[INFO] fetching crate icentral-operation-update 0.1.0...
[INFO] checking icentral-operation-update-0.1.0 against 4fcf39725a9c99bd495d8c73af83628a256ff9a9 for pr-162233-crater-rollup
[INFO] extracting crate icentral-operation-update 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate icentral-operation-update 0.1.0
[INFO] finished tweaking crates.io crate icentral-operation-update 0.1.0
[INFO] tweaked toml for crates.io crate icentral-operation-update 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate icentral-operation-update 0.1.0 on toolchain 4fcf39725a9c99bd495d8c73af83628a256ff9a9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4fcf39725a9c99bd495d8c73af83628a256ff9a9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate icentral-operation-update 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" "+4fcf39725a9c99bd495d8c73af83628a256ff9a9" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: explicit `package.readme` can be inferred
[INFO] [stderr]   --> Cargo.toml:63:1
[INFO] [stderr]    |
[INFO] [stderr] 63 | readme = "README.md"
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::manual_readme` is set to `warn` by default
[INFO] [stderr] help: consider removing `package.readme`
[INFO] [stderr] warning: `icentral-operation-update` (manifest) generated 1 warning
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded icentral-scores v0.1.0
[INFO] [stderr]   Downloaded icentral-workspace v0.1.0
[INFO] [stderr]   Downloaded icentral-operation v0.1.0
[INFO] [stderr]   Downloaded icentral-scratch v0.1.0
[INFO] [stderr]   Downloaded icentral-pair-dependencies v0.1.0
[INFO] [stderr]   Downloaded icentral-bc-mem v0.1.0
[INFO] [stderr]   Downloaded icentral-node-stack v0.1.0
[INFO] [stderr]   Downloaded icentral-deltas v0.1.0
[INFO] [stderr]   Downloaded icentral-subgraph-map v0.1.0
[INFO] [stderr]   Downloaded icentral-node-queue v0.1.0
[INFO] [stderr]   Downloaded icentral-mucid-map v0.1.0
[INFO] [stderr]   Downloaded icentral-articulation-point-map v0.1.0
[INFO] [stderr]   Downloaded icentral-conn-vertex-map v0.1.0
[INFO] [stderr]   Downloaded icentral-timer v0.1.0
[INFO] [stderr]   Downloaded icentral-bridge-edges v0.1.0
[INFO] [stderr]   Downloaded icentral-articulation-point v0.1.0
[INFO] [stderr]   Downloaded mpi-sys v0.2.2
[INFO] [stderr]   Downloaded icentral-gen-rand-edges v0.1.0
[INFO] [stderr]   Downloaded icentral-mock v0.1.0
[INFO] [stderr]   Downloaded build-probe-mpi v0.1.4
[INFO] [stderr]   Downloaded disable_macro v0.3.6
[INFO] [stderr]   Downloaded icentral-rbfs v0.1.0
[INFO] [stderr]   Downloaded icentral-graph v0.1.0
[INFO] [stderr]   Downloaded icentral-subgraph v0.1.0
[INFO] [stderr]   Downloaded icentral-brandes v0.1.0
[INFO] [stderr]   Downloaded libffi v3.2.0
[INFO] [stderr]   Downloaded conv v0.3.3
[INFO] [stderr]   Downloaded icentral-timing-update v0.1.0
[INFO] [stderr]   Downloaded icentral-workspace-map v0.1.0
[INFO] [stderr]   Downloaded icentral-graph-hash v0.1.0
[INFO] [stderr]   Downloaded icentral-test-incremental-brandes v0.1.0
[INFO] [stderr]   Downloaded icentral-muc v0.1.0
[INFO] [stderr]   Downloaded icentral-component v0.1.0
[INFO] [stderr]   Downloaded icentral-bbfs v0.1.0
[INFO] [stderr]   Downloaded icentral-calculate-bc-mem v0.1.0
[INFO] [stderr]   Downloaded icentral-test-fuad v0.1.0
[INFO] [stderr]   Downloaded icentral-test-brandes v0.1.0
[INFO] [stderr]   Downloaded icentral-test-qube v0.1.0
[INFO] [stderr]   Downloaded icentral-qube v0.1.0
[INFO] [stderr]   Downloaded icentral-partial-bbfs v0.1.0
[INFO] [stderr]   Downloaded libloading v0.8.5
[INFO] [stderr]   Downloaded icentral-delta v0.1.0
[INFO] [stderr]   Downloaded icentral-alg v0.1.0
[INFO] [stderr]   Downloaded icentral-test-incremental-qube v0.1.0
[INFO] [stderr]   Downloaded prettyplease v0.2.22
[INFO] [stderr]   Downloaded mpi v0.8.0
[INFO] [stderr]   Downloaded cc v1.1.18
[INFO] [stderr]   Downloaded bindgen v0.69.4
[INFO] [stderr]   Downloaded libffi-sys v2.3.0
[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@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] c4d1f25bc062e4409b6fe945ea9a26b17d7a4830067321e1481cd0a9776f740d
