He scanned the calculateTax method. There it was. A line of logic that read:
The first result was a familiar, minimalist website with a generic name: JavaDecompiler.online . No logos, no paywalls, just a big gray box that said, “Drop .jar, .class, or .java file here.” online java decompiler
He fixed the caller code, pushed the change, and the error vanished. But online decompilers have a shadow side. He scanned the calculateTax method