Lib fails to read some ttf fonts

[gluck]

(which are then not accessible in FigmaLinux)

All msttcorefonts fail to be parsed in my environment:
(using font-reader/main.rs)

font-reader
Read '/usr/share/fonts/truetype/msttcorefonts/Arial.ttf' font error: Cannot read value of the head table param, id: 2, err: incomplete utf-8 byte sequence from index 8

While some other truetype fonts work properly:

font-reader
Font /usr/share/fonts/truetype/dejavu/DejaVuSerif.ttf
Font count: 1
 family: DejaVu Serif
 id: DejaVu Serif
 style: Book
 postscript: DejaVuSerif
 weight: 400
 stretch: 5
 italic: false

Font files seem valid, and can be read using ttf-parser crate (using font-info example):

font-info /usr/share/fonts/truetype/msttcorefonts/Arial.ttf                      
Family name: Some("Arial")
PostScript name: Some("ArialMT")
Units per EM: 2048
Ascender: 1854
Descender: -434
Line gap: 67
Global bbox: Rect { x_min: -1361, y_min: -665, x_max: 4154, y_max: 2124 }
Number of glyphs: 1320
Underline: Some(LineMetrics { position: -217, thickness: 150 })
X height: None    
Weight: Normal
Width: Normal
Regular: true
Italic: false
Bold: false           
Oblique: false
Strikeout: Some(LineMetrics { position: 530, thickness: 102 })
Subscript: Some(ScriptMetrics { x_size: 1434, y_size: 1331, x_offset: 0, y_offset: 283 })
Superscript: Some(ScriptMetrics { x_size: 1434, y_size: 1331, x_offset: 0, y_offset: 977 })
Variable: false 
OpenType substitution:
  Scripts:  
    arab
      No languages
  Features:
    init        
    medi    
    fina    
    liga    
Elapsed: 693us