[INFO] cloning repository https://github.com/jthornber/thinp-garbage-collected
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jthornber/thinp-garbage-collected" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjthornber%2Fthinp-garbage-collected", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjthornber%2Fthinp-garbage-collected'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e8e57df1b085968e260eb18f0eb9a4fec34e1840
[INFO] testing jthornber/thinp-garbage-collected against 1.75.0 for beta-1.76-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjthornber%2Fthinp-garbage-collected" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jthornber/thinp-garbage-collected on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jthornber/thinp-garbage-collected
[INFO] finished tweaking git repo https://github.com/jthornber/thinp-garbage-collected
[INFO] tweaked toml for git repo https://github.com/jthornber/thinp-garbage-collected written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/jthornber/thinp-garbage-collected 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/jthornber/thin-provisioning-tools.git`
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "inspect" "29026d6f554b5836d97e391d5ca5c57a2db35a9cf2cc964c07b76ba836aa121e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29026d6f554b5836d97e391d5ca5c57a2db35a9cf2cc964c07b76ba836aa121e", kill_on_drop: false }`
[INFO] [stdout] 29026d6f554b5836d97e391d5ca5c57a2db35a9cf2cc964c07b76ba836aa121e
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[INFO] [stdout] d4b6b930d14ab47f00994f771519f66369ca2775cede4e960fd05e3f9bb9cdbe
[INFO] running `Command { std: "docker" "start" "-a" "d4b6b930d14ab47f00994f771519f66369ca2775cede4e960fd05e3f9bb9cdbe", kill_on_drop: false }`
[INFO] [stderr]    Compiling portable-atomic v1.4.3
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling thiserror v1.0.49
[INFO] [stderr]    Compiling getrandom v0.2.10
[INFO] [stderr]    Compiling anstyle v1.0.4
[INFO] [stderr]    Compiling clap_lex v0.5.1
[INFO] [stderr]    Compiling syn v2.0.38
[INFO] [stderr]    Compiling crc32c v0.6.4
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling clap_builder v4.4.6
[INFO] [stderr]    Compiling console v0.15.7
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling number_prefix v0.4.0
[INFO] [stderr]    Compiling roaring v0.10.2
[INFO] [stderr]    Compiling threadpool v1.8.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling flate2 v1.0.28
[INFO] [stderr]    Compiling indicatif v0.17.7
[INFO] [stderr]    Compiling quick-xml v0.29.0
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling data-encoding v2.4.0
[INFO] [stderr]    Compiling fixedbitset v0.4.2
[INFO] [stderr]    Compiling exitcode v1.1.2
[INFO] [stderr]    Compiling base64 v0.21.4
[INFO] [stderr]    Compiling rangemap v1.4.0
[INFO] [stderr]    Compiling linked-hash-map v0.5.6
[INFO] [stderr]    Compiling clap v4.4.6
[INFO] [stderr]    Compiling thiserror-impl v1.0.49
[INFO] [stderr]    Compiling num-derive v0.4.1
[INFO] [stderr]    Compiling thinp v1.0.6 (https://github.com/jthornber/thin-provisioning-tools.git?branch=main#e5a1a7a1)
[INFO] [stderr]    Compiling thinp-garbage-collected v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `holders`, `nr_free_blocks`, `cut`, `left`, and `right` are never read
[INFO] [stdout]   --> src/extent_allocator.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | struct Internal {
[INFO] [stdout]    |        -------- fields in this struct
[INFO] [stdout] 10 |     holders: usize,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 11 |     nr_free_blocks: u64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 12 |     cut: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 13 |     left: u8,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 14 |     right: u8,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Internal` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `begin`, `end`, and `cursor` are never read
[INFO] [stdout]   --> src/extent_allocator.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct Extent {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 19 |     begin: u64,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 20 |     end: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 21 |     cursor: u64,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Extent` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `extent` and `holders` are never read
[INFO] [stdout]   --> src/extent_allocator.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct Leaf {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 26 |     extent: Arc<Mutex<Extent>>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 27 |     holders: usize,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Leaf` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Leaf` is never constructed
[INFO] [stdout]   --> src/extent_allocator.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | enum Node {
[INFO] [stdout]    |      ---- variant in this enum
