[Bug fortran/19904] Division by zero leads to error

[schnetter at aei dot mpg dot de]

------- Additional Comments From schnetter at aei dot mpg dot de  2005-02-11 17:17 -------
Actually, gfortran handles nans correctly (according to the IEEE standard) in 
all other cases.  I can e.g. generate a nan through the expression a/b, if I 
only hide from the compiler the fact that b is zero, so that it generates code 
that performs the division at run time, and does not try to evaluate it at 
compile time. 
 
Also, while your argument is correct that the Fortran 95 standard does not 
require nans to be handled correctly, your code is also undefined according to 
the Fortran 95 standard, because you use the variable "nan" without defining 
it: if you assign to an equivalenced storage an integer value, then you are 
only allowed to read out the integer value, and vice versa for the real value. 
 

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19904