[INFO] cloning repository https://github.com/tvolk131/sudoku_solver [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tvolk131/sudoku_solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftvolk131%2Fsudoku_solver", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftvolk131%2Fsudoku_solver'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] ff57a004761f3729545ff9082df12a2397b5835c [INFO] testing tvolk131/sudoku_solver against try#a7ce54db9b096bd1098d07c645b489195a667c9f for pr-137940 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftvolk131%2Fsudoku_solver" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/tvolk131/sudoku_solver on toolchain a7ce54db9b096bd1098d07c645b489195a667c9f [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/tvolk131/sudoku_solver [INFO] finished tweaking git repo https://github.com/tvolk131/sudoku_solver [INFO] tweaked toml for git repo https://github.com/tvolk131/sudoku_solver written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/tvolk131/sudoku_solver 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" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 4be2f59c5eec39df493dbd01015122d565dddce0f0bc309baf704f57042d39f9 [INFO] running `Command { std: "docker" "start" "-a" "4be2f59c5eec39df493dbd01015122d565dddce0f0bc309baf704f57042d39f9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "4be2f59c5eec39df493dbd01015122d565dddce0f0bc309baf704f57042d39f9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4be2f59c5eec39df493dbd01015122d565dddce0f0bc309baf704f57042d39f9", kill_on_drop: false }` [INFO] [stdout] 4be2f59c5eec39df493dbd01015122d565dddce0f0bc309baf704f57042d39f9 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 24b9f648f10682a5a8afdccf0226edd23802880c55c804c8a3941d2540c6da93 [INFO] running `Command { std: "docker" "start" "-a" "24b9f648f10682a5a8afdccf0226edd23802880c55c804c8a3941d2540c6da93", kill_on_drop: false }` [INFO] [stderr] Compiling sudoku_solver v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/puzzle.rs:235:21 [INFO] [stdout] | [INFO] [stdout] 235 | for i in 0..self.get_width() + self.get_block_width() { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/puzzle.rs:258:13 [INFO] [stdout] | [INFO] [stdout] 258 | for i in 0..self.get_width() + 2 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `get_column` is never used [INFO] [stdout] --> src/puzzle.rs:187:12 [INFO] [stdout] | [INFO] [stdout] 5 | impl SudokuPuzzle { [INFO] [stdout] | ----------------- method in this implementation [INFO] [stdout] ... [INFO] [stdout] 187 | pub fn get_column(&self, mut column_index: usize) -> Vec<&SudokuPuzzleCell> { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `get_block_column` is never used [INFO] [stdout] --> src/puzzle.rs:341:8 [INFO] [stdout] | [INFO] [stdout] 271 | impl SudokuPuzzleBlock { [INFO] [stdout] | ---------------------- method in this implementation [INFO] [stdout] ... [INFO] [stdout] 341 | fn get_block_column(&self, column_index: usize) -> Vec<&SudokuPuzzleCell> { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `get_expert_puzzle_1` is never used [INFO] [stdout] --> src/sample_puzzles.rs:17:8 [INFO] [stdout] | [INFO] [stdout] 17 | pub fn get_expert_puzzle_1() -> SudokuPuzzle { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `get_insane_puzzle_1` is never used [INFO] [stdout] --> src/sample_puzzles.rs:31:8 [INFO] [stdout] | [INFO] [stdout] 31 | pub fn get_insane_puzzle_1() -> SudokuPuzzle { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement [INFO] [stdout] --> src/puzzle.rs:136:34 [INFO] [stdout] | [INFO] [stdout] 136 | for horizontal_blocks in self.block_rows.get_mut(block_index) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(for_loops_over_fallibles)]` on by default [INFO] [stdout] help: to check pattern in a loop use `while let` [INFO] [stdout] | [INFO] [stdout] 136 - for horizontal_blocks in self.block_rows.get_mut(block_index) { [INFO] [stdout] 136 + while let Some(horizontal_blocks) = self.block_rows.get_mut(block_index) { [INFO] [stdout] | [INFO] [stdout] help: consider using `if let` to clear intent [INFO] [stdout] | [INFO] [stdout] 136 - for horizontal_blocks in self.block_rows.get_mut(block_index) { [INFO] [stdout] 136 + if let Some(horizontal_blocks) = self.block_rows.get_mut(block_index) { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement [INFO] [stdout] --> src/puzzle.rs:157:34 [INFO] [stdout] | [INFO] [stdout] 157 | for horizontal_blocks in self.block_rows.get(block_index) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] help: to check pattern in a loop use `while let` [INFO] [stdout] | [INFO] [stdout] 157 - for horizontal_blocks in self.block_rows.get(block_index) { [INFO] [stdout] 157 + while let Some(horizontal_blocks) = self.block_rows.get(block_index) { [INFO] [stdout] | [INFO] [stdout] help: consider using `if let` to clear intent [INFO] [stdout] | [INFO] [stdout] 157 - for horizontal_blocks in self.block_rows.get(block_index) { [INFO] [stdout] 157 + if let Some(horizontal_blocks) = self.block_rows.get(block_index) { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: linking with `cc` failed: exit status: 1 [INFO] [stdout] | [INFO] [stdout] = note: "cc" "-m64" "/tmp/rustcO5YN33/symbols.o" "<4 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libstd-*,libpanic_unwind-*,libobject-*,libmemchr-*,libaddr2line-*,libgimli-*,librustc_demangle-*,libstd_detect-*,libhashbrown-*,librustc_std_workspace_alloc-*,libminiz_oxide-*,libadler2-*,libunwind-*,libcfg_if-*,liblibc-*,liballoc-*,librustc_std_workspace_core-*,libcore-*,libcompiler_builtins-*}.rlib" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-L" "/tmp/rustcO5YN33/raw-dylibs" "-B/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-fuse-ld=lld" "-Wl,-znostart-stop-gc" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/sudoku_solver-6fa3cc0d9fdfb91c" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-nodefaultlibs" [INFO] [stdout] = note: some arguments are omitted. use `--verbose` to show all linker arguments [INFO] [stdout] = note: collect2: fatal error: ld terminated with signal 7 [Bus error], core dumped [INFO] [stdout] compilation terminated. [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `sudoku_solver` (bin "sudoku_solver") due to 1 previous error; 8 warnings emitted [INFO] running `Command { std: "docker" "inspect" "24b9f648f10682a5a8afdccf0226edd23802880c55c804c8a3941d2540c6da93", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "24b9f648f10682a5a8afdccf0226edd23802880c55c804c8a3941d2540c6da93", kill_on_drop: false }` [INFO] [stdout] 24b9f648f10682a5a8afdccf0226edd23802880c55c804c8a3941d2540c6da93