method—a method.
format-control—a format control.
args—format arguments for the format-control.
The function invalid-method-error is used to signal an error of type error
when there is an applicable method whose qualifiers are not valid for
the method combination type. The error message is constructed by
using the format-control suitable for format
and any args to it. Because an
implementation may need to add additional contextual information to
the error message, invalid-method-error should be called only
within the dynamic extent of a method combination function.
The function invalid-method-error is called automatically when a
method fails to satisfy every qualifier pattern and predicate in a
define-method-combination form. A method combination function
that imposes additional restrictions should call
invalid-method-error explicitly if it encounters a method
it cannot accept.
Whether invalid-method-error returns to its caller or exits via
throw is implementation-dependent.
The debugger might be entered.
*break-on-signals*