t7834neg.scala:48: error: type mismatch;
 found   : C.super.q.type (with underlying type M2)
 required: C.super.q.type
  x1 = x2  // fail
       ^
t7834neg.scala:50: error: type mismatch;
 found   : C.super.q.type (with underlying type M1)
 required: C.super.q.type
  x2 = x1  // fail
       ^
t7834neg.scala:53: error: type mismatch;
 found   : C.super.q.type (with underlying type M1)
 required: C.this.q.type
  x3 = x1  // fail
       ^
t7834neg.scala:54: error: type mismatch;
 found   : C.super.q.type (with underlying type M2)
 required: C.this.q.type
  x3 = x2  // fail
       ^
t7834neg.scala:69: error: type mismatch;
 found   : C.super.q.type (with underlying type M2)
 required: C.super.q.type
  x1 = super[S2].q  // fail
                 ^
t7834neg.scala:71: error: type mismatch;
 found   : C.super.q.type (with underlying type M1)
 required: C.super.q.type
  x2 = super[S1].q  // fail
                 ^
t7834neg.scala:74: error: type mismatch;
 found   : C.super.q.type (with underlying type M1)
 required: C.this.q.type
  x3 = super[S1].q  // fail
                 ^
t7834neg.scala:75: error: type mismatch;
 found   : C.super.q.type (with underlying type M2)
 required: C.this.q.type
  x3 = super[S2].q  // fail
                 ^
8 errors found