Technology/wms/dwm, (sdf.org), 01/18/2019
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User lro gave me a bit of hope around dwm, and I repaired it 
this morning by altering the utf8decodebyte() func in drw.c:

/* return (unsigned char)c & ~utfmask[*i]; */
return (unsigned char)c;

This was per a thread I picked up searching online. This 
does indeed solve the problem, at the expense of displaying 
certain characters in the bar (which I don't need/want.) 
It's not a proper fix, perhaps, but it works.... dwm is now 
"stable" again, with minimal effort.