[INFO] fetching crate arboretum-td 0.1.0...
[INFO] checking arboretum-td-0.1.0 against master#e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682 for beta-170-4
[INFO] extracting crate arboretum-td 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate arboretum-td 0.1.0 on toolchain e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate arboretum-td 0.1.0
[INFO] finished tweaking crates.io crate arboretum-td 0.1.0
[INFO] tweaked toml for crates.io crate arboretum-td 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate crates.io crate arboretum-td 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" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 09b454b23940f50da74a72d4fd80afa8ce3ca1c6258fc9b51392ae7933b9bc2c
[INFO] running `Command { std: "docker" "start" "-a" "09b454b23940f50da74a72d4fd80afa8ce3ca1c6258fc9b51392ae7933b9bc2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "09b454b23940f50da74a72d4fd80afa8ce3ca1c6258fc9b51392ae7933b9bc2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09b454b23940f50da74a72d4fd80afa8ce3ca1c6258fc9b51392ae7933b9bc2c", kill_on_drop: false }`
[INFO] [stdout] 09b454b23940f50da74a72d4fd80afa8ce3ca1c6258fc9b51392ae7933b9bc2c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bde5db1990b8a4749e921ce3a9dd29e5bba9509bdc681f9ccd147df753696337
[INFO] running `Command { std: "docker" "start" "-a" "bde5db1990b8a4749e921ce3a9dd29e5bba9509bdc681f9ccd147df753696337", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling num-bigint v0.4.0
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling radium v0.5.3
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]     Checking byteorder v1.4.2
[INFO] [stderr]     Checking wyz v0.2.0
[INFO] [stderr]     Checking funty v1.1.0
[INFO] [stderr]     Checking tap v1.0.0
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]     Checking bitvec v0.19.5
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking num-integer v0.1.44
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking arboretum-td v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `epoch`
[INFO] [stdout]    --> src/meta_heuristics/tabu_local_search.rs:169:13
[INFO] [stdout]     |
[INFO] [stdout] 169 |         for epoch in 0..self.epochs {
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_epoch`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `epoch`
[INFO] [stdout]    --> src/meta_heuristics/tabu_local_search.rs:169:13
[INFO] [stdout]     |
[INFO] [stdout] 169 |         for epoch in 0..self.epochs {
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_epoch`
[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/tree_decomposition.rs:249:13
[INFO] [stdout]     |
[INFO] [stdout] 249 |         for mut b in other.bags.iter_mut() {
[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/tree_decomposition.rs:249:13
[INFO] [stdout]     |
[INFO] [stdout] 249 |         for mut b in other.bags.iter_mut() {
[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: using `.borrow()` on a double reference, which returns `&BitGraph` instead of borrowing the inner type
[INFO] [stdout]    --> src/exact/tamakipid.rs:167:31
[INFO] [stdout]     |
[INFO] [stdout] 167 |                     self.graph.borrow(),
[INFO] [stdout]     |                               ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.borrow()` on a double reference, which returns `&BitGraph` instead of borrowing the inner type
[INFO] [stdout]    --> src/exact/tamakipid.rs:170:76
[INFO] [stdout]     |
[INFO] [stdout] 170 |                 let pmc = Pmc::new(closed_neighborhood, &blocks, self.graph.borrow());
[INFO] [stdout]     |                                                                            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.borrow()` on a double reference, which returns `Block` instead of borrowing the inner type
[INFO] [stdout]    --> src/exact/tamakipid.rs:513:66
[INFO] [stdout]     |
[INFO] [stdout] 513 |                         .is_subset_of(&outbound.as_ref().unwrap().borrow().separator)
[INFO] [stdout]     |                                                                  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.borrow()` on a double reference, which returns `&BitSet` instead of borrowing the inner type
[INFO] [stdout]    --> src/exact/tamakipid.rs:775:49
[INFO] [stdout]     |
[INFO] [stdout] 775 |         new_separator.or(i_block.block.separator.borrow());
[INFO] [stdout]     |                                                 ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.borrow()` on a double reference, which returns `&BitSet` instead of borrowing the inner type
[INFO] [stdout]   --> src/graph/bit_graph.rs:41:22
[INFO] [stdout]    |
[INFO] [stdout] 41 |         self.graph[u].borrow()
[INFO] [stdout]    |                      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.borrow()` on a double reference, which returns `&HashMapGraph` instead of borrowing the inner type
[INFO] [stdout]    --> src/safe_separator_framework.rs:408:23
[INFO] [stdout]     |
[INFO] [stdout] 408 |             self.graph.borrow(),
[INFO] [stdout]     |                       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.borrow()` on a double reference, which returns `&BitGraph` instead of borrowing the inner type
[INFO] [stdout]    --> src/exact/tamakipid.rs:167:31
[INFO] [stdout]     |
[INFO] [stdout] 167 |                     self.graph.borrow(),
[INFO] [stdout]     |                               ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.borrow()` on a double reference, which returns `&BitGraph` instead of borrowing the inner type
[INFO] [stdout]    --> src/exact/tamakipid.rs:170:76
[INFO] [stdout]     |
[INFO] [stdout] 170 |                 let pmc = Pmc::new(closed_neighborhood, &blocks, self.graph.borrow());
[INFO] [stdout]     |                                                                            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.borrow()` on a double reference, which returns `Block` instead of borrowing the inner type
[INFO] [stdout]    --> src/exact/tamakipid.rs:513:66
[INFO] [stdout]     |
[INFO] [stdout] 513 |                         .is_subset_of(&outbound.as_ref().unwrap().borrow().separator)
[INFO] [stdout]     |                                                                  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.borrow()` on a double reference, which returns `&BitSet` instead of borrowing the inner type
[INFO] [stdout]    --> src/exact/tamakipid.rs:775:49
[INFO] [stdout]     |
[INFO] [stdout] 775 |         new_separator.or(i_block.block.separator.borrow());
[INFO] [stdout]     |                                                 ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.borrow()` on a double reference, which returns `&BitSet` instead of borrowing the inner type
[INFO] [stdout]   --> src/graph/bit_graph.rs:41:22
[INFO] [stdout]    |
[INFO] [stdout] 41 |         self.graph[u].borrow()
[INFO] [stdout]    |                      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.borrow()` on a double reference, which returns `&HashMapGraph` instead of borrowing the inner type
[INFO] [stdout]    --> src/safe_separator_framework.rs:408:23
[INFO] [stdout]     |
[INFO] [stdout] 408 |             self.graph.borrow(),
[INFO] [stdout]     |                       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.22s
[INFO] running `Command { std: "docker" "inspect" "bde5db1990b8a4749e921ce3a9dd29e5bba9509bdc681f9ccd147df753696337", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bde5db1990b8a4749e921ce3a9dd29e5bba9509bdc681f9ccd147df753696337", kill_on_drop: false }`
[INFO] [stdout] bde5db1990b8a4749e921ce3a9dd29e5bba9509bdc681f9ccd147df753696337