[INFO] [stdout] 32 |     Internal(Internal),
[INFO] [stdout] 33 |     Leaf(Leaf),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Tree` is never constructed
[INFO] [stdout]   --> src/extent_allocator.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct Tree {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dump_tree` is never used
[INFO] [stdout]   --> src/extent_allocator.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn dump_tree(tree: &Tree) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `char_run` is never used
[INFO] [stdout]   --> src/extent_allocator.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn char_run(c: char, fraction: f64, width: usize) -> String {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `draw_tree` is never used
[INFO] [stdout]   --> src/extent_allocator.rs:84:4
[INFO] [stdout]    |
[INFO] [stdout] 84 | fn draw_tree(tree: &Tree) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `nr_holders` and `nr_free_blocks` are never used
[INFO] [stdout]    --> src/extent_allocator.rs:147:8
[INFO] [stdout]     |
[INFO] [stdout] 146 | impl Node {
[INFO] [stdout]     | --------- methods in this implementation
[INFO] [stdout] 147 |     fn nr_holders(&self) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 154 |     fn nr_free_blocks(&self) -> u64 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/extent_allocator.rs:178:8
[INFO] [stdout]     |
[INFO] [stdout] 177 | impl Tree {
[INFO] [stdout]     | --------- associated items in this implementation
[INFO] [stdout] 178 |     fn new(nr_blocks: u64, nr_nodes: u8) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 201 |     fn alloc_node(&mut self) -> Option<u8> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 205 |     fn free_node(&mut self, node: u8) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 209 |     fn read_node(&self, node: u8) -> Node {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 213 |     fn write_node(&mut self, node: u8, node_data: Node) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 217 |     fn split_leaf(&mut self, node_index: u8) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 280 |     fn select_child(&self, left: u8, right: u8) -> u8 {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 302 |     fn borrow_(&mut self, node_index: u8) -> Option<Arc<Mutex<Extent>>> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 367 |     fn borrow(&mut self) -> Option<Arc<Mutex<Extent>>> {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 371 |     fn nr_free(&self, node_index: u8) -> u64 {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 381 |     fn release_(&mut self, block: u64, begin: u64, end: u64, node_index: u8) -> u8 {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 447 |     fn release(&mut self, extent: Arc<Mutex<Extent>>) {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 461 |     fn reset(&mut self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.30s
[INFO] running `Command { std: "docker" "inspect" "d4b6b930d14ab47f00994f771519f66369ca2775cede4e960fd05e3f9bb9cdbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4b6b930d14ab47f00994f771519f66369ca2775cede4e960fd05e3f9bb9cdbe", kill_on_drop: false }`
[INFO] [stdout] d4b6b930d14ab47f00994f771519f66369ca2775cede4e960fd05e3f9bb9cdbe
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 64f06ea2b5056ee7edce71d62b7a90e51e8accf78640074c24c2dbf6f26a5146
[INFO] running `Command { std: "docker" "start" "-a" "64f06ea2b5056ee7edce71d62b7a90e51e8accf78640074c24c2dbf6f26a5146", kill_on_drop: false }`
[INFO] [stdout] warning: fields `holders`, `nr_free_blocks`, `cut`, `left`, and `right` are never read
[INFO] [stdout]   --> src/extent_allocator.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | struct Internal {
[INFO] [stdout]    |        -------- fields in this struct
[INFO] [stdout] 10 |     holders: usize,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 11 |     nr_free_blocks: u64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 12 |     cut: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 13 |     left: u8,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 14 |     right: u8,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Internal` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `begin`, `end`, and `cursor` are never read
[INFO] [stdout]   --> src/extent_allocator.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct Extent {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 19 |     begin: u64,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 20 |     end: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 21 |     cursor: u64,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Extent` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `extent` and `holders` are never read
[INFO] [stdout]   --> src/extent_allocator.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct Leaf {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 26 |     extent: Arc<Mutex<Extent>>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 27 |     holders: usize,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Leaf` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Leaf` is never constructed
