}
		if col := pos.RelCol(); col != test.col {
			t.Errorf("%s: got col = %d; want %d", test.src, col, test.col)
		}
	}
}

// Test that typical uses of UnpackListExpr don't allocate.
func TestUnpackListExprAllocs(t *testing.T) {
	var x Expr = NewName(Pos{}, "x")
	allocs := testing.AllocsPerRun(1000, func() {
		list := UnpackListExpr(x)
		if len(list) != 1 || list[0] != x {
			t.Fatalf("unexpected result")
		}