id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
5501	randomR overflow	daniel.is.fischer	rrnewton	"When given a large range, `randomR` overflows at `Double` etc.

`randomIvalDouble` has two problems: first, the calculation of the center, `(l+h)/2` overflows if the range is located near `±Infinity`; second, and that concerns also `randomRFloating`, the scaling factor `(h-l)` overflows if the range is large enough.

Both problems can be fixed ""well enough"" by multiplying the bounds by 0.5 before the calculations and scaling up at the end,
{{{
0.5*l + 0.5*h instead of (l+h)/2
(0.5*h - 0.5*l)/(0.5*realToFrac int32Count) in randomIvalDouble
2.0*(0.5*l + coef*(0.5*h - 0.5*l)) in randomRFloating
}}}
These transformations can introduce a small error when a subnormal number is involved, but I think we can ignore that (no sane person would have a [nonzero] subnormal number as a bound, and a correct-for-all-cases transformation would be somewhat convoluted).
"	bug	closed	normal		libraries/random	7.2.1	fixed			Unknown/Multiple	Unknown/Multiple	Incorrect result at runtime