[INFO] cloning repository https://github.com/edave64/ku
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/edave64/ku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fedave64%2Fku", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fedave64%2Fku'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 127fcd69e0818de02999b08dd0c0b3e118f8aa9b
[INFO] building edave64/ku against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fedave64%2Fku" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/edave64/ku on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/edave64/ku
[INFO] finished tweaking git repo https://github.com/edave64/ku
[INFO] tweaked toml for git repo https://github.com/edave64/ku written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/edave64/ku 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b9f11cd39f3d5c951c7f2b0ba304f6c50c6c30baee05da2bff7608b24ee7daa8
[INFO] running `Command { std: "docker" "start" "-a" "b9f11cd39f3d5c951c7f2b0ba304f6c50c6c30baee05da2bff7608b24ee7daa8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b9f11cd39f3d5c951c7f2b0ba304f6c50c6c30baee05da2bff7608b24ee7daa8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9f11cd39f3d5c951c7f2b0ba304f6c50c6c30baee05da2bff7608b24ee7daa8", kill_on_drop: false }`
[INFO] [stdout] b9f11cd39f3d5c951c7f2b0ba304f6c50c6c30baee05da2bff7608b24ee7daa8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 44f18f09cc70d787b5a1b6fada8167f3877ac181ba4469a61350388ea7fdb8b2
[INFO] running `Command { std: "docker" "start" "-a" "44f18f09cc70d787b5a1b6fada8167f3877ac181ba4469a61350388ea7fdb8b2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.104
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling ku v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]   --> src/codex/simple.rs:72:27
[INFO] [stdout]    |
[INFO] [stdout] 72 |                 [x, y] => (x << 4 | y),
[INFO] [stdout]    |                           ^          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 72 -                 [x, y] => (x << 4 | y),
[INFO] [stdout] 72 +                 [x, y] => x << 4 | y,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]   --> src/codex/simple.rs:73:24
[INFO] [stdout]    |
[INFO] [stdout] 73 |                 [x] => (x << 4),
[INFO] [stdout]    |                        ^      ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 73 -                 [x] => (x << 4),
[INFO] [stdout] 73 +                 [x] => x << 4,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `to_nums` and `first_unsolved` are never used
[INFO] [stdout]    --> src/solver/board.rs:65:12
[INFO] [stdout]     |
[INFO] [stdout] 25  | impl Board {
[INFO] [stdout]     | ---------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 65  |     pub fn to_nums(&self) -> Vec<u8> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 107 |     pub fn first_unsolved(&self) -> Option<Cell> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BitWriter` is never constructed
[INFO] [stdout]  --> src/tools.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct BitWriter {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `write`, `write_u16`, `disolve`, and `disolve_drop_zeros` are never used
[INFO] [stdout]   --> src/tools.rs:8:12
[INFO] [stdout]    |
[INFO] [stdout] 7  | impl BitWriter {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 8  |     pub fn new() -> BitWriter {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub fn write(&mut self, value: u8, length: u8) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 26 |     pub fn write_u16(&mut self, value: u16, length: u8) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn disolve(mut self) -> Vec<u8> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |     pub fn disolve_drop_zeros(mut self) -> Vec<u8> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BitReader` is never constructed
[INFO] [stdout]   --> src/tools.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub struct BitReader {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `read` are never used
[INFO] [stdout]   --> src/tools.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 64 | impl BitReader {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 65 |     pub fn new(mut vec: Vec<u8>) -> BitReader {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 75 |     pub fn read(&mut self, length: u8) -> u8 {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.73s
[INFO] running `Command { std: "docker" "inspect" "44f18f09cc70d787b5a1b6fada8167f3877ac181ba4469a61350388ea7fdb8b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44f18f09cc70d787b5a1b6fada8167f3877ac181ba4469a61350388ea7fdb8b2", kill_on_drop: false }`
[INFO] [stdout] 44f18f09cc70d787b5a1b6fada8167f3877ac181ba4469a61350388ea7fdb8b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cb50bba15b683e51161496130bcb1681f35fad190f6ed577ca32a44cf53c810c
[INFO] running `Command { std: "docker" "start" "-a" "cb50bba15b683e51161496130bcb1681f35fad190f6ed577ca32a44cf53c810c", kill_on_drop: false }`
[INFO] [stderr]    Compiling ku v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]   --> src/codex/simple.rs:72:27
[INFO] [stdout]    |
[INFO] [stdout] 72 |                 [x, y] => (x << 4 | y),
[INFO] [stdout]    |                           ^          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 72 -                 [x, y] => (x << 4 | y),
[INFO] [stdout] 72 +                 [x, y] => x << 4 | y,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]   --> src/codex/simple.rs:73:24
[INFO] [stdout]    |
[INFO] [stdout] 73 |                 [x] => (x << 4),
[INFO] [stdout]    |                        ^      ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 73 -                 [x] => (x << 4),
[INFO] [stdout] 73 +                 [x] => x << 4,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `to_nums` and `first_unsolved` are never used
[INFO] [stdout]    --> src/solver/board.rs:65:12
[INFO] [stdout]     |
[INFO] [stdout] 25  | impl Board {
[INFO] [stdout]     | ---------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 65  |     pub fn to_nums(&self) -> Vec<u8> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 107 |     pub fn first_unsolved(&self) -> Option<Cell> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BitWriter` is never constructed
[INFO] [stdout]  --> src/tools.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct BitWriter {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `write`, `write_u16`, `disolve`, and `disolve_drop_zeros` are never used
[INFO] [stdout]   --> src/tools.rs:8:12
[INFO] [stdout]    |
[INFO] [stdout] 7  | impl BitWriter {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 8  |     pub fn new() -> BitWriter {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub fn write(&mut self, value: u8, length: u8) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 26 |     pub fn write_u16(&mut self, value: u16, length: u8) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn disolve(mut self) -> Vec<u8> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |     pub fn disolve_drop_zeros(mut self) -> Vec<u8> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BitReader` is never constructed
[INFO] [stdout]   --> src/tools.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub struct BitReader {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `read` are never used
[INFO] [stdout]   --> src/tools.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 64 | impl BitReader {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 65 |     pub fn new(mut vec: Vec<u8>) -> BitReader {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 75 |     pub fn read(&mut self, length: u8) -> u8 {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `Command { std: "docker" "inspect" "cb50bba15b683e51161496130bcb1681f35fad190f6ed577ca32a44cf53c810c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb50bba15b683e51161496130bcb1681f35fad190f6ed577ca32a44cf53c810c", kill_on_drop: false }`
[INFO] [stdout] cb50bba15b683e51161496130bcb1681f35fad190f6ed577ca32a44cf53c810c