id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
6938	weibull_distribution accepts shape == 0, but shape should be >0	Florian Schoppmann <Florian.Schoppmann@…>	John Maddock	"In function `check_weibull_shape()` in file `math/distributions/weibull.hpp` a domain error is only raised if `shape < 0`. The error condition should probably be `shape <= 0`. With `shape == 0`, the Weibull distribution is not well-defined. Also, `shape == 0` contradicts the error message in the same function.

E.g., the following example raises an overflow error, but not a domain error (as would be more appropriate IMHO):
{{{
#include <boost/math/distributions/weibull.hpp>
using namespace boost::math;
int main() {
    std::cout << mean(weibull(0)) << std::endl;
}
}}}"	Bugs	closed	Boost 1.51.0	math	Boost 1.49.0	Problem	fixed		pbristow@…