Re: sqrt with negative arg.

[Andreas Schwab]

Luc Teirlinck <address@hidden> writes:

> A few hours ago, the documentation of sqrt in numbers.texi was
> changed from saying that it returns a NaN to saying that it signals a
> domain-error.  It definitely returns a NaN on my machine.

This is a bug either in sqrt or in matherr on your system.  ISO C
requires that a domain error occurs when sqrt is called with a
negative argument, and Emacs depends on matherr (when it is supported)
to be called.  Apparently, the availability of matherr is not enough
to guarantee this.

Andreas.

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Andreas Schwab, SuSE Labs, address@hidden
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