LibreMapping known bugs
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* cannot delete mappings
* cannot delete paints
* cannot remove points in meshes

On OS X
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QObject: shared QObject was deleted directly. The program is malformed and may crash.
mapmap(299,0x7fff79da0310) malloc: *** error for object 0x102229ce0: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug