Test-case reducers are underappreciated debugging tools

Test-case reducers are underutilized debugging tools that automatically shrink program inputs to identify which parts cause errors or crashes. By automating the manual and tedious process of removing input portions to isolate bugs, these tools can achieve 95-99% reductions in test case size, making debugging significantly easier. Despite their effectiveness, test-case reducers remain underappreciated outside compiler development communities, partly because their seemingly magical capabilities mask their relatively straightforward operation.