[INFO] [stdout]   --> src/extent_allocator.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | enum Node {
[INFO] [stdout]    |      ---- variant in this enum
[INFO] [stdout] 32 |     Internal(Internal),
[INFO] [stdout] 33 |     Leaf(Leaf),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Tree` is never constructed
[INFO] [stdout]   --> src/extent_allocator.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct Tree {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dump_tree` is never used
[INFO] [stdout]   --> src/extent_allocator.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn dump_tree(tree: &Tree) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `char_run` is never used
[INFO] [stdout]   --> src/extent_allocator.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn char_run(c: char, fraction: f64, width: usize) -> String {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `draw_tree` is never used
[INFO] [stdout]   --> src/extent_allocator.rs:84:4
[INFO] [stdout]    |
[INFO] [stdout] 84 | fn draw_tree(tree: &Tree) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `nr_holders` and `nr_free_blocks` are never used
[INFO] [stdout]    --> src/extent_allocator.rs:147:8
[INFO] [stdout]     |
[INFO] [stdout] 146 | impl Node {
[INFO] [stdout]     | --------- methods in this implementation
[INFO] [stdout] 147 |     fn nr_holders(&self) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 154 |     fn nr_free_blocks(&self) -> u64 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling thinp-garbage-collected v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/extent_allocator.rs:178:8
[INFO] [stdout]     |
[INFO] [stdout] 177 | impl Tree {
[INFO] [stdout]     | --------- associated items in this implementation
[INFO] [stdout] 178 |     fn new(nr_blocks: u64, nr_nodes: u8) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 201 |     fn alloc_node(&mut self) -> Option<u8> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 205 |     fn free_node(&mut self, node: u8) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 209 |     fn read_node(&self, node: u8) -> Node {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 213 |     fn write_node(&mut self, node: u8, node_data: Node) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 217 |     fn split_leaf(&mut self, node_index: u8) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 280 |     fn select_child(&self, left: u8, right: u8) -> u8 {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 302 |     fn borrow_(&mut self, node_index: u8) -> Option<Arc<Mutex<Extent>>> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 367 |     fn borrow(&mut self) -> Option<Arc<Mutex<Extent>>> {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 371 |     fn nr_free(&self, node_index: u8) -> u64 {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 381 |     fn release_(&mut self, block: u64, begin: u64, end: u64, node_index: u8) -> u8 {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 447 |     fn release(&mut self, extent: Arc<Mutex<Extent>>) {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 461 |     fn reset(&mut self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `holders`, `nr_free_blocks`, `cut`, `left`, and `right` are never read
[INFO] [stdout]   --> src/extent_allocator.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | struct Internal {
[INFO] [stdout]    |        -------- fields in this struct
[INFO] [stdout] 10 |     holders: usize,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 11 |     nr_free_blocks: u64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 12 |     cut: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 13 |     left: u8,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 14 |     right: u8,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Internal` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `begin`, `end`, and `cursor` are never read
[INFO] [stdout]   --> src/extent_allocator.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct Extent {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 19 |     begin: u64,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 20 |     end: u64,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 21 |     cursor: u64,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Extent` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `extent` and `holders` are never read
[INFO] [stdout]   --> src/extent_allocator.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct Leaf {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 26 |     extent: Arc<Mutex<Extent>>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 27 |     holders: usize,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Leaf` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Leaf` is never constructed
