http://www.jboss.org/undertow-parent/undertow-core: Undertow (JBoss by Red Hat) 
public class io.undertow.util.MalformedMessageException extends java.io.IOException
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: io.undertow.util.MalformedMessageException
  super_class: java.io.IOException
{
  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.undertow.util.MalformedMessageException this
         0: .line 28
            aload 0 /* this */
            invokespecial java.io.IOException.<init>:()V
            return
        end local 0 // io.undertow.util.MalformedMessageException this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/undertow/util/MalformedMessageException;
}
SourceFile: "MalformedMessageException.java"