How do I verify a bug fix in my game?

Verify a bug fix by confirming the issue stops occurring after the fix ships, checking that you did not introduce a new problem, and monitoring that the fix holds. Step one, confirm the issue stops: for a crash, the crash signature should stop occurring (or drop sharply) in the version with the fix, on real player data, the true test is whether the issue stops happening in the real world, not whether the code looks right. Step two, check for new problems: verify the fix did not introduce a new crash or bug, since a fix can resolve one issue while causing another. Step three, monitor that it holds: confirm the issue stays resolved as more players run the fixed version, rather than concluding too early from a small sample. A fix you do not verify is a fix you are not sure worked, especially for issues you could not reproduce locally (where the real-world data is your only confirmation). Bugnet provides the verification: it tracks crashes per version, so after you ship a fix you see whether the crash signature stops in the new version, whether any new crash appeared, and whether the fix holds as more players run it, confirming the fix worked against real-world conditions, which is how you verify a bug fix in your game.

How do I know if a fix actually worked?

Know if a fix actually worked by tracking the issue after the fix ships and confirming it stops occurring on real player data, rather than assuming it worked because the code looks correct or it works in your testing. The reliable signal is the real-world data: if the crash or bug was occurring at some rate before the fix and stops (or drops sharply) in the version with the fix, the fix worked; if it keeps occurring in the fixed version, it did not (or only partially did). This is especially important for issues you could not reproduce locally, where your testing cannot confirm the fix, only the real-world behavior can. You also want to confirm the fix did not introduce a new problem (a different crash appearing in the fixed version). And you want to watch long enough to be sure (not conclude from a tiny early sample). This requires tracking the issue by version on real player data. Bugnet provides it: it tracks crashes per version, so you can see whether the crash signature stops in the version with your fix, whether any new crash appeared, and whether it stays gone, confirming the fix worked against real-world conditions, which is how you know if a fix actually worked.

Why should I verify fixes for bugs I can't reproduce?

You should especially verify fixes for bugs you cannot reproduce because, without reproduction, you have no other way to confirm the fix worked, you fixed the bug based on inference rather than direct observation, so the real-world behavior after the fix is your only confirmation. For a bug you can reproduce, you can test the fix directly (reproduce, apply fix, confirm it no longer reproduces). For a bug you cannot reproduce (because it depends on conditions you have not replicated), you cannot test it that way, you made your best-guess fix based on the evidence (stack trace, conditions, breadcrumbs), but you do not actually know it worked until you see whether the bug stops happening in the field. So verification via real-world data is not optional for unreproducible bugs, it is the only verification available. Shipping an unverified fix for an unreproducible bug means you might think it is fixed when it is not (or you fixed one cause of a multi-cause crash). Bugnet provides the verification: it tracks crashes per version, so after you ship a fix for an unreproducible crash, you see whether the crash signature actually stops occurring in the new version on real player data, confirming whether your inferred fix worked, which is why you should verify fixes for bugs you cannot reproduce and how to do it.

Steps to Verify a Fix

Quick answer: To verify a fix: confirm the issue stops occurring after the fix ships (ideally per version on real data), check it did not introduce a new problem, and monitor that it holds.

A fix is not done until it is verified. These are the steps to confirm a fix actually worked.

Step 1: Confirm the Issue Stops Occurring

Start by confirming the issue actually stops after the fix ships: for a crash, the crash signature should stop occurring (or drop sharply) in the version with the fix, on real player data. The true test is whether the issue stops happening in the real world, not whether the code looks right.

Bugnet provides this confirmation: it tracks crashes per version, so after you ship a fix, you see whether the crash signature stops occurring in the new version on real player data, confirming the fix worked against the real-world conditions, the only true test, especially for issues you could not reproduce.

Step 2: Check You Did Not Introduce a New Problem

Next, check that the fix did not introduce a new problem: a fix can resolve one issue while causing another, so verify that no new crash or bug appeared in the fixed version. Verification covers both halves, the old issue gone and no new issue introduced.

Bugnet helps here too: by tracking crashes per version, it shows whether any new crash signature appeared in the version with your fix, so you catch a fix that introduced a regression immediately, ensuring your fix resolved the issue without breaking something else.

Step 3: Monitor That the Fix Holds

Finally, monitor that the fix holds over time: confirm the issue stays resolved as more players run the fixed version, rather than concluding too early from a small sample. A fix is verified when the issue is reliably gone across your player base, so keep watching until you are confident.

Bugnet's ongoing per-version monitoring confirms the fix holds: as more players run the fixed version, you see whether the crash stays gone, so you can be confident the fix is durable rather than concluding from early data, and if the issue resurfaces, you know immediately, completing the verification.

To verify a fix: confirm the issue stops occurring after the fix ships (per version on real data), check you did not introduce a new problem, and monitor that it holds, a fix you do not verify is a fix you are not sure worked.