[INFO] running `Command { std: "docker" "start" "c4d1f25bc062e4409b6fe945ea9a26b17d7a4830067321e1481cd0a9776f740d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c4d1f25bc062e4409b6fe945ea9a26b17d7a4830067321e1481cd0a9776f740d", 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" "c4d1f25bc062e4409b6fe945ea9a26b17d7a4830067321e1481cd0a9776f740d" "/opt/rustwide/cargo-home/bin/cargo" "+4fcf39725a9c99bd495d8c73af83628a256ff9a9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c4d1f25bc062e4409b6fe945ea9a26b17d7a4830067321e1481cd0a9776f740d", 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" "-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" "c4d1f25bc062e4409b6fe945ea9a26b17d7a4830067321e1481cd0a9776f740d" "/opt/rustwide/cargo-home/bin/cargo" "+4fcf39725a9c99bd495d8c73af83628a256ff9a9" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: explicit `package.readme` can be inferred
[INFO] [stderr]   --> Cargo.toml:63:1
[INFO] [stderr]    |
[INFO] [stderr] 63 | readme = "README.md"
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::manual_readme` is set to `warn` by default
[INFO] [stderr] help: consider removing `package.readme`
[INFO] [stderr] warning: `icentral-operation-update` (manifest) generated 1 warning
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]    Compiling libc v0.2.158
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]    Compiling once_cell v1.19.0
[INFO] [stderr]    Compiling smallvec v1.13.2
[INFO] [stderr]    Compiling log v0.4.22
[INFO] [stderr]    Compiling serde v1.0.210
[INFO] [stderr]    Compiling serde_json v1.0.128
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling regex-syntax v0.6.29
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]    Compiling regex-syntax v0.8.4
[INFO] [stderr]    Compiling hashbrown v0.14.5
[INFO] [stderr]    Compiling pin-project-lite v0.2.14
[INFO] [stderr]    Compiling overload v0.1.1
[INFO] [stderr]    Compiling nu-ansi-term v0.46.0
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling either v1.13.0
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]     Checking itoa v1.0.11
[INFO] [stderr]    Compiling tracing-core v0.1.32
[INFO] [stderr]    Compiling thread_local v1.1.8
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[INFO] [stderr]    Compiling rustix v0.38.36
[INFO] [stderr]     Checking bytemuck v1.18.0
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[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking num-rational v0.4.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking crossbeam-queue v0.3.11
[INFO] [stderr]    Compiling case v0.1.0
[INFO] [stderr]    Compiling derive-error v0.0.5
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]    Compiling tempfile v3.12.0
[INFO] [stderr]    Compiling regex v1.10.6
[INFO] [stderr]     Checking crossbeam v0.8.4
[INFO] [stderr]     Checking colored v2.1.0
[INFO] [stderr]     Checking ordered-float v3.9.2
[INFO] [stderr]     Checking roaring v0.10.6
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]     Checking owned-alloc v0.2.0
[INFO] [stderr]     Checking lockfree v0.5.1
[INFO] [stderr]     Checking pbx v0.1.0
[INFO] [stderr]     Checking nanorand v0.7.0
[INFO] [stderr]     Checking simba v0.7.3
[INFO] [stderr]     Checking text_io v0.1.12
[INFO] [stderr]    Compiling toml v0.5.11
[INFO] [stderr]     Checking float-ord v0.3.2
[INFO] [stderr]     Checking queue v0.3.1
[INFO] [stderr]     Checking renew-traits v0.1.0
[INFO] [stderr]    Compiling delegate v0.10.0
[INFO] [stderr]    Compiling nalgebra-macros v0.1.0
[INFO] [stderr]    Compiling disable_macro v0.3.6
[INFO] [stderr]    Compiling serde_derive v1.0.210
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling thiserror-impl v1.0.63
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling tracing v0.1.40
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]    Compiling tracing-subscriber v0.3.18
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking nalgebra v0.31.4
[INFO] [stderr]    Compiling scan-crate-for-typedefs v0.6.0
[INFO] [stderr]    Compiling traced-test v0.3.6
[INFO] [stderr]    Compiling error-tree v0.3.6
[INFO] [stderr]    Compiling icentral-3p v0.1.0
[INFO] [stderr]     Checking tracing-serde v0.1.3
[INFO] [stderr]     Checking deranged v0.3.11
[INFO] [stderr]     Checking language-enum v0.1.0
[INFO] [stderr]     Checking time v0.3.36
[INFO] [stderr]     Checking named-item v0.1.0
