...longjmp().¹

In order to support optimization of separately compiled C programs while providing setjmp() and longjmp() as library functions, the C standards allow variables after a longjmp() to have any value they might have attained since the corresponding setjmp(), except for volatile variables.

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... free''²

As in beer.

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... language.³

Nickle's exponentiation operator ** with an integer base has an integer result when the exponent is a natural number, but a rational result with negative integer argument. This proves to be quite problematic in balancing usability and static typing, and static typing currently loses.

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... implementation,⁴

Several potential floating point representations were considered. In particular, interval arithmetic [Kea96], while in some ways preferable, was not chosen due to performance concerns.

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... superior⁵

Nickle's overhead is considerably larger than those of the listed programs. In practice, this is not a noticeable problem on modern UNIX platforms.

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