[INFO] cloning repository https://github.com/muggenhor/rudoku
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/muggenhor/rudoku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuggenhor%2Frudoku", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuggenhor%2Frudoku'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e56514818b3e07b6644c305613068004d23f7ccf
[INFO] checking muggenhor/rudoku against master#c9228570668803e3e6402770d55f23a12c9ae686 for pr-79472
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuggenhor%2Frudoku" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/muggenhor/rudoku on toolchain c9228570668803e3e6402770d55f23a12c9ae686
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/muggenhor/rudoku
[INFO] finished tweaking git repo https://github.com/muggenhor/rudoku
[INFO] tweaked toml for git repo https://github.com/muggenhor/rudoku written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/muggenhor/rudoku already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: the lock file /workspace/builds/worker-2/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 019d5b62001c0cc0e380ebed5fa930447da65dd5eef7bd101f6f2d6937a037e8
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "019d5b62001c0cc0e380ebed5fa930447da65dd5eef7bd101f6f2d6937a037e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "019d5b62001c0cc0e380ebed5fa930447da65dd5eef7bd101f6f2d6937a037e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "019d5b62001c0cc0e380ebed5fa930447da65dd5eef7bd101f6f2d6937a037e8", kill_on_drop: false }`
[INFO] [stdout] 019d5b62001c0cc0e380ebed5fa930447da65dd5eef7bd101f6f2d6937a037e8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1ffbe23a4b3cf3340d03f67f047b6f8b1656bdca21161a17e531fc5bf20e3aa7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1ffbe23a4b3cf3340d03f67f047b6f8b1656bdca21161a17e531fc5bf20e3aa7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking env_logger v0.3.5
[INFO] [stderr]     Checking rudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/rudoku/mod.rs:47:18
[INFO] [stdout]    |
[INFO] [stdout] 47 |         for i in (0 .. 9) {
[INFO] [stdout]    |                  ^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/rudoku/mod.rs:67:20
[INFO] [stdout]    |
[INFO] [stdout] 67 |         for row in (0 .. self.cells.len()) {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/rudoku/mod.rs:68:24
[INFO] [stdout]    |
[INFO] [stdout] 68 |             for col in (0 .. self.cells[row].len()) {
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/rudoku/mod.rs:85:20
[INFO] [stdout]    |
[INFO] [stdout] 85 |         for row in (0 .. self.cells.len()) {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:101:32
[INFO] [stdout]     |
[INFO] [stdout] 101 |                     for col in (0 .. self.cells[row].len()) {
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:111:20
[INFO] [stdout]     |
[INFO] [stdout] 111 |         for col in (0 .. self.cells[0].len()) {
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:113:24
[INFO] [stdout]     |
[INFO] [stdout] 113 |             for row in (0 .. self.cells.len()) {
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:118:24
[INFO] [stdout]     |
[INFO] [stdout] 118 |             for row in (0 .. self.cells.len()) {
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:127:32
[INFO] [stdout]     |
[INFO] [stdout] 127 |                     for row in (0 .. self.cells.len()) {
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:137:26
[INFO] [stdout]     |
[INFO] [stdout] 137 |         for row_block in (0 .. 3) {
[INFO] [stdout]     |                          ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:138:30
[INFO] [stdout]     |
[INFO] [stdout] 138 |             for col_block in (0 .. 3) {
[INFO] [stdout]     |                              ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:141:26
[INFO] [stdout]     |
[INFO] [stdout] 141 |                 for i in (0 .. 9) {
[INFO] [stdout]     |                          ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:150:26
[INFO] [stdout]     |
[INFO] [stdout] 150 |                 for i in (0 .. 9) {
[INFO] [stdout]     |                          ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:163:34
[INFO] [stdout]     |
[INFO] [stdout] 163 |                         for i in (0 .. 9) {
[INFO] [stdout]     |                                  ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/rudoku/mod.rs:271:16
[INFO] [stdout]     |
[INFO] [stdout] 271 |             '1'...'9' => cur_puzzle.set_item(col_num, row_num, (c as usize - '0' as usize)),
[INFO] [stdout]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]    --> src/rudoku/mod.rs:271:64
[INFO] [stdout]     |
[INFO] [stdout] 271 |             '1'...'9' => cur_puzzle.set_item(col_num, row_num, (c as usize - '0' as usize)),
[INFO] [stdout]     |                                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/rudoku/mod.rs:47:18
[INFO] [stdout]    |
[INFO] [stdout] 47 |         for i in (0 .. 9) {
[INFO] [stdout]    |                  ^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/rudoku/mod.rs:67:20
[INFO] [stdout]    |
[INFO] [stdout] 67 |         for row in (0 .. self.cells.len()) {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/rudoku/mod.rs:68:24
[INFO] [stdout]    |
[INFO] [stdout] 68 |             for col in (0 .. self.cells[row].len()) {
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/rudoku/mod.rs:85:20
[INFO] [stdout]    |
[INFO] [stdout] 85 |         for row in (0 .. self.cells.len()) {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:101:32
[INFO] [stdout]     |
[INFO] [stdout] 101 |                     for col in (0 .. self.cells[row].len()) {
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:111:20
[INFO] [stdout]     |
[INFO] [stdout] 111 |         for col in (0 .. self.cells[0].len()) {
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:113:24
[INFO] [stdout]     |
[INFO] [stdout] 113 |             for row in (0 .. self.cells.len()) {
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:118:24
[INFO] [stdout]     |
[INFO] [stdout] 118 |             for row in (0 .. self.cells.len()) {
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:127:32
[INFO] [stdout]     |
[INFO] [stdout] 127 |                     for row in (0 .. self.cells.len()) {
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:137:26
[INFO] [stdout]     |
[INFO] [stdout] 137 |         for row_block in (0 .. 3) {
[INFO] [stdout]     |                          ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:138:30
[INFO] [stdout]     |
[INFO] [stdout] 138 |             for col_block in (0 .. 3) {
[INFO] [stdout]     |                              ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:141:26
[INFO] [stdout]     |
[INFO] [stdout] 141 |                 for i in (0 .. 9) {
[INFO] [stdout]     |                          ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:150:26
[INFO] [stdout]     |
[INFO] [stdout] 150 |                 for i in (0 .. 9) {
[INFO] [stdout]     |                          ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/rudoku/mod.rs:163:34
[INFO] [stdout]     |
[INFO] [stdout] 163 |                         for i in (0 .. 9) {
[INFO] [stdout]     |                                  ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/rudoku/mod.rs:271:16
[INFO] [stdout]     |
[INFO] [stdout] 271 |             '1'...'9' => cur_puzzle.set_item(col_num, row_num, (c as usize - '0' as usize)),
[INFO] [stdout]     |                ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]    --> src/rudoku/mod.rs:271:64
[INFO] [stdout]     |
[INFO] [stdout] 271 |             '1'...'9' => cur_puzzle.set_item(col_num, row_num, (c as usize - '0' as usize)),
[INFO] [stdout]     |                                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.78s
[INFO] running `Command { std: "docker" "inspect" "1ffbe23a4b3cf3340d03f67f047b6f8b1656bdca21161a17e531fc5bf20e3aa7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ffbe23a4b3cf3340d03f67f047b6f8b1656bdca21161a17e531fc5bf20e3aa7", kill_on_drop: false }`
[INFO] [stdout] 1ffbe23a4b3cf3340d03f67f047b6f8b1656bdca21161a17e531fc5bf20e3aa7