Regression: FTBFS: MKV
With current contribs:
../../modules/demux/mkv/matroska_segment_parse.cpp:257:5: error: variable
'MetaDataHandlers_tag' is used but not defined in this translation unit,
and cannot be defined in any other translation unit because its type does
not have linkage
MKV_SWITCH_CREATE( EbmlTypeDispatcher, MetaDataHandlers, MetaDataCapture )
^