Unexpected error during class verification with ASM's Class Verifier (org.objectweb.asm.util.CheckClassAdapter)
===

So here is a snippet of bytecode which i am trying to verify using ASM's class Verifier:

    public <init>(Ljava/io/InputStream;)V
        ALOAD 0
        ALOAD 1
        SIPUSH 2048
        NEW org/apache/xerces/impl/msg/XMLMessageFormatter
        DUP
        INVOKESPECIAL org/apache/xerces/impl/msg/XMLMessageFormatter.<init> ()V
        INVOKESTATIC java/util/Locale.getDefault ()Ljava/util/Locale;
        INVOKESPECIAL org/apache/xerces/impl/io/UTF8Reader.<init> (Ljava/io/InputStream;ILorg/apache/xerces/util/MessageFormatter;Ljava/util/Locale;)V
        RETURN
        MAXSTACK = 5
        MAXLOCALS = 2

this is part of a larger class org/apache/xerces/impl/io/UTF8Reader. Now, when i run the the bytecode of this class through the Class verifier provided by ASM, I get the following results:

    org.objectweb.asm.tree.analysis.AnalyzerException: **Error at instruction 7: java.lang.ClassNotFoundException: org.apache.xerces.util.MessageFormatter**
    	at org.objectweb.asm.tree.analysis.Analyzer.analyze(Unknown Source)
    	at org.objectweb.asm.util.CheckClassAdapter.verify(Unknown Source)
    	at org.objectweb.asm.util.CheckClassAdapter.verify(Unknown Source)
    	at org.objectweb.asm.util.CheckClassAdapter.main(Unknown Source)
    Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: org.apache.xerces.util.MessageFormatter
    	at org.objectweb.asm.tree.analysis.SimpleVerifier.getClass(Unknown Source)
    	at org.objectweb.asm.tree.analysis.SimpleVerifier.isAssignableFrom(Unknown Source)
    	at org.objectweb.asm.tree.analysis.SimpleVerifier.isSubTypeOf(Unknown Source)
    	at org.objectweb.asm.tree.analysis.BasicVerifier.naryOperation(Unknown Source)
    	at org.objectweb.asm.tree.analysis.BasicVerifier.naryOperation(Unknown Source)
    	at org.objectweb.asm.tree.analysis.Frame.execute(Unknown Source)
    	... 4 more
    <init>(Ljava/io/InputStream;)V
    00000 UTF8Reader InputStream  :  :     ALOAD 0
    00001 UTF8Reader InputStream  : UTF8Reader  :     ALOAD 1
    00002 UTF8Reader InputStream  : UTF8Reader InputStream  :     SIPUSH 2048
    00003 UTF8Reader InputStream  : UTF8Reader InputStream I  :     NEW org/apache/xerces/impl/msg/XMLMessageFormatter
    00004 UTF8Reader InputStream  : UTF8Reader InputStream I XMLMessageFormatter  :     DUP
    00005 UTF8Reader InputStream  : UTF8Reader InputStream I XMLMessageFormatter XMLMessageFormatter  :     INVOKESPECIAL org/apache/xerces/impl/msg/XMLMessageFormatter.<init> ()V
    00006 UTF8Reader InputStream  : UTF8Reader InputStream I XMLMessageFormatter  :     INVOKESTATIC java/util/Locale.getDefault ()Ljava/util/Locale;
    00007 UTF8Reader InputStream  : UTF8Reader InputStream I XMLMessageFormatter Locale  :     INVOKESPECIAL org/apache/xerces/impl/io/UTF8Reader.<init> (Ljava/io/InputStream;ILorg/apache/xerces/util/MessageFormatter;Ljava/util/Locale;)V
    00008 ?        :     RETURN

I am highly confused by this last bit... why is it giving out a ClassNotFound exception for the org/apache/xerces/util/MessageFormatter object at line 7?

Thanks.