[INFO] fetching crate spokes 0.1.0...
[INFO] building spokes-0.1.0 against master#ad85bc524b1ad696e42061ad8338d382dffbdbe5 for pr-146237-1
[INFO] extracting crate spokes 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate spokes 0.1.0
[INFO] finished tweaking crates.io crate spokes 0.1.0
[INFO] tweaked toml for crates.io crate spokes 0.1.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate spokes 0.1.0 on toolchain ad85bc524b1ad696e42061ad8338d382dffbdbe5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate spokes 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" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num v0.4.0
[INFO] [stderr]   Downloaded priority-queue v1.2.1
[INFO] [stderr]   Downloaded num-rational v0.4.0
[INFO] [stderr]   Downloaded num-complex v0.4.0
[INFO] [stderr]   Downloaded num-bigint v0.4.3
[INFO] [stderr]   Downloaded indexmap v1.8.0
[INFO] [stderr]   Downloaded serde v1.0.136
[INFO] [stderr]   Downloaded libc v0.2.121
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9744c5dd729ac97b5bdf5b5ad566fb1bbaab3d10ad537b25338de0aa3a2e5b9a
[INFO] running `Command { std: "docker" "start" "-a" "9744c5dd729ac97b5bdf5b5ad566fb1bbaab3d10ad537b25338de0aa3a2e5b9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9744c5dd729ac97b5bdf5b5ad566fb1bbaab3d10ad537b25338de0aa3a2e5b9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9744c5dd729ac97b5bdf5b5ad566fb1bbaab3d10ad537b25338de0aa3a2e5b9a", kill_on_drop: false }`
[INFO] [stdout] 9744c5dd729ac97b5bdf5b5ad566fb1bbaab3d10ad537b25338de0aa3a2e5b9a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9b4c2d9c88699bf0b0639b74f4bcbb32d1abab757b3a580b101e014fdc6009e2
[INFO] running `Command { std: "docker" "start" "-a" "9b4c2d9c88699bf0b0639b74f4bcbb32d1abab757b3a580b101e014fdc6009e2", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.121
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling priority-queue v1.2.1
[INFO] [stderr]    Compiling flate2 v1.0.22
[INFO] [stderr]    Compiling num-complex v0.4.0
[INFO] [stderr]    Compiling num v0.4.0
[INFO] [stderr]    Compiling spokes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]   --> src/arc_storage/forward_star.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     #[must_use]
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = help: `#[must_use]` can be applied to data types, functions, unions, required trait methods, provided trait methods, inherent methods, foreign functions, and traits
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `distance_unit_arcs` is never used
[INFO] [stdout]    --> src/algorithms.rs:708:4
[INFO] [stdout]     |
[INFO] [stdout] 708 | fn distance_unit_arcs<I, NA, T, AS>(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `shortest_augmenting_path_flow` is never used
[INFO] [stdout]    --> src/algorithms.rs:789:4
[INFO] [stdout]     |
[INFO] [stdout] 789 | fn shortest_augmenting_path_flow<I, NA, T, AS>(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pred_to_path` is never used
[INFO] [stdout]    --> src/algorithms.rs:851:4
[INFO] [stdout]     |
[INFO] [stdout] 851 | fn pred_to_path<'a, I: Hash + Eq>(pred: &'a HashMap<I, I>, start: &'a I) -> Vec<(&'a I, &'a I)> {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `augment` is never used
[INFO] [stdout]    --> src/algorithms.rs:865:4
[INFO] [stdout]     |
[INFO] [stdout] 865 | fn augment<I, T, NA, AS>(
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `admissible_arc` is never used
[INFO] [stdout]    --> src/algorithms.rs:925:4
[INFO] [stdout]     |
[INFO] [stdout] 925 | fn admissible_arc<'a, I, T, AS>(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.81s
[INFO] running `Command { std: "docker" "inspect" "9b4c2d9c88699bf0b0639b74f4bcbb32d1abab757b3a580b101e014fdc6009e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b4c2d9c88699bf0b0639b74f4bcbb32d1abab757b3a580b101e014fdc6009e2", kill_on_drop: false }`
[INFO] [stdout] 9b4c2d9c88699bf0b0639b74f4bcbb32d1abab757b3a580b101e014fdc6009e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2486c228f18417051a955129aca834cb13e28be9472daefadb4732e1f4228ea7
[INFO] running `Command { std: "docker" "start" "-a" "2486c228f18417051a955129aca834cb13e28be9472daefadb4732e1f4228ea7", kill_on_drop: false }`
[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]   --> src/arc_storage/forward_star.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     #[must_use]
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = help: `#[must_use]` can be applied to data types, functions, unions, required trait methods, provided trait methods, inherent methods, foreign functions, and traits
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `distance_unit_arcs` is never used
[INFO] [stdout]    --> src/algorithms.rs:708:4
[INFO] [stdout]     |
[INFO] [stdout] 708 | fn distance_unit_arcs<I, NA, T, AS>(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `shortest_augmenting_path_flow` is never used
[INFO] [stdout]    --> src/algorithms.rs:789:4
[INFO] [stdout]     |
[INFO] [stdout] 789 | fn shortest_augmenting_path_flow<I, NA, T, AS>(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pred_to_path` is never used
[INFO] [stdout]    --> src/algorithms.rs:851:4
[INFO] [stdout]     |
[INFO] [stdout] 851 | fn pred_to_path<'a, I: Hash + Eq>(pred: &'a HashMap<I, I>, start: &'a I) -> Vec<(&'a I, &'a I)> {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `augment` is never used
[INFO] [stdout]    --> src/algorithms.rs:865:4
[INFO] [stdout]     |
[INFO] [stdout] 865 | fn augment<I, T, NA, AS>(
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `admissible_arc` is never used
[INFO] [stdout]    --> src/algorithms.rs:925:4
[INFO] [stdout]     |
[INFO] [stdout] 925 | fn admissible_arc<'a, I, T, AS>(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling spokes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]   --> src/arc_storage/forward_star.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     #[must_use]
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = help: `#[must_use]` can be applied to data types, functions, unions, required trait methods, provided trait methods, inherent methods, foreign functions, and traits
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Network` that must be used
[INFO] [stdout]     --> src/algorithms.rs:1027:13
[INFO] [stdout]      |
[INFO] [stdout] 1027 |             dbg!(max_flow_residual);
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[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] 1027 |             let _ = dbg!(max_flow_residual);
[INFO] [stdout]      |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.82s
[INFO] running `Command { std: "docker" "inspect" "2486c228f18417051a955129aca834cb13e28be9472daefadb4732e1f4228ea7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2486c228f18417051a955129aca834cb13e28be9472daefadb4732e1f4228ea7", kill_on_drop: false }`
[INFO] [stdout] 2486c228f18417051a955129aca834cb13e28be9472daefadb4732e1f4228ea7