Codegear Rad Studio 2009 -update 1-4- 12.0.3420.21218.1 Apr 2026

The corrupted DLL was calling a function named GetWaterFlow . But the original GetWaterFlow expected a PChar with a trailing null. The new DLL passed a String . In every other version of Delphi, that was fine—they were compatible. But in 12.0.3420.21218.1, the compiler's internal TObject.Free method had a one-cycle delay before releasing the string’s reference count. It was a threading bug that had been fixed in Update 5, which was never released.

He looked at the splash screen one last time. CodeGear RAD Studio 2009 - Update 1-4 - 12.0.3420.21218.1. Not the fastest. Not the newest. But for one more night, it was the most important compiler on Earth. CodeGear RAD Studio 2009 -Update 1-4- 12.0.3420.21218.1

Jenna let out a breath she didn’t know she was holding. “What… what did you just do?” The corrupted DLL was calling a function named GetWaterFlow