[INFO] fetching crate bxl 0.1.0...
[INFO] checking bxl-0.1.0 against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] extracting crate bxl 0.1.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate bxl 0.1.0 on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "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-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 96fd0e6388049651e6d96b1319024fe0fac538a46e51348c690d85edf844b6de
[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" "96fd0e6388049651e6d96b1319024fe0fac538a46e51348c690d85edf844b6de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "96fd0e6388049651e6d96b1319024fe0fac538a46e51348c690d85edf844b6de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96fd0e6388049651e6d96b1319024fe0fac538a46e51348c690d85edf844b6de", kill_on_drop: false }`
[INFO] [stdout] 96fd0e6388049651e6d96b1319024fe0fac538a46e51348c690d85edf844b6de
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] af3e5e0df9b1872adaf34b2705f8d460ff78f8867b9b251cfe3f3b32338ed798
[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" "af3e5e0df9b1872adaf34b2705f8d460ff78f8867b9b251cfe3f3b32338ed798", 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 1.22s
[INFO] running `Command { std: "docker" "inspect" "af3e5e0df9b1872adaf34b2705f8d460ff78f8867b9b251cfe3f3b32338ed798", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af3e5e0df9b1872adaf34b2705f8d460ff78f8867b9b251cfe3f3b32338ed798", kill_on_drop: false }`
[INFO] [stdout] af3e5e0df9b1872adaf34b2705f8d460ff78f8867b9b251cfe3f3b32338ed798