Exception
Represents errors that occur during application execution.
Exception and its descendants are used to communicate between raise and
rescue statements in begin ... end blocks.
Exception objects carry information about the exception – its type (the
exception’s class name), an optional descriptive string, and
optional traceback information.
Exception subclasses may add additional information.
Instance methods
cause
Returns the previous exception at the time this exception was raised. This is useful for wrapping exceptions and retaining the original exception information.