What causes a pipe puzzle not detecting a fully connected path?

The win check tests pipe rotation angles by value instead of verifying that each pipe's open ends line up with its neighbors' open ends, so a path that looks connected is not recognized.

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 Pipe Puzzle Not Detecting a Fully Connected Path

Quick answer: Model each pipe as a set of open directions for its current rotation, then flood-fill from the source, stepping to a neighbor only when both pipes have matching open edges, and win when the sink is reached.

In a pipe-rotation puzzle, two adjacent pipes are connected only when each has an opening facing the other. Comparing rotation degrees is fragile. Represent open sides explicitly and traverse the connection graph.

How to fix it

1. Represent open sides per rotation

For each pipe shape and rotation, store which of the four edges (up, right, down, left) are open. Rotating cycles this set rather than just changing an angle number.

2. Connect only on matching openings

Two neighbors are linked only if the first pipe is open toward the second and the second is open back toward the first. A one-sided opening is not a connection.

3. Flood-fill from source to sink

Starting at the source, traverse linked neighbors with BFS or DFS. The puzzle is won when the traversal reaches the sink; re-run it after every rotation.

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 Godot 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.

A crash you can name from its stack trace is a crash you can usually fix in minutes.