[INFO] [stdout]   --> src/extent_allocator.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | enum Node {
[INFO] [stdout]    |      ---- variant in this enum
[INFO] [stdout] 32 |     Internal(Internal),
[INFO] [stdout] 33 |     Leaf(Leaf),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Tree` is never constructed
[INFO] [stdout]   --> src/extent_allocator.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct Tree {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dump_tree` is never used
[INFO] [stdout]   --> src/extent_allocator.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn dump_tree(tree: &Tree) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `char_run` is never used
[INFO] [stdout]   --> src/extent_allocator.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn char_run(c: char, fraction: f64, width: usize) -> String {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `draw_tree` is never used
[INFO] [stdout]   --> src/extent_allocator.rs:84:4
[INFO] [stdout]    |
[INFO] [stdout] 84 | fn draw_tree(tree: &Tree) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `nr_holders` and `nr_free_blocks` are never used
[INFO] [stdout]    --> src/extent_allocator.rs:147:8
[INFO] [stdout]     |
[INFO] [stdout] 146 | impl Node {
[INFO] [stdout]     | --------- methods in this implementation
[INFO] [stdout] 147 |     fn nr_holders(&self) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 154 |     fn nr_free_blocks(&self) -> u64 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/extent_allocator.rs:178:8
[INFO] [stdout]     |
[INFO] [stdout] 177 | impl Tree {
[INFO] [stdout]     | --------- associated items in this implementation
[INFO] [stdout] 178 |     fn new(nr_blocks: u64, nr_nodes: u8) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 201 |     fn alloc_node(&mut self) -> Option<u8> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 205 |     fn free_node(&mut self, node: u8) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 209 |     fn read_node(&self, node: u8) -> Node {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 213 |     fn write_node(&mut self, node: u8, node_data: Node) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 217 |     fn split_leaf(&mut self, node_index: u8) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 280 |     fn select_child(&self, left: u8, right: u8) -> u8 {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 302 |     fn borrow_(&mut self, node_index: u8) -> Option<Arc<Mutex<Extent>>> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 367 |     fn borrow(&mut self) -> Option<Arc<Mutex<Extent>>> {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 371 |     fn nr_free(&self, node_index: u8) -> u64 {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 381 |     fn release_(&mut self, block: u64, begin: u64, end: u64, node_index: u8) -> u8 {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 447 |     fn release(&mut self, extent: Arc<Mutex<Extent>>) {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 461 |     fn reset(&mut self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.35s
[INFO] running `Command { std: "docker" "inspect" "64f06ea2b5056ee7edce71d62b7a90e51e8accf78640074c24c2dbf6f26a5146", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64f06ea2b5056ee7edce71d62b7a90e51e8accf78640074c24c2dbf6f26a5146", kill_on_drop: false }`
[INFO] [stdout] 64f06ea2b5056ee7edce71d62b7a90e51e8accf78640074c24c2dbf6f26a5146
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f3036d507e0bf38a1e34567cfae9fc1a11c1db3b0e53d4078b006841eb90b84a
[INFO] running `Command { std: "docker" "start" "-a" "f3036d507e0bf38a1e34567cfae9fc1a11c1db3b0e53d4078b006841eb90b84a", kill_on_drop: false }`
[INFO] [stderr] warning: fields `holders`, `nr_free_blocks`, `cut`, `left`, and `right` are never read
[INFO] [stderr]   --> src/extent_allocator.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 9  | struct Internal {
[INFO] [stderr]    |        -------- fields in this struct
[INFO] [stderr] 10 |     holders: usize,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 11 |     nr_free_blocks: u64,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 12 |     cut: u64,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 13 |     left: u8,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 14 |     right: u8,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Internal` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `begin`, `end`, and `cursor` are never read
[INFO] [stderr]   --> src/extent_allocator.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 18 | struct Extent {
[INFO] [stderr]    |        ------ fields in this struct
[INFO] [stderr] 19 |     begin: u64,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 20 |     end: u64,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 21 |     cursor: u64,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Extent` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `extent` and `holders` are never read
