CLHS: Section 3.5.1.4

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## 3.5.1.4 Unrecognized Keyword Arguments

It is not permitted to supply a keyword argument to a function using a name that is not recognized by that function unless keyword argument checking is suppressed as described in Section 3.4.1.4.1 (Suppressing Keyword Argument Checking).

If this situation occurs in a safe call, an error of type program-error must be signaled; and in an unsafe call the situation has undefined consequences.

The following X3J13 cleanup issue, not part of the specification, applies to this section:

- ARGUMENT-MISMATCH-ERROR-MOON:FIX

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