Created attachment 605 [details]
archive with source code

module common;

class A {}
class B {}

//--------------------------

module import1;

import common;

void foo(B b) {}

//--------------------------

module import2;

import common;

void foo(A a) {}

//--------------------------

module test;

import common, import1, import2;

void main()
{
    auto b = new B;
    foo(b);
}

//--------------------------

>dmd test.d common.d import1.d import2.d
test.d(8): Error: import1.foo at import1.d(5) conflicts with import2.foo at
import2.d(5)

reproduced on WinXP with DMD 1.051 and 1.057


workaround:

module test;

import common;

import import1 : fooo = foo;
import import2 : fooo = foo;

void main()
{
    auto b = new B;
    fooo(b);
}