Ruby Exceptions Hierarchy

gistfile1.txt

Object
+--Exception
+--NoMemoryError
+--ScriptError
|   +--LoadError
|   +--NotImplementedError
|   +--SyntaxError
+--SecurityError                 # Was a StandardError in 1.8
+--SignalException
|   +--Interrupt
+--SystemExit
+--SystemStackError              # Was a StandardError in 1.8
+--StandardError
    +--ArgumentError
    +--FiberError                # New in 1.9
    +--IOError
    |   +--EOFError
    +--IndexError
    |   +--KeyError              # New in 1.9
    |   +--StopIteration         # New in 1.9
    +--LocalJumpError
    +--NameError
    |   +--NoMethodError
    +--RangeError
    |   +--FloatDomainError
    +--RegexpError
    +--RuntimeError
    +--SystemCallError
    +--ThreadError
    +--TypeError
    +--ZeroDivisionError