[INFO] [stderr]     Checking tracing-setup v0.3.6
[INFO] [stderr]     Checking dachshund v0.1.10
[INFO] [stderr]     Checking icentral-nodeid v0.1.0
[INFO] [stderr]     Checking icentral-stats v0.1.0
[INFO] [stderr]     Checking icentral-timer v0.1.0
[INFO] [stderr]     Checking icentral-operation v0.1.0
[INFO] [stderr]     Checking icentral-mindexed-map v0.1.0
[INFO] [stderr]     Checking icentral-mucid v0.1.0
[INFO] [stderr]     Checking icentral-node-stack v0.1.0
[INFO] [stderr]     Checking icentral-node-queue v0.1.0
[INFO] [stderr]     Checking icentral-distances v0.1.0
[INFO] [stderr]     Checking icentral-color-map v0.1.0
[INFO] [stderr]     Checking icentral-predecessor-map v0.1.0
[INFO] [stderr]     Checking icentral-visit-markers v0.1.0
[INFO] [stderr]     Checking icentral-sigmas v0.1.0
[INFO] [stderr]     Checking icentral-path-counts v0.1.0
[INFO] [stderr]     Checking icentral-pair-dependencies v0.1.0
[INFO] [stderr]     Checking icentral-conn-vertex-map v0.1.0
[INFO] [stderr]     Checking icentral-subgraph-map v0.1.0
[INFO] [stderr]     Checking icentral-articulation-point-map v0.1.0
[INFO] [stderr]     Checking icentral-deltas v0.1.0
[INFO] [stderr]     Checking icentral-edge v0.1.0
[INFO] [stderr]     Checking icentral-errors v0.1.0
[INFO] [stderr]     Checking icentral-neighbors v0.1.0
[INFO] [stderr]     Checking icentral-label-map v0.1.0
[INFO] [stderr]     Checking icentral-articulation-point v0.1.0
[INFO] [stderr]     Checking icentral-edges v0.1.0
[INFO] [stderr]     Checking icentral-cycle v0.1.0
[INFO] [stderr]     Checking icentral-bcc v0.1.0
[INFO] [stderr]     Checking icentral-graph-interface v0.1.0
[INFO] [stderr]     Checking icentral-parents-map v0.1.0
[INFO] [stderr]     Checking icentral-scores v0.1.0
[INFO] [stderr]     Checking icentral-mucid-map v0.1.0
[INFO] [stderr]     Checking icentral-bridge-edges v0.1.0
[INFO] [stderr]     Checking icentral-mock v0.1.0
[INFO] [stderr]     Checking icentral-gen-rand-edges v0.1.0
[INFO] [stderr]     Checking icentral-bc-mem v0.1.0
[INFO] [stderr]     Checking icentral-subgraph v0.1.0
[INFO] [stderr]     Checking icentral-component v0.1.0
[INFO] [stderr]     Checking icentral-scratch v0.1.0
[INFO] [stderr]     Checking icentral-workspace v0.1.0
[INFO] [stderr]     Checking icentral-rbfs v0.1.0
[INFO] [stderr]     Checking icentral-bbfs v0.1.0
[INFO] [stderr]     Checking icentral-partial-bbfs v0.1.0
[INFO] [stderr]     Checking icentral-brandes v0.1.0
[INFO] [stderr]     Checking icentral-workspace-map v0.1.0
[INFO] [stderr]     Checking icentral-muc v0.1.0
[INFO] [stderr]     Checking icentral-delta v0.1.0
[INFO] [stderr]     Checking icentral-graph v0.1.0
[INFO] [stderr]     Checking icentral-qube v0.1.0
[INFO] [stderr]     Checking icentral-graph-hash v0.1.0
[INFO] [stderr]     Checking icentral-calculate-bc-mem v0.1.0
[INFO] [stderr]     Checking icentral-test-fuad v0.1.0
[INFO] [stderr]     Checking icentral-test-incremental-brandes v0.1.0
[INFO] [stderr]     Checking icentral-test-brandes v0.1.0
[INFO] [stderr]     Checking icentral-test-incremental-qube v0.1.0
[INFO] [stderr]     Checking icentral-timing-update v0.1.0
[INFO] [stderr]     Checking icentral-test-qube v0.1.0
[INFO] [stderr]     Checking icentral-alg v0.1.0
[INFO] [stderr]     Checking icentral-operation-update v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/update.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     mut edge:    Edge,
[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/update.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let mut component = Component::new_from_graph_ref(graph, "update_bc_for_graph::component");
[INFO] [stdout]    |         ----^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `comp_type`
[INFO] [stdout]  --> src/update.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     comp_type:   CompType,
[INFO] [stdout]   |     ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_comp_type`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]    --> src/update.rs:144:8
[INFO] [stdout]     |
[INFO] [stdout] 144 |     if let component = component.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: unused variable: `comp_type`
[INFO] [stdout]    --> src/update.rs:105:5
[INFO] [stdout]     |
