[INFO] updating cached repository muggenhor/rudoku
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/muggenhor/rudoku
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/muggenhor/rudoku" "work/ex/beta-1.37-6/sources/1.36.0/gh/muggenhor/rudoku"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/muggenhor/rudoku'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/muggenhor/rudoku" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/muggenhor/rudoku"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/muggenhor/rudoku'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e56514818b3e07b6644c305613068004d23f7ccf
[INFO] sha for GitHub repo muggenhor/rudoku: e56514818b3e07b6644c305613068004d23f7ccf
[INFO] validating manifest of muggenhor/rudoku on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of muggenhor/rudoku on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing muggenhor/rudoku
[INFO] finished frobbing muggenhor/rudoku
[INFO] frobbed toml for muggenhor/rudoku written to work/ex/beta-1.37-6/sources/1.36.0/gh/muggenhor/rudoku/Cargo.toml
[INFO] started frobbing muggenhor/rudoku
[INFO] finished frobbing muggenhor/rudoku
[INFO] frobbed toml for muggenhor/rudoku written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/muggenhor/rudoku/Cargo.toml
[INFO] crate muggenhor/rudoku already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/muggenhor/rudoku/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing muggenhor/rudoku against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/muggenhor/rudoku:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] a2a469f4f147ce981c5f0c2148989491b074c2d0511c27e547b766ea69ef8c6c
[INFO] running `"docker" "start" "-a" "a2a469f4f147ce981c5f0c2148989491b074c2d0511c27e547b766ea69ef8c6c"`
[INFO] [stderr]    Compiling env_logger v0.3.5
[INFO] [stderr]    Compiling rudoku v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/rudoku/mod.rs:47:18
[INFO] [stderr]    |
[INFO] [stderr] 47 |         for i in (0 .. 9) {
[INFO] [stderr]    |                  ^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/rudoku/mod.rs:67:20
[INFO] [stderr]    |
[INFO] [stderr] 67 |         for row in (0 .. self.cells.len()) {
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/rudoku/mod.rs:68:24
[INFO] [stderr]    |
[INFO] [stderr] 68 |             for col in (0 .. self.cells[row].len()) {
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/rudoku/mod.rs:85:20
[INFO] [stderr]    |
[INFO] [stderr] 85 |         for row in (0 .. self.cells.len()) {
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/rudoku/mod.rs:101:32
[INFO] [stderr]     |
[INFO] [stderr] 101 |                     for col in (0 .. self.cells[row].len()) {
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/rudoku/mod.rs:111:20
[INFO] [stderr]     |
[INFO] [stderr] 111 |         for col in (0 .. self.cells[0].len()) {
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/rudoku/mod.rs:113:24
[INFO] [stderr]     |
[INFO] [stderr] 113 |             for row in (0 .. self.cells.len()) {
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/rudoku/mod.rs:118:24
[INFO] [stderr]     |
[INFO] [stderr] 118 |             for row in (0 .. self.cells.len()) {
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/rudoku/mod.rs:127:32
[INFO] [stderr]     |
[INFO] [stderr] 127 |                     for row in (0 .. self.cells.len()) {
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/rudoku/mod.rs:137:26
[INFO] [stderr]     |
[INFO] [stderr] 137 |         for row_block in (0 .. 3) {
[INFO] [stderr]     |                          ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/rudoku/mod.rs:138:30
[INFO] [stderr]     |
[INFO] [stderr] 138 |             for col_block in (0 .. 3) {
[INFO] [stderr]     |                              ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/rudoku/mod.rs:141:26
[INFO] [stderr]     |
[INFO] [stderr] 141 |                 for i in (0 .. 9) {
[INFO] [stderr]     |                          ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/rudoku/mod.rs:150:26
[INFO] [stderr]     |
[INFO] [stderr] 150 |                 for i in (0 .. 9) {
[INFO] [stderr]     |                          ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/rudoku/mod.rs:163:34
[INFO] [stderr]     |
[INFO] [stderr] 163 |                         for i in (0 .. 9) {
[INFO] [stderr]     |                                  ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around method argument
[INFO] [stderr]    --> src/rudoku/mod.rs:271:64
[INFO] [stderr]     |
[INFO] [stderr] 271 |             '1'...'9' => cur_puzzle.set_item(col_num, row_num, (c as usize - '0' as usize)),
