method-combination-error format-control &rest args → implementation-dependent

format-control — a format control.

args — format arguments for format-control.

The function method-combination-error is used to signal an error in method combination.

The error message is constructed by using a format-control suitable for format and any args to it. Because an implementation may need to add additional contextual information to the error message, method-combination-error should be called only within the dynamic extent of a method combination function.

Whether method-combination-error returns to its caller or exits via throw is implementation-dependent.

The debugger might be entered.

*break-on-signals*

define-method-combination