Bug Hunt
The Enum Case Nobody Handled and the Compiler Did Not Catch
A new status was added to the model and the match statement had no default, so the new value fell through to the fallback branch, and the order was silently…
Bug Hunt
The Sort That Changed Order Between Two Servers
The collation differed between the containers, so the same query returned the rows in a different order, and the pagination showed duplicates and gaps…
Bug Hunt
The Loop That Deleted From the Dict It Was Reading
The cleanup removed expired entries while iterating the mapping, and the interpreter raised the size-changed error, and on the runs that did not raise it…
Bug Hunt
The Zip Code That Lost Its Leading Zero
The field was parsed as a number on import, so the codes starting with zero lost a digit, and the shipping lookup failed for a whole region, and the failure…
Bug Hunt
The List That Changed Because Two Variables Held the Same Array
The helper sorted the array in place and returned it, so the caller's original was reordered too, and the second consumer saw a list nobody had touched, and…
Bug Hunt
The Order ID That Lost Its Last Three Digits in JavaScript
The identifier came back from the API as a number, and the number exceeded the safe integer range, so the parsed value rounded, and the lookup found a…
Bug Hunt
The Comparator That Broke the Transitive Contract
The sort threw an inconsistent comparison error on one dataset, because the comparator said a beat b and b beat c but c beat a, and the sort trusted the…
Bug Hunt
The Greedy Regex That Swallowed Three Fields at Once
The pattern matched as much as it could instead of as little as it needed, so one capture group ate the delimiter and the two fields after it, and the parse…
Bug Hunt
The Coupon That Applied Twice When the Customer Retried
The checkout request timed out but the server had already applied the discount, so the retry applied it again, and the order total went below the coupon's…
Bug Hunt
The Embedding Swap That Silently Broke Semantic Search
A newer embedding model went live for queries while the index still held the old vectors, and the two spaces were unrelated, so similarity became noise and…
Bug Hunt
The Model-Written Regex That Took Nine Minutes on One Input
The generated pattern passed every test in the suite, then a single long string made it run for nine minutes. The pattern was not wrong.
Bug Hunt
The Timezone-Naive Datetime That Sorted Backwards
The report listed tomorrow's events before today's, and the comparison never raised an error, only returned the wrong order, because aware and naive…