[INFO] fetching crate icentral-test-largest-bcc-speedup 0.1.0...
[INFO] checking icentral-test-largest-bcc-speedup-0.1.0 against master#4eb62535fc12dd1a63fd43a4173e224e79313c4d for pr-158816
[INFO] extracting crate icentral-test-largest-bcc-speedup 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate icentral-test-largest-bcc-speedup 0.1.0
[INFO] finished tweaking crates.io crate icentral-test-largest-bcc-speedup 0.1.0
[INFO] tweaked toml for crates.io crate icentral-test-largest-bcc-speedup 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate icentral-test-largest-bcc-speedup 0.1.0 on toolchain 4eb62535fc12dd1a63fd43a4173e224e79313c4d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate icentral-test-largest-bcc-speedup 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3d5ced03c013a94a2f102a4510f48a6e9184255caf5fd8244f58017bde7f5210" "sleep" "infinity", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "inspect" "d8301c7512e41b9e15ebf5f35fd31ff44107f39fe3ec8b6ce0802db6d8562faa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "d8301c7512e41b9e15ebf5f35fd31ff44107f39fe3ec8b6ce0802db6d8562faa" "/opt/rustwide/cargo-home/bin/cargo" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "d8301c7512e41b9e15ebf5f35fd31ff44107f39fe3ec8b6ce0802db6d8562faa" "/opt/rustwide/cargo-home/bin/cargo" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/test_largest_bcc_speedup.rs:18:46
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut bcc_vec: Vec<GraphHash> = vec![];;
[INFO] [stdout]    |                                              ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/test_largest_bcc_speedup.rs:18:46
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut bcc_vec: Vec<GraphHash> = vec![];;
[INFO] [stdout]    |                                              ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]   --> src/test_largest_bcc_speedup.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 |     if let mut graph = graph.lock()? {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]    = help: consider replacing the `if let` with a `let`
[INFO] [stdout]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/test_largest_bcc_speedup.rs:129:9
[INFO] [stdout]     |
[INFO] [stdout] 129 |     let mut min:    f64 = 0.0;
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/test_largest_bcc_speedup.rs:130:9
[INFO] [stdout]     |
[INFO] [stdout] 130 |     let mut max:    f64 = 0.0;
[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/test_largest_bcc_speedup.rs:131:9
[INFO] [stdout]     |
[INFO] [stdout] 131 |     let mut median: f64 = 0.0;
[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/test_largest_bcc_speedup.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |     let mut mean:   f64 = 0.0;
[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/test_largest_bcc_speedup.rs:133:9
[INFO] [stdout]     |
[INFO] [stdout] 133 |     let mut stddev: f64 = 0.0;
[INFO] [stdout]     |         ----^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/test_largest_bcc_speedup.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     for i in 0..num_edges_to_insert {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `min`
[INFO] [stdout]    --> src/test_largest_bcc_speedup.rs:129:9
[INFO] [stdout]     |
[INFO] [stdout] 129 |     let mut min:    f64 = 0.0;
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_min`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `max`
[INFO] [stdout]    --> src/test_largest_bcc_speedup.rs:130:9
[INFO] [stdout]     |
[INFO] [stdout] 130 |     let mut max:    f64 = 0.0;
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_max`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `median`
[INFO] [stdout]    --> src/test_largest_bcc_speedup.rs:131:9
[INFO] [stdout]     |
[INFO] [stdout] 131 |     let mut median: f64 = 0.0;
[INFO] [stdout]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_median`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mean`
[INFO] [stdout]    --> src/test_largest_bcc_speedup.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |     let mut mean:   f64 = 0.0;
[INFO] [stdout]     |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mean`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stddev`
[INFO] [stdout]    --> src/test_largest_bcc_speedup.rs:133:9
[INFO] [stdout]     |
[INFO] [stdout] 133 |     let mut stddev: f64 = 0.0;
[INFO] [stdout]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_stddev`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `src` is never read
[INFO] [stdout]   --> src/test_largest_bcc_speedup.rs:67:31
[INFO] [stdout]    |
[INFO] [stdout] 67 |         let mut src: NodeId = NodeId::default();
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 74 |             src = nodeid![rng.generate::<usize>() % len];
[INFO] [stdout]    |             -------------------------------------------- `src` is overwritten here before the previous value is read
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `dst` is never read
[INFO] [stdout]   --> src/test_largest_bcc_speedup.rs:68:31
[INFO] [stdout]    |
[INFO] [stdout] 68 |         let mut dst: NodeId = NodeId::default();
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 75 |             dst = nodeid![rng.generate::<usize>() % len];
[INFO] [stdout]    |             -------------------------------------------- `dst` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `src` is never read
[INFO] [stdout]    --> src/test_largest_bcc_speedup.rs:99:31
[INFO] [stdout]     |
[INFO] [stdout]  99 |         let mut src: NodeId = NodeId::default();
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 102 |         src = rand_edge_vec[i].src;
[INFO] [stdout]     |         -------------------------- `src` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `dst` is never read
[INFO] [stdout]    --> src/test_largest_bcc_speedup.rs:100:31
[INFO] [stdout]     |
