docker" "inspect" "67914d738fced2cc1219d5284c8e7b20b491bb01f56876b6a6a6de550b4c283a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67914d738fced2cc1219d5284c8e7b20b491bb01f56876b6a6a6de550b4c283a", kill_on_drop: false }`
[INFO] [stdout] 67914d738fced2cc1219d5284c8e7b20b491bb01f56876b6a6a6de550b4c283a
