block with mods in mix of elem does not work

[qfox]

bem-xjst 5

http://goo.gl/ZcBS67

{ block: 'x', elem: 'y', mix: { block: 'b', elemMods: { m: 'v' } } }
// should produce: <div class="x__y b"></div>
// but produces: <div class="x__y b_m_v"></div>

{ block: 'x', elem: 'y', mix: { block: 'b', mods: { m: 'v' } } }
// should produce: <div class="x__y b_m_v"></div>
// but produces: <div class="x__y b"></div>

[miripiruni]

@zxqfox what bem-xjst version 5.0.0? In v5.1.0 I already fixed this bugs.