[INFO] fetching crate crcp 0.3.5...
[INFO] checking crcp-0.3.5 against master#3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 for pr-65819
[INFO] extracting crate crcp 0.3.5 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate crcp 0.3.5 on toolchain 3aedcf06b73fc36feeebca3d579e1d2a6c40acc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate crcp 0.3.5
[INFO] finished tweaking crates.io crate crcp 0.3.5
[INFO] tweaked toml for crates.io crate crcp 0.3.5 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate crcp 0.3.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1a10286bc68119114bc5014187ba1d3d295c5dece607440216e66e498f985cb7
[INFO] running `Command { std: "docker" "start" "-a" "1a10286bc68119114bc5014187ba1d3d295c5dece607440216e66e498f985cb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1a10286bc68119114bc5014187ba1d3d295c5dece607440216e66e498f985cb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a10286bc68119114bc5014187ba1d3d295c5dece607440216e66e498f985cb7", kill_on_drop: false }`
[INFO] [stdout] 1a10286bc68119114bc5014187ba1d3d295c5dece607440216e66e498f985cb7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 08665321dd4ae1d47dfd4875664120bfe3430d030a535790864ca3fcda2ba327
[INFO] running `Command { std: "docker" "start" "-a" "08665321dd4ae1d47dfd4875664120bfe3430d030a535790864ca3fcda2ba327", kill_on_drop: false }`
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking crcp v0.3.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `used`
[INFO] [stdout]    --> src/main.rs:305:13
[INFO] [stdout]     |
[INFO] [stdout] 305 |     let mut used: HashSet<u32>;
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_used`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d2k`
[INFO] [stdout]    --> src/main.rs:203:17
[INFO] [stdout]     |
[INFO] [stdout] 203 |             let d2k = numcodel;
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_d2k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `dualdistance_distribution_calculated` is never read
[INFO] [stdout]    --> src/main.rs:293:17
[INFO] [stdout]     |
[INFO] [stdout] 293 |                 dualdistance_distribution_calculated = true;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:194:13
[INFO] [stdout]     |
[INFO] [stdout] 194 |         let mut res = 0u8;
[INFO] [stdout]     |             ----^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:478:13
[INFO] [stdout]     |
[INFO] [stdout] 478 |         let mut j = i.clone();
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `START_POL`
[INFO] [stdout]   --> src/main.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | const START_POL: u64 = 0x200001;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `END_POL`
[INFO] [stdout]   --> src/main.rs:20:1
[INFO] [stdout]    |
[INFO] [stdout] 20 | const END_POL: u64 = 0x3fffff;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `MIN_CODE_LENGTH`
[INFO] [stdout]   --> src/main.rs:22:1
[INFO] [stdout]    |
[INFO] [stdout] 22 | const MIN_CODE_LENGTH: i32 = 21; // equals to k+1 -- to do make it automatic
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `G` should have a snake case name
[INFO] [stdout]    --> src/main.rs:234:21
[INFO] [stdout]     |
[INFO] [stdout] 234 |                 let G = grid_base.as_mut_slice();
[INFO] [stdout]     |                     ^ help: convert the identifier to snake case: `g`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `used`
[INFO] [stdout]    --> src/main.rs:305:13
[INFO] [stdout]     |
[INFO] [stdout] 305 |     let mut used: HashSet<u32>;
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_used`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d2k`
[INFO] [stdout]    --> src/main.rs:203:17
[INFO] [stdout]     |
[INFO] [stdout] 203 |             let d2k = numcodel;
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_d2k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `dualdistance_distribution_calculated` is never read
[INFO] [stdout]    --> src/main.rs:293:17
[INFO] [stdout]     |
[INFO] [stdout] 293 |                 dualdistance_distribution_calculated = true;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:194:13
[INFO] [stdout]     |
[INFO] [stdout] 194 |         let mut res = 0u8;
[INFO] [stdout]     |             ----^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:365:13
[INFO] [stdout]     |
[INFO] [stdout] 365 |         let mut i: Vec<u32> = vec![0x10001];
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:375:13
[INFO] [stdout]     |
[INFO] [stdout] 375 |         let mut i: Vec<u32> = vec![0x10001, 0x1];
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:382:13
[INFO] [stdout]     |
[INFO] [stdout] 382 |         let mut i: Vec<u32> = vec![0x10001, 0x1];
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:392:13
[INFO] [stdout]     |
[INFO] [stdout] 392 |         let mut i: Vec<u32> = vec![0x10001, 0x1];
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:398:13
[INFO] [stdout]     |
[INFO] [stdout] 398 |         let mut i: Vec<u32> = vec![0x10001, 0x1];
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:411:13
[INFO] [stdout]     |
[INFO] [stdout] 411 |         let mut i: Vec<u32> = vec![
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:478:13
[INFO] [stdout]     |
[INFO] [stdout] 478 |         let mut j = i.clone();
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `START_POL`
[INFO] [stdout]   --> src/main.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | const START_POL: u64 = 0x200001;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `END_POL`
[INFO] [stdout]   --> src/main.rs:20:1
[INFO] [stdout]    |
[INFO] [stdout] 20 | const END_POL: u64 = 0x3fffff;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `MIN_CODE_LENGTH`
[INFO] [stdout]   --> src/main.rs:22:1
[INFO] [stdout]    |
[INFO] [stdout] 22 | const MIN_CODE_LENGTH: i32 = 21; // equals to k+1 -- to do make it automatic
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `G` should have a snake case name
[INFO] [stdout]    --> src/main.rs:234:21
[INFO] [stdout]     |
[INFO] [stdout] 234 |                 let G = grid_base.as_mut_slice();
[INFO] [stdout]     |                     ^ help: convert the identifier to snake case: `g`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.21s
[INFO] running `Command { std: "docker" "inspect" "08665321dd4ae1d47dfd4875664120bfe3430d030a535790864ca3fcda2ba327", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08665321dd4ae1d47dfd4875664120bfe3430d030a535790864ca3fcda2ba327", kill_on_drop: false }`
[INFO] [stdout] 08665321dd4ae1d47dfd4875664120bfe3430d030a535790864ca3fcda2ba327