泰山JDK8获取(宋体,12)中文问号？宽度为0的问题

FileFontStrike.getGlyphAdvance(int, boolean) line: 705  
FileFontStrike.getGlyphAdvance(int) line: 693 
FileFontStrike.getCodePointAdvance(int) line: 812 
FontDesignMetrics.handleCharWidth(int) line: 417  
FontDesignMetrics.charWidthFloat(char) line: 447  
FontDesignMetrics.charWidth(char) line: 439

getCodePointAdvance()处，mapper.charToGlyph(cp)得到？的图元索引(66267)。
getGlyphAdvance()：
if (glyphCode >= INVISIBLE_GLYPHS) {
    return 0f;
}
INVISIBLE_GLYPHS=65534