[INFO] [stdout] 100 |         let mut dst: NodeId = NodeId::default();
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 103 |         dst = rand_edge_vec[i].dst;
[INFO] [stdout]     |         -------------------------- `dst` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `long_iter_perc` is never read
[INFO] [stdout]    --> src/test_largest_bcc_speedup.rs:158:35
[INFO] [stdout]     |
[INFO] [stdout] 158 |     let mut long_iter_perc: f64 = 0.0;
[INFO] [stdout]     |                                   ^^^ this value is reassigned later and never used
[INFO] [stdout] 159 |
[INFO] [stdout] 160 |     long_iter_perc = 120.0;
[INFO] [stdout]     |     ---------------------- `long_iter_perc` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]   --> src/test_largest_bcc_speedup.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 |     if let mut graph = graph.lock()? {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]    = help: consider replacing the `if let` with a `let`
[INFO] [stdout]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/test_largest_bcc_speedup.rs:129:9
[INFO] [stdout]     |
[INFO] [stdout] 129 |     let mut min:    f64 = 0.0;
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/test_largest_bcc_speedup.rs:130:9
[INFO] [stdout]     |
[INFO] [stdout] 130 |     let mut max:    f64 = 0.0;
[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/test_largest_bcc_speedup.rs:131:9
[INFO] [stdout]     |
[INFO] [stdout] 131 |     let mut median: f64 = 0.0;
[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/test_largest_bcc_speedup.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |     let mut mean:   f64 = 0.0;
[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/test_largest_bcc_speedup.rs:133:9
[INFO] [stdout]     |
[INFO] [stdout] 133 |     let mut stddev: f64 = 0.0;
[INFO] [stdout]     |         ----^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/test_largest_bcc_speedup.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     for i in 0..num_edges_to_insert {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `min`
[INFO] [stdout]    --> src/test_largest_bcc_speedup.rs:129:9
[INFO] [stdout]     |
[INFO] [stdout] 129 |     let mut min:    f64 = 0.0;
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_min`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `max`
[INFO] [stdout]    --> src/test_largest_bcc_speedup.rs:130:9
[INFO] [stdout]     |
[INFO] [stdout] 130 |     let mut max:    f64 = 0.0;
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_max`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `median`
[INFO] [stdout]    --> src/test_largest_bcc_speedup.rs:131:9
[INFO] [stdout]     |
[INFO] [stdout] 131 |     let mut median: f64 = 0.0;
[INFO] [stdout]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_median`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mean`
[INFO] [stdout]    --> src/test_largest_bcc_speedup.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |     let mut mean:   f64 = 0.0;
[INFO] [stdout]     |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mean`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stddev`
[INFO] [stdout]    --> src/test_largest_bcc_speedup.rs:133:9
[INFO] [stdout]     |
[INFO] [stdout] 133 |     let mut stddev: f64 = 0.0;
[INFO] [stdout]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_stddev`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `src` is never read
[INFO] [stdout]   --> src/test_largest_bcc_speedup.rs:67:31
[INFO] [stdout]    |
[INFO] [stdout] 67 |         let mut src: NodeId = NodeId::default();
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 74 |             src = nodeid![rng.generate::<usize>() % len];
[INFO] [stdout]    |             -------------------------------------------- `src` is overwritten here before the previous value is read
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `dst` is never read
[INFO] [stdout]   --> src/test_largest_bcc_speedup.rs:68:31
[INFO] [stdout]    |
[INFO] [stdout] 68 |         let mut dst: NodeId = NodeId::default();
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 75 |             dst = nodeid![rng.generate::<usize>() % len];
[INFO] [stdout]    |             -------------------------------------------- `dst` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `src` is never read
[INFO] [stdout]    --> src/test_largest_bcc_speedup.rs:99:31
[INFO] [stdout]     |
[INFO] [stdout]  99 |         let mut src: NodeId = NodeId::default();
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 102 |         src = rand_edge_vec[i].src;
[INFO] [stdout]     |         -------------------------- `src` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `dst` is never read
[INFO] [stdout]    --> src/test_largest_bcc_speedup.rs:100:31
[INFO] [stdout]     |
[INFO] [stdout] 100 |         let mut dst: NodeId = NodeId::default();
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 103 |         dst = rand_edge_vec[i].dst;
[INFO] [stdout]     |         -------------------------- `dst` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `long_iter_perc` is never read
[INFO] [stdout]    --> src/test_largest_bcc_speedup.rs:158:35
[INFO] [stdout]     |
[INFO] [stdout] 158 |     let mut long_iter_perc: f64 = 0.0;
[INFO] [stdout]     |                                   ^^^ this value is reassigned later and never used
[INFO] [stdout] 159 |
[INFO] [stdout] 160 |     long_iter_perc = 120.0;
[INFO] [stdout]     |     ---------------------- `long_iter_perc` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 50.89s
[INFO] running `Command { std: "docker" "inspect" "d8301c7512e41b9e15ebf5f35fd31ff44107f39fe3ec8b6ce0802db6d8562faa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8301c7512e41b9e15ebf5f35fd31ff44107f39fe3ec8b6ce0802db6d8562faa", kill_on_drop: false }`
[INFO] [stdout] d8301c7512e41b9e15ebf5f35fd31ff44107f39fe3ec8b6ce0802db6d8562faa