[INFO] [stderr]     |                                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.66s
[INFO] running `"docker" "inspect" "a2a469f4f147ce981c5f0c2148989491b074c2d0511c27e547b766ea69ef8c6c"`
[INFO] running `"docker" "rm" "-f" "a2a469f4f147ce981c5f0c2148989491b074c2d0511c27e547b766ea69ef8c6c"`
[INFO] [stdout] a2a469f4f147ce981c5f0c2148989491b074c2d0511c27e547b766ea69ef8c6c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/muggenhor/rudoku:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 4795f4e9398a1d58c9a0129cd077bd4c01822997deec096fcd443165b16e59a6
[INFO] running `"docker" "start" "-a" "4795f4e9398a1d58c9a0129cd077bd4c01822997deec096fcd443165b16e59a6"`
[INFO] [stderr]    Compiling rudoku v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/rudoku/mod.rs:47:18
[INFO] [stderr]    |
[INFO] [stderr] 47 |         for i in (0 .. 9) {
[INFO] [stderr]    |                  ^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/rudoku/mod.rs:67:20
[INFO] [stderr]    |
[INFO] [stderr] 67 |         for row in (0 .. self.cells.len()) {
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/rudoku/mod.rs:68:24
[INFO] [stderr]    |
[INFO] [stderr] 68 |             for col in (0 .. self.cells[row].len()) {
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/rudoku/mod.rs:85:20
[INFO] [stderr]    |
[INFO] [stderr] 85 |         for row in (0 .. self.cells.len()) {
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/rudoku/mod.rs:101:32
[INFO] [stderr]     |
[INFO] [stderr] 101 |                     for col in (0 .. self.cells[row].len()) {
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/rudoku/mod.rs:111:20
[INFO] [stderr]     |
[INFO] [stderr] 111 |         for col in (0 .. self.cells[0].len()) {
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/rudoku/mod.rs:113:24
[INFO] [stderr]     |
[INFO] [stderr] 113 |             for row in (0 .. self.cells.len()) {
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/rudoku/mod.rs:118:24
[INFO] [stderr]     |
[INFO] [stderr] 118 |             for row in (0 .. self.cells.len()) {
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/rudoku/mod.rs:127:32
[INFO] [stderr]     |
[INFO] [stderr] 127 |                     for row in (0 .. self.cells.len()) {
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/rudoku/mod.rs:137:26
[INFO] [stderr]     |
[INFO] [stderr] 137 |         for row_block in (0 .. 3) {
[INFO] [stderr]     |                          ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/rudoku/mod.rs:138:30
[INFO] [stderr]     |
[INFO] [stderr] 138 |             for col_block in (0 .. 3) {
[INFO] [stderr]     |                              ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/rudoku/mod.rs:141:26
[INFO] [stderr]     |
[INFO] [stderr] 141 |                 for i in (0 .. 9) {
[INFO] [stderr]     |                          ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/rudoku/mod.rs:150:26
[INFO] [stderr]     |
[INFO] [stderr] 150 |                 for i in (0 .. 9) {
[INFO] [stderr]     |                          ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/rudoku/mod.rs:163:34
[INFO] [stderr]     |
[INFO] [stderr] 163 |                         for i in (0 .. 9) {
[INFO] [stderr]     |                                  ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around method argument
[INFO] [stderr]    --> src/rudoku/mod.rs:271:64
[INFO] [stderr]     |
[INFO] [stderr] 271 |             '1'...'9' => cur_puzzle.set_item(col_num, row_num, (c as usize - '0' as usize)),
[INFO] [stderr]     |                                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.99s
[INFO] running `"docker" "inspect" "4795f4e9398a1d58c9a0129cd077bd4c01822997deec096fcd443165b16e59a6"`
[INFO] running `"docker" "rm" "-f" "4795f4e9398a1d58c9a0129cd077bd4c01822997deec096fcd443165b16e59a6"`
[INFO] [stdout] 4795f4e9398a1d58c9a0129cd077bd4c01822997deec096fcd443165b16e59a6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/muggenhor/rudoku:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 5400a01bd0683a4aac96b2d0ce1eb438425af19cfc5ce216646175b8a7720abd
[INFO] running `"docker" "start" "-a" "5400a01bd0683a4aac96b2d0ce1eb438425af19cfc5ce216646175b8a7720abd"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rudoku-d7d2a496e4685749
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test::test_can_solve_puzzle ... ok
[INFO] [stdout] test test::test_can_solve_empty_puzzle ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "5400a01bd0683a4aac96b2d0ce1eb438425af19cfc5ce216646175b8a7720abd"`
[INFO] running `"docker" "rm" "-f" "5400a01bd0683a4aac96b2d0ce1eb438425af19cfc5ce216646175b8a7720abd"`
[INFO] [stdout] 5400a01bd0683a4aac96b2d0ce1eb438425af19cfc5ce216646175b8a7720abd