GeezerVison

The test expected a 256 handoff chain to overflow a 256 KB thread stack, which held on macOS but not on Linux JDK 25 in CI, where the chain fits and the getter correctly returns true. It now checks what every platform guarantees: the getter never throws, and a failure is reported once. A new test forces a stack overflow at the innermost dependency through a module, so the overflow path is covered everywhere.