The following code sample fails in all cases:

import std.stdio;                                                                                                                                                                                                    
void main()                                                                                                                                                                                                          
{                                                                                                                                                                                                                    
    class test                                                                                                                                                                                                       
    {                                                                                                                                                                                                                
        this(double t)
        {

        }
    };

    struct testStruct
    {
        this(double t)
        {
        }
    };

    double b = 2;
    double c = 4;

    void funcTest(double t)
    {
    }

    //testStruct( b /= c ); // <-- Internal error: backend/cg87.c 202 when pulled in
    //new test( b /= c ); // <-- Internal error: backend/cg87.c 202 when pulled in
    funcTest(b *= c);   // <-- Internal error: backend/cg87.c 202

    writefln("b = %1$s", b);
}