=== a.d ===
module a;

import b;
import c;

void main()
{
	func();
}
=== b.d ===
module b;

private void func()
{
}
=== c.d ===
module c;

void func()
{
}
=== compiler output ===
a.d(8): Error: b.func at b.d(3) conflicts with c.func at c.d(3)
a.d: module a b.func is private
a.d(8): Error: function b.func is not accessible from a

Changing the import order removes the last two errors.

Particularly annoying in some cases with Phobos (e.g. std.string.iswhite and std.stream.iswhite).