The stack looked like this...
"Error #1125: The index 199 is out of range 198."
at org.as3commons.bytecode.io::AbstractAbcDeserializer/deserializeConstantPool()[C:\projects\as3-commons\as3-commons-bytecode\src\main\actionscript\org\as3commons\bytecode\io\AbstractAbcDeserializer.as:238]
at org.as3commons.bytecode.reflect::ReflectionDeserializer/readABCTag()[C:\projects\as3-commons\as3-commons-bytecode\src\main\actionscript\org\as3commons\bytecode\reflect\ReflectionDeserializer.as:93]
at org.as3commons.bytecode.reflect::ReflectionDeserializer/readTags()[C:\projects\as3-commons\as3-commons-bytecode\src\main\actionscript\org\as3commons\bytecode\reflect\ReflectionDeserializer.as:715]
at org.as3commons.bytecode.reflect::ReflectionDeserializer/read()[C:\projects\as3-commons\as3-commons-bytecode\src\main\actionscript\org\as3commons\bytecode\reflect\ReflectionDeserializer.as:84]
at org.as3commons.bytecode.reflect::ByteCodeTypeProvider/fromByteArray()[C:\projects\as3-commons\as3-commons-bytecode\src\main\actionscript\org\as3commons\bytecode\reflect\ByteCodeTypeProvider.as:131]
at org.as3commons.bytecode.reflect::ByteCodeTypeProvider/fromLoader()[C:\projects\as3-commons\as3-commons-bytecode\src\main\actionscript\org\as3commons\bytecode\reflect\ByteCodeTypeProvider.as:119]
at org.as3commons.bytecode.reflect::ByteCodeType$/fromLoader()[C:\projects\as3-commons\as3-commons-bytecode\src\main\actionscript\org\as3commons\bytecode\reflect\ByteCodeType.as:136]
... other upstream stuff...