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Thomas Bushnell BSG <tb@xxxxxxxxxx> writes: > You could turn on a special "track source on NaNs" feature, which > squirrels away, say, a complete stack record (or something less > perhaps, depending on what you ask for), and then every NaN generated > now gets tagged with a *very* nice handle for debugging. This can be done by changing the implementation of arithmetic to produce those special values with traces *instead* of regular NaNs. There is no need to change the semantics of IEEE NaNs. -- __("< Marcin Kowalczyk \__/ qrczak@xxxxxxxxxx ^^ http://qrnik.knm.org.pl/~qrczak/