Odd Number of Keyword Arguments (ANSI and GNU Common Lisp Document)

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#### 3.5.1.7 Odd Number of Keyword Arguments

An odd number of arguments must not be supplied for the keyword parameters.

If this situation occurs in a safe call,

an error of type program-error must be signaled unless keyword argument checking is suppressed as described in Suppressing Keyword Argument Checking; and in an unsafe call the situation has undefined consequences.