我正在尝试建立ReqM2分析，并且某些与Graphviz相关的测试用例失败了

14:50:53     # 
14:50:53     # (dot.exe:45844): Pango-WARNING **: All font fallbacks failed!!!!
14:50:53     # 
14:50:53     # (dot.exe:45844): Pango-WARNING **: All font fallbacks failed!!!!
14:50:53     # 
14:50:53     # (dot.exe:45844): Pango-WARNING **: All font fallbacks failed!!!!
14:50:53     # 
14:50:53     # (dot.exe:45844): Pango-WARNING **: All font fallbacks failed!!!!
14:50:53     # 
14:50:53     # (dot.exe:45844): Pango-WARNING **: All font fallbacks failed!!!!
14:50:53     # 
14:50:53     # (dot.exe:45844): Pango-WARNING **: All font fallbacks failed!!!!
14:50:53     # '
14:50:53     #     expected: ''
14:50:58     # Looks like you failed 1 test of 9.
14:50:58 
14:50:58 #   Failed test '|* test/UnitTests/t/eb/ReqM_2/Exporter/Html5_t/001_da