[INFO] [stdout] 105 |     comp_type:   CompType,
[INFO] [stdout]     |     ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_comp_type`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/update.rs:182:5
[INFO] [stdout]     |
[INFO] [stdout] 182 |     mut edge:    Edge,
[INFO] [stdout]     |     ----^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/update.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |             graph.find_edge_bcc_with_component(component, edge);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 69 |             let _ = graph.find_edge_bcc_with_component(component, edge);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/update.rs:78:13
[INFO] [stdout]    |
[INFO] [stdout] 78 |             graph.remove_edge(&edge);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 78 |             let _ = graph.remove_edge(&edge);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/update.rs:79:13
[INFO] [stdout]    |
[INFO] [stdout] 79 |             graph.find_edge_bcc_with_component(component, edge);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 79 |             let _ = graph.find_edge_bcc_with_component(component, edge);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/update.rs:80:13
[INFO] [stdout]    |
[INFO] [stdout] 80 |             graph.insert_edge(&edge);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 80 |             let _ = graph.insert_edge(&edge);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/update.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     mut edge:    Edge,
[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/update.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let mut component = Component::new_from_graph_ref(graph, "update_bc_for_graph::component");
[INFO] [stdout]    |         ----^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `comp_type`
[INFO] [stdout]  --> src/update.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     comp_type:   CompType,
[INFO] [stdout]   |     ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_comp_type`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]    --> src/update.rs:144:8
[INFO] [stdout]     |
[INFO] [stdout] 144 |     if let component = component.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: unused variable: `comp_type`
[INFO] [stdout]    --> src/update.rs:105:5
[INFO] [stdout]     |
[INFO] [stdout] 105 |     comp_type:   CompType,
[INFO] [stdout]     |     ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_comp_type`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/update.rs:182:5
[INFO] [stdout]     |
[INFO] [stdout] 182 |     mut edge:    Edge,
[INFO] [stdout]     |     ----^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/update.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |             graph.find_edge_bcc_with_component(component, edge);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 69 |             let _ = graph.find_edge_bcc_with_component(component, edge);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/update.rs:78:13
[INFO] [stdout]    |
[INFO] [stdout] 78 |             graph.remove_edge(&edge);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 78 |             let _ = graph.remove_edge(&edge);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/update.rs:79:13
[INFO] [stdout]    |
[INFO] [stdout] 79 |             graph.find_edge_bcc_with_component(component, edge);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 79 |             let _ = graph.find_edge_bcc_with_component(component, edge);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/update.rs:80:13
[INFO] [stdout]    |
[INFO] [stdout] 80 |             graph.insert_edge(&edge);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 80 |             let _ = graph.insert_edge(&edge);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 11s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.11.11
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "c4d1f25bc062e4409b6fe945ea9a26b17d7a4830067321e1481cd0a9776f740d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4d1f25bc062e4409b6fe945ea9a26b17d7a4830067321e1481cd0a9776f740d", kill_on_drop: false }`
[INFO] [stdout] c4d1f25bc062e4409b6fe945ea9a26b17d7a4830067321e1481cd0a9776f740d
