[INFO] cloning repository https://github.com/mghildiy/os-experiments
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mghildiy/os-experiments" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmghildiy%2Fos-experiments", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmghildiy%2Fos-experiments'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a7a329f9fd33e0ccc341410cdbea2a45579588c9
[INFO] checking mghildiy/os-experiments against master#cced03bfd61a304243a34504618ecec86c17063f for pr-157082
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmghildiy%2Fos-experiments" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mghildiy/os-experiments
[INFO] finished tweaking git repo https://github.com/mghildiy/os-experiments
[INFO] tweaked toml for git repo https://github.com/mghildiy/os-experiments written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mghildiy/os-experiments on toolchain cced03bfd61a304243a34504618ecec86c17063f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cced03bfd61a304243a34504618ecec86c17063f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mghildiy/os-experiments 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" "+cced03bfd61a304243a34504618ecec86c17063f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rand_core v0.10.0-rc-2
[INFO] [stderr]   Downloaded chacha20 v0.10.0-rc.5
[INFO] [stderr]   Downloaded wit-bindgen v0.46.0
[INFO] [stderr]   Downloaded rand v0.10.0-rc.5
[INFO] [stderr]   Downloaded wasip2 v1.0.1+wasi-0.2.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3e793bdf10248eb2ddbd6b0faebed8155c11b4589982e2893733958d93e8d540" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 9d964c576322fcc4afe21329181e15059fa88d7243ea1ed827e4a63e465a8921
[INFO] running `Command { std: "docker" "start" "9d964c576322fcc4afe21329181e15059fa88d7243ea1ed827e4a63e465a8921", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "9d964c576322fcc4afe21329181e15059fa88d7243ea1ed827e4a63e465a8921" "/opt/rustwide/cargo-home/bin/cargo" "+cced03bfd61a304243a34504618ecec86c17063f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9d964c576322fcc4afe21329181e15059fa88d7243ea1ed827e4a63e465a8921", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "9d964c576322fcc4afe21329181e15059fa88d7243ea1ed827e4a63e465a8921" "/opt/rustwide/cargo-home/bin/cargo" "+cced03bfd61a304243a34504618ecec86c17063f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.178
[INFO] [stderr]    Compiling getrandom v0.3.4
[INFO] [stderr]     Checking cfg-if v1.0.4
[INFO] [stderr]     Checking cpufeatures v0.2.17
[INFO] [stderr]     Checking rand_core v0.10.0-rc-2
[INFO] [stderr]     Checking chacha20 v0.10.0-rc.5
[INFO] [stderr]     Checking rand v0.10.0-rc.5
[INFO] [stderr]     Checking db-components v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/layout/cache_analysis.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |     for i in 0..10000000 {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/layout/cache_analysis.rs:101:9
[INFO] [stdout]     |
[INFO] [stdout] 101 |     for index in 0..10 {
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/layout/cache_analysis.rs:113:9
[INFO] [stdout]     |
[INFO] [stdout] 113 |     for index in 0..10 {
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple fields are never read
[INFO] [stdout]   --> src/layout/cache_analysis.rs:5:5
[INFO] [stdout]    |
[INFO] [stdout]  4 | struct Record {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout]  5 |     id: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout]  6 |     val1: i32,
[INFO] [stdout]  7 |     val2: i16,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]  8 |     dummy1: i16,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]  9 |     dummy2: i16,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 10 |     dummy3: i32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 11 |     dummy4: i32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 12 |     dummy5: i32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 13 |     dummy6: i32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 14 |     dummy7: i32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 15 |     dummy8: i64,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 16 |     dummy9: i64,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 17 |     dummy10: i64,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `scan_row_data` is never used
[INFO] [stdout]   --> src/layout/cache_analysis.rs:57:4
[INFO] [stdout]    |
[INFO] [stdout] 57 | fn scan_row_data(records: Vec<Record>, look_for: i32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `scan_col_data` is never used
[INFO] [stdout]   --> src/layout/cache_analysis.rs:78:4
[INFO] [stdout]    |
[INFO] [stdout] 78 | fn scan_col_data(vals: Vec<i32>, look_for: i32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PAGE_SIZE` is never used
[INFO] [stdout]  --> src/layout/page_analysis.rs:2:7
[INFO] [stdout]   |
[INFO] [stdout] 2 | const PAGE_SIZE: usize = 4096;
[INFO] [stdout]   |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PageHeader` is never constructed
[INFO] [stdout]  --> src/layout/page_analysis.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct PageHeader {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Page` is never constructed
[INFO] [stdout]  --> src/layout/page_analysis.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Page {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Slot` is never constructed
[INFO] [stdout]   --> src/layout/page_analysis.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Slot {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `insert` are never used
[INFO] [stdout]   --> src/layout/page_analysis.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl Page {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 19 |     fn new() -> Page {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     fn insert(&mut self, data: &[u8]) -> Option<usize> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/layout/cache_analysis.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |     for i in 0..10000000 {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/layout/cache_analysis.rs:101:9
[INFO] [stdout]     |
[INFO] [stdout] 101 |     for index in 0..10 {
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/layout/cache_analysis.rs:113:9
[INFO] [stdout]     |
[INFO] [stdout] 113 |     for index in 0..10 {
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple fields are never read
[INFO] [stdout]   --> src/layout/cache_analysis.rs:5:5
[INFO] [stdout]    |
[INFO] [stdout]  4 | struct Record {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout]  5 |     id: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout]  6 |     val1: i32,
[INFO] [stdout]  7 |     val2: i16,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]  8 |     dummy1: i16,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]  9 |     dummy2: i16,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 10 |     dummy3: i32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 11 |     dummy4: i32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 12 |     dummy5: i32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 13 |     dummy6: i32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 14 |     dummy7: i32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 15 |     dummy8: i64,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 16 |     dummy9: i64,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 17 |     dummy10: i64,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `scan_row_data` is never used
[INFO] [stdout]   --> src/layout/cache_analysis.rs:57:4
[INFO] [stdout]    |
[INFO] [stdout] 57 | fn scan_row_data(records: Vec<Record>, look_for: i32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `scan_col_data` is never used
[INFO] [stdout]   --> src/layout/cache_analysis.rs:78:4
[INFO] [stdout]    |
[INFO] [stdout] 78 | fn scan_col_data(vals: Vec<i32>, look_for: i32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PAGE_SIZE` is never used
[INFO] [stdout]  --> src/layout/page_analysis.rs:2:7
[INFO] [stdout]   |
[INFO] [stdout] 2 | const PAGE_SIZE: usize = 4096;
[INFO] [stdout]   |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PageHeader` is never constructed
[INFO] [stdout]  --> src/layout/page_analysis.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct PageHeader {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Page` is never constructed
[INFO] [stdout]  --> src/layout/page_analysis.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Page {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Slot` is never constructed
[INFO] [stdout]   --> src/layout/page_analysis.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Slot {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `insert` are never used
[INFO] [stdout]   --> src/layout/page_analysis.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl Page {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 19 |     fn new() -> Page {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     fn insert(&mut self, data: &[u8]) -> Option<usize> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.17s
[INFO] running `Command { std: "docker" "inspect" "9d964c576322fcc4afe21329181e15059fa88d7243ea1ed827e4a63e465a8921", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d964c576322fcc4afe21329181e15059fa88d7243ea1ed827e4a63e465a8921", kill_on_drop: false }`
[INFO] [stdout] 9d964c576322fcc4afe21329181e15059fa88d7243ea1ed827e4a63e465a8921