[cairo-bugs] [Bug 4192] New: _cairo_ft_unscaled_font_fini does not decrement font_map->num_open_faces

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https://bugs.freedesktop.org/show_bug.cgi?id=4192          
     
           Summary: _cairo_ft_unscaled_font_fini does not decrement
                    font_map->num_open_faces
           Product: cairo
           Version: cvs
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ft font backend
        AssignedTo: otaylor at redhat.com
        ReportedBy: cworth at cworth.org
         QAContact: cairo-bugs at cairographics.org


There's a logic bug in the handling of font_map->num_open_faces.

It should get decremented for every call to FT_Done_Face, but
_cairo_ft_unscaled_font_fini calls FT_Done_Face without decrementing
num_open_faces.

I think I introduced this bug with the hash rewrite. I also think an
assert statement in the cairo_debug_reset_static_data path should catch
it. I'll look into both detecting and fixing this bug.          
     
     
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