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10 Error handling

10.1 ASDF errors

If ASDF detects an incorrect system definition, it will signal a generalised instance of SYSTEM-DEFINITION-ERROR.

Operations may go wrong (for example when source files contain errors). These are signalled using generalised instances of OPERATION-ERROR.

10.2 Compilation error and warning handling

ASDF checks for warnings and errors when a file is compiled. The variables *compile-file-warnings-behaviour* and *compile-file-errors-behavior* control the handling of any such events. The valid values for these variables are :error, :warn, and :ignore.