What's the longest function name you've ever come across?
Mine is public function testDeliveryAddressIsBasedOnBillingAddressIfThereIsNoOrderDeliveryAddress()
Do post-mangling C++ template names count? I had a CS class (many many years ago) where they were using templates to turn C++ into Modula-2; the last assignment was cancelled because the templates involved overflowed the linker's 512-character name limit!