What causes a nonogram solution check ignoring run order?

The validator only compares the total number of filled cells per line to the sum of its clues, so a line with the correct count but wrong groupings is wrongly accepted.

How do I catch this when it only happens for some players?

Capture it automatically from the player's device with the full stack trace, the device and OS, the build, and a breadcrumb trail of what they did. That turns a vague complaint into a specific, reproducible issue you can fix without owning the hardware it happens on.

How to Fix a Nonogram Solution Check Ignoring Run Order

Quick answer: For each row and column, extract the actual sequence of consecutive filled-cell run lengths and compare that list exactly to the line's clue list.

A nonogram clue like 2,1 means a run of two then a run of one, in that order, separated by at least one gap. Checking only the filled total accepts 1,2 or 3 as correct. Validate the run sequence, not the sum.

How to fix it

1. Extract runs per line

Walk each row and column, collecting the length of each maximal block of filled cells into an ordered list. Empty cells separate runs.

2. Compare lists exactly

The line is correct only when its run-length list equals the clue list element for element, including order and count. Any mismatch means the line is wrong.

3. Validate all lines for a win

The puzzle is solved only when every row and every column matches its clues. Re-run the per-line check on edits and trigger the win when all pass.

Catching the ones you can't reproduce

The hardest version of this to fix is the one you can't reproduce — it only happens on a player's hardware, OS, driver, or save state, under conditions that simply aren't present on your machine. A report that says “it crashed” or “it froze” gives you nothing to act on, so the bug survives release after release while quietly costing you players.

Automatic error capture closes that gap. Each failure arrives with its full stack trace, the device and OS, the build number, and a breadcrumb trail of what the player did right before it broke, so even a failure you have never seen becomes a specific, reproducible issue. Fold identical failures into one signature ranked by how many players each hits, and your worklist sorts itself worst-first instead of arriving as a stream of vague complaints.

This is where a tool like Bugnet earns its place. Its SDK captures every Pygame error automatically with the full stack trace plus device, OS, memory, build, and game-state context, folds duplicates into one grouped issue with an occurrence count, and ties each to the build it first appeared on — so you fix the problem that hurts the most players first and confirm it is gone when its signature disappears from the next release.

The bug you can't reproduce isn't gone — it's just invisible until you capture it from the player's device.