[libc++][test] Precondition violation in rand.dist.uni.real/param_ctor.pass.cpp

[StephanTLavavej]

llvm-project/libcxx/test/std/numerics/rand/rand.dist/rand.dist.uni/rand.dist.uni.real/param_ctor.pass.cpp

Lines 32 to 36 in ccae7b4

	typedef std::uniform_real_distribution<float> D;
	typedef D::param_type param_type;
	param_type p(5);
	assert(p.a() == 5);
	assert(p.b() == 1);

This violates the Standard's preconditions, and MSVC's STL asserts about it. The Standardese is N4986 [rand.req.dist]/9:

For each of the constructors of D taking arguments corresponding to parameters of the distribution, P shall have a corresponding constructor subject to the same requirements and taking arguments identical in number, type, and default values.

And [rand.dist.uni.real]/2:

explicit uniform_real_distribution(RealType a, RealType b = 1.0);
Preconditions: a <= b and b - a <= numeric_limits<RealType>::max().