[INFO] fetching crate bxl 0.1.0...
[INFO] checking bxl-0.1.0 against master#893fadd11a52aa26fc19c67ee1b79f03d6a1bed3 for pr-77153
[INFO] extracting crate bxl 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate bxl 0.1.0 on toolchain 893fadd11a52aa26fc19c67ee1b79f03d6a1bed3
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+893fadd11a52aa26fc19c67ee1b79f03d6a1bed3" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bxl 0.1.0
[INFO] finished tweaking crates.io crate bxl 0.1.0
[INFO] tweaked toml for crates.io crate bxl 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+893fadd11a52aa26fc19c67ee1b79f03d6a1bed3" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+893fadd11a52aa26fc19c67ee1b79f03d6a1bed3" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "+893fadd11a52aa26fc19c67ee1b79f03d6a1bed3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bad18d9dcd62a11e9902787cf381a7bde47fddf7b681203084679cf7d32613a1
[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" "bad18d9dcd62a11e9902787cf381a7bde47fddf7b681203084679cf7d32613a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bad18d9dcd62a11e9902787cf381a7bde47fddf7b681203084679cf7d32613a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bad18d9dcd62a11e9902787cf381a7bde47fddf7b681203084679cf7d32613a1", kill_on_drop: false }`
[INFO] [stdout] bad18d9dcd62a11e9902787cf381a7bde47fddf7b681203084679cf7d32613a1
[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" "+893fadd11a52aa26fc19c67ee1b79f03d6a1bed3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c6ed1a5b6389283910ffe34241329d84e446803d8924d5eb42f2a354f40dc5ca
[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" "c6ed1a5b6389283910ffe34241329d84e446803d8924d5eb42f2a354f40dc5ca", kill_on_drop: false }`
[INFO] [stderr]     Checking bit_reverse v0.1.8
[INFO] [stderr]     Checking bxl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/lib.rs:356:13
[INFO] [stdout]     |
[INFO] [stdout] 356 |         Err(err) => {
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `total_checks` is assigned to, but never used
[INFO] [stdout]    --> src/lib.rs:677:9
[INFO] [stdout]     |
[INFO] [stdout] 677 |     let mut total_checks = 0;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_total_checks` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_node`
[INFO] [stdout]   --> src/lib.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn print_node(tree: &NodeTree, node: &Node) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_dot`
[INFO] [stdout]   --> src/lib.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn print_dot(tree: &NodeTree) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `try_from`
[INFO] [stdout]    --> src/lib.rs:136:8
[INFO] [stdout]     |
[INFO] [stdout] 136 |     fn try_from(s: &str) -> Result<BitAddr, String> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_last_bit`
[INFO] [stdout]    --> src/lib.rs:174:8
[INFO] [stdout]     |
[INFO] [stdout] 174 |     fn get_last_bit(&self) -> Result<u8, &str> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_parent_of`
[INFO] [stdout]    --> src/lib.rs:220:8
[INFO] [stdout]     |
[INFO] [stdout] 220 |     fn is_parent_of(&self, other: BitAddr) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_left_child`
[INFO] [stdout]    --> src/lib.rs:248:8
[INFO] [stdout]     |
[INFO] [stdout] 248 |     fn is_left_child(&self) -> Result<bool, String> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/lib.rs:356:13
[INFO] [stdout]     |
[INFO] [stdout] 356 |         Err(err) => {
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `total_checks` is assigned to, but never used
[INFO] [stdout]    --> src/lib.rs:677:9
[INFO] [stdout]     |
[INFO] [stdout] 677 |     let mut total_checks = 0;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_total_checks` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_node`
[INFO] [stdout]   --> src/lib.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn print_node(tree: &NodeTree, node: &Node) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_dot`
[INFO] [stdout]   --> src/lib.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn print_dot(tree: &NodeTree) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.43s
[INFO] running `Command { std: "docker" "inspect" "c6ed1a5b6389283910ffe34241329d84e446803d8924d5eb42f2a354f40dc5ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6ed1a5b6389283910ffe34241329d84e446803d8924d5eb42f2a354f40dc5ca", kill_on_drop: false }`
[INFO] [stdout] c6ed1a5b6389283910ffe34241329d84e446803d8924d5eb42f2a354f40dc5ca