[INFO] [stderr]   --> src/extent_allocator.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 25 | struct Leaf {
[INFO] [stderr]    |        ---- fields in this struct
[INFO] [stderr] 26 |     extent: Arc<Mutex<Extent>>,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 27 |     holders: usize,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Leaf` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: variant `Leaf` is never constructed
[INFO] [stderr]   --> src/extent_allocator.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 31 | enum Node {
[INFO] [stderr]    |      ---- variant in this enum
[INFO] [stderr] 32 |     Internal(Internal),
[INFO] [stderr] 33 |     Leaf(Leaf),
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Node` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Tree` is never constructed
[INFO] [stderr]   --> src/extent_allocator.rs:36:8
[INFO] [stderr]    |
[INFO] [stderr] 36 | struct Tree {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `dump_tree` is never used
[INFO] [stderr]   --> src/extent_allocator.rs:43:4
[INFO] [stderr]    |
[INFO] [stderr] 43 | fn dump_tree(tree: &Tree) {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `char_run` is never used
[INFO] [stderr]   --> src/extent_allocator.rs:75:4
[INFO] [stderr]    |
[INFO] [stderr] 75 | fn char_run(c: char, fraction: f64, width: usize) -> String {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `draw_tree` is never used
[INFO] [stderr]   --> src/extent_allocator.rs:84:4
[INFO] [stderr]    |
[INFO] [stderr] 84 | fn draw_tree(tree: &Tree) {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `nr_holders` and `nr_free_blocks` are never used
[INFO] [stderr]    --> src/extent_allocator.rs:147:8
[INFO] [stderr]     |
[INFO] [stderr] 146 | impl Node {
[INFO] [stderr]     | --------- methods in this implementation
[INFO] [stderr] 147 |     fn nr_holders(&self) -> usize {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 154 |     fn nr_free_blocks(&self) -> u64 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: multiple associated items are never used
[INFO] [stderr]    --> src/extent_allocator.rs:178:8
[INFO] [stderr]     |
[INFO] [stderr] 177 | impl Tree {
[INFO] [stderr]     | --------- associated items in this implementation
[INFO] [stderr] 178 |     fn new(nr_blocks: u64, nr_nodes: u8) -> Self {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 201 |     fn alloc_node(&mut self) -> Option<u8> {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 205 |     fn free_node(&mut self, node: u8) {
[INFO] [stderr]     |        ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 209 |     fn read_node(&self, node: u8) -> Node {
[INFO] [stderr]     |        ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 213 |     fn write_node(&mut self, node: u8, node_data: Node) {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 217 |     fn split_leaf(&mut self, node_index: u8) -> bool {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 280 |     fn select_child(&self, left: u8, right: u8) -> u8 {
[INFO] [stderr]     |        ^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 302 |     fn borrow_(&mut self, node_index: u8) -> Option<Arc<Mutex<Extent>>> {
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 367 |     fn borrow(&mut self) -> Option<Arc<Mutex<Extent>>> {
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 371 |     fn nr_free(&self, node_index: u8) -> u64 {
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 381 |     fn release_(&mut self, block: u64, begin: u64, end: u64, node_index: u8) -> u8 {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 447 |     fn release(&mut self, extent: Arc<Mutex<Extent>>) {
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 461 |     fn reset(&mut self) {
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `thinp-garbage-collected` (lib) generated 10 warnings
[INFO] [stderr] warning: `thinp-garbage-collected` (lib test) generated 10 warnings (10 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/thinp_garbage_collected-f9b2680161b61afa)
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test block_cache::test::test_create ... ok
[INFO] [stdout] test block_cache::test::test_new_block ... ok
[INFO] [stdout] test btree::test::empty_btree ... ok
[INFO] [stdout] test btree::test::lookup_fails ... ok
[INFO] [stdout] test btree::test::insert_single ... ok
[INFO] [stdout] test btree::test::remove_single ... ok
[INFO] [stdout] test block_cache::test::test_rolling_writes ... ok
[INFO] [stdout] test block_cache::test::test_write_twice ... ok
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/deps/thinp_garbage_collected-f9b2680161b61afa` (signal: 11, SIGSEGV: invalid memory reference)
[INFO] running `Command { std: "docker" "inspect" "f3036d507e0bf38a1e34567cfae9fc1a11c1db3b0e53d4078b006841eb90b84a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3036d507e0bf38a1e34567cfae9fc1a11c1db3b0e53d4078b006841eb90b84a", kill_on_drop: false }`
[INFO] [stdout] f3036d507e0bf38a1e34567cfae9fc1a11c1db3b0e53d4078b006841eb90b84a
