Font with Bad CMap Format 4 Causes Exception

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Using SfntTool to subset font bl-norm.ttf
2. Get exception


Hi,
I was testing out using the sfnttool to subset a font, and I came across this 
error:

Exception in thread "main" java.lang.IndexOutOfBoundsException: Index attempted
to be read from is out of bounds: 100f5
        at com.google.typography.font.sfntly.data.ReadableFontData.readUByte(Unknown Source)
        at com.google.typography.font.sfntly.data.ReadableFontData.readUShort(Unknown Source)
        at com.google.typography.font.sfntly.table.core.CMapFormat4.retrieveGlyphId(Unknown Source)
        at com.google.typography.font.sfntly.table.core.CMapFormat4.glyphId(Unknown Source)
        at com.google.typography.font.tools.subsetter.RenumberingCMapTableSubsetter.computeMapping(Unknown Source)
        at com.google.typography.font.tools.subsetter.RenumberingCMapTableSubsetter.subset(Unknown Source)
        at com.google.typography.font.tools.subsetter.Subsetter.subset(Unknown Source)
        at com.google.typography.font.tools.sfnttool.SfntTool.subsetFontFile(Unknown Source)
        at com.google.typography.font.tools.sfnttool.SfntTool.main(Unknown Source)

I was wondering what could be causing this error? I have attached the font 
involved.

Original issue reported on code.google.com by [email protected] on 27 Aug 2012 at 5:43

Attachments:

• bl-norm.ttf