[INFO] fetching crate hibitgraph 0.1.0...
[INFO] checking hibitgraph-0.1.0 against master#430feb24a46993e5073c1bb1b39da190d83fa2bf for pr-78363
[INFO] extracting crate hibitgraph 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate hibitgraph 0.1.0 on toolchain 430feb24a46993e5073c1bb1b39da190d83fa2bf
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+430feb24a46993e5073c1bb1b39da190d83fa2bf" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate hibitgraph 0.1.0
[INFO] finished tweaking crates.io crate hibitgraph 0.1.0
[INFO] tweaked toml for crates.io crate hibitgraph 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+430feb24a46993e5073c1bb1b39da190d83fa2bf" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+430feb24a46993e5073c1bb1b39da190d83fa2bf" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+430feb24a46993e5073c1bb1b39da190d83fa2bf" "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] 7b86a7a51db380a1946cc1efa2adf24aa05c8cf6d2225e7249488e9ac9fdc2c8
[INFO] running `Command { std: "docker" "start" "-a" "7b86a7a51db380a1946cc1efa2adf24aa05c8cf6d2225e7249488e9ac9fdc2c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b86a7a51db380a1946cc1efa2adf24aa05c8cf6d2225e7249488e9ac9fdc2c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b86a7a51db380a1946cc1efa2adf24aa05c8cf6d2225e7249488e9ac9fdc2c8", kill_on_drop: false }`
[INFO] [stdout] 7b86a7a51db380a1946cc1efa2adf24aa05c8cf6d2225e7249488e9ac9fdc2c8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+430feb24a46993e5073c1bb1b39da190d83fa2bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 722a35712d9c55349e5bbe4d211a38f3625504884e2dfcc72d28ea2923c84ed5
[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" "722a35712d9c55349e5bbe4d211a38f3625504884e2dfcc72d28ea2923c84ed5", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]     Checking bit-vec v0.4.4
[INFO] [stderr]     Checking regex-syntax v0.6.20
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking hibitset v0.6.3
[INFO] [stderr]     Checking bit-set v0.4.0
[INFO] [stderr]     Checking hibitgraph v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `r` is never read
[INFO] [stdout]    --> src/lib.rs:246:17
[INFO] [stdout]     |
[INFO] [stdout] 246 |             let mut r = None;
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking bstr v0.2.14
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking plotters v0.2.15
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking regex v1.4.1
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]     Checking criterion v0.3.3
[INFO] [stdout] warning: unused import: `DfsIterator`
[INFO] [stdout]    --> src/lib.rs:268:27
[INFO] [stdout]     |
[INFO] [stdout] 268 |     use super::{BitGraph, DfsIterator};
[INFO] [stdout]     |                           ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `r` is never read
[INFO] [stdout]    --> src/lib.rs:246:17
[INFO] [stdout]     |
[INFO] [stdout] 246 |             let mut r = None;
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:287:13
[INFO] [stdout]     |
[INFO] [stdout] 287 |         for i in 0..capacity {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[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/lib.rs:274:13
[INFO] [stdout]     |
[INFO] [stdout] 274 |         let mut c = BitGraph::with_capacity(capacity as u32);
[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/lib.rs:283:13
[INFO] [stdout]     |
[INFO] [stdout] 283 |         let mut c = BitGraph::complete(capacity as u32);
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 42.07s
[INFO] running `Command { std: "docker" "inspect" "722a35712d9c55349e5bbe4d211a38f3625504884e2dfcc72d28ea2923c84ed5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "722a35712d9c55349e5bbe4d211a38f3625504884e2dfcc72d28ea2923c84ed5", kill_on_drop: false }`
[INFO] [stdout] 722a35712d9c55349e5bbe4d211a38f3625504884e2dfcc72d28ea2923c84ed5