[INFO] cloning repository https://github.com/RustyYato/double-buffer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/RustyYato/double-buffer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRustyYato%2Fdouble-buffer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRustyYato%2Fdouble-buffer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2cd9e756544cdb6c76d9bd08268201c807f123d7
[INFO] checking RustyYato/double-buffer against master#55e86c996809902e8bbad512cfb4d2c18be446d9 for pr-153027
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRustyYato%2Fdouble-buffer" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/RustyYato/double-buffer
[INFO] finished tweaking git repo https://github.com/RustyYato/double-buffer
[INFO] tweaked toml for git repo https://github.com/RustyYato/double-buffer written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/RustyYato/double-buffer on toolchain 55e86c996809902e8bbad512cfb4d2c18be446d9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+55e86c996809902e8bbad512cfb4d2c18be446d9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/RustyYato/double-buffer already has a lockfile, it will not be regenerated
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[INFO] running `Command { std: "docker" "start" "-a" "66de49eb512d721cdd2170f857478639d7871246e2ff079d82a1a34aa505454e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "66de49eb512d721cdd2170f857478639d7871246e2ff079d82a1a34aa505454e", kill_on_drop: false }`
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[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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+55e86c996809902e8bbad512cfb4d2c18be446d9" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stdout] warning: unused imports: `convert::Infallible` and `fs::read_to_string`
[INFO] [stdout]  --> chmap-perf/src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     convert::Infallible,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 4 |     fs::read_to_string,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `color_eyre::owo_colors::colors::xterm::ConiferGreen`
[INFO] [stdout]   --> chmap-perf/src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use color_eyre::owo_colors::colors::xterm::ConiferGreen;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Strategy`
[INFO] [stdout]   --> chmap-perf/src/main.rs:12:41
[INFO] [stdout]    |
[INFO] [stdout] 12 | use dbuf::interface::{BlockingStrategy, Strategy};
[INFO] [stdout]    |                                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `convert::Infallible` and `fs::read_to_string`
[INFO] [stdout]  --> chmap-perf/src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     convert::Infallible,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 4 |     fs::read_to_string,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `color_eyre::owo_colors::colors::xterm::ConiferGreen`
[INFO] [stdout]   --> chmap-perf/src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use color_eyre::owo_colors::colors::xterm::ConiferGreen;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Strategy`
[INFO] [stdout]   --> chmap-perf/src/main.rs:12:41
[INFO] [stdout]    |
[INFO] [stdout] 12 | use dbuf::interface::{BlockingStrategy, Strategy};
[INFO] [stdout]    |                                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `IndexedRandom`
[INFO] [stdout]   --> chmap-perf/src/main.rs:13:17
[INFO] [stdout]    |
[INFO] [stdout] 13 | use rand::seq::{IndexedRandom, IteratorRandom};
[INFO] [stdout]    |                 ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `IndexedRandom`
[INFO] [stdout]   --> chmap-perf/src/main.rs:13:17
[INFO] [stdout]    |
[INFO] [stdout] 13 | use rand::seq::{IndexedRandom, IteratorRandom};
[INFO] [stdout]    |                 ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `valid_range`
[INFO] [stdout]    --> chmap-perf/src/main.rs:145:17
[INFO] [stdout]     |
[INFO] [stdout] 145 |             let valid_range = start..start + thread_range_len / 2;
[INFO] [stdout]     |                 ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_valid_range`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `valid_range`
[INFO] [stdout]    --> chmap-perf/src/main.rs:147:17
[INFO] [stdout]     |
[INFO] [stdout] 147 |             let valid_range = 0..u32::MAX / 2;
[INFO] [stdout]     |                 ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_valid_range`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `valid_range`
[INFO] [stdout]    --> chmap-perf/src/main.rs:145:17
[INFO] [stdout]     |
[INFO] [stdout] 145 |             let valid_range = start..start + thread_range_len / 2;
[INFO] [stdout]     |                 ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_valid_range`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `valid_range`
[INFO] [stdout]    --> chmap-perf/src/main.rs:147:17
[INFO] [stdout]     |
[INFO] [stdout] 147 |             let valid_range = 0..u32::MAX / 2;
[INFO] [stdout]     |                 ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_valid_range`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]    --> chmap-perf/src/main.rs:296:47
[INFO] [stdout]     |
[INFO] [stdout] 296 | ...                   expected_val: val,
[INFO] [stdout]     |                                     ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]    --> chmap-perf/src/main.rs:296:47
[INFO] [stdout]     |
[INFO] [stdout] 296 | ...                   expected_val: val,
[INFO] [stdout]     |                                     ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]    --> chmap-perf/src/main.rs:376:47
[INFO] [stdout]     |
[INFO] [stdout] 376 | ...                   expected_val: val,
[INFO] [stdout]     |                                     ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]    --> chmap-perf/src/main.rs:376:47
[INFO] [stdout]     |
[INFO] [stdout] 376 | ...                   expected_val: val,
[INFO] [stdout]     |                                     ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]    --> chmap-perf/src/main.rs:453:47
[INFO] [stdout]     |
[INFO] [stdout] 453 | ...                   expected_val: val,
[INFO] [stdout]     |                                     ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]    --> chmap-perf/src/main.rs:453:47
[INFO] [stdout]     |
[INFO] [stdout] 453 | ...                   expected_val: val,
[INFO] [stdout]     |                                     ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]    --> chmap-perf/src/main.rs:525:47
[INFO] [stdout]     |
[INFO] [stdout] 525 | ...                   expected_val: val,
[INFO] [stdout]     |                                     ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `expected_val` is never read
[INFO] [stdout]    --> chmap-perf/src/main.rs:232:24
[INFO] [stdout]     |
[INFO] [stdout] 232 |     Remove { key: u32, expected_val: u32 },
[INFO] [stdout]     |     ------             ^^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `MapOps` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]    --> chmap-perf/src/main.rs:525:47
[INFO] [stdout]     |
[INFO] [stdout] 525 | ...                   expected_val: val,
[INFO] [stdout]     |                                     ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `expected_val` is never read
[INFO] [stdout]    --> chmap-perf/src/main.rs:232:24
[INFO] [stdout]     |
[INFO] [stdout] 232 |     Remove { key: u32, expected_val: u32 },
[INFO] [stdout]     |     ------             ^^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `MapOps` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 21.26s
[INFO] running `Command { std: "docker" "inspect" "eb797c48d72f28af16d58788d5a552ea45748092f91ba9b6faecf647336936aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb797c48d72f28af16d58788d5a552ea45748092f91ba9b6faecf647336936aa", kill_on_drop: false }`
[INFO] [stdout] eb797c48d72f28af16d58788d5a552ea45748092f91ba9b6faecf647336936aa
