[Bug libgcj/20508] New: gij prints too much information if an incorrect class is given

["mckinlay at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>]

When the name of a non-existant class is given to gij, the error given is far
too verbose:

$ gij Blah
Exception in thread "main" java.lang.NoClassDefFoundError: Blah
   at gnu.java.lang.MainThread.run (MainThread.java:98)
Caused by: java.lang.ClassNotFoundException: Blah not found in
gnu.gcj.runtime.SystemClassLoader{urls=[file:./],
parent=gnu.gcj.runtime.VMClassLoader{urls=[core:/], parent=null}}
   at java.net.URLClassLoader.findClass (URLClassLoader.java:923)
   at java.lang.ClassLoader.loadClass (ClassLoader.java:309)
   at java.lang.Class.forName (natClass.cc:88)
   at gnu.java.lang.MainThread.run (MainThread.java:94)

This is a lot more information than the user needs. Compare this with Sun's VM:

$ java Blah
Exception in thread "main" java.lang.NoClassDefFoundError: Blah

We should not wrap the ClassNotFoundException in MainThread.run, and the stack
trace code should supress stack trace printing when main() has not yet been
called (or, at least, for this special case - when the exception is thrown from
MainThread.run).

-- 
           Summary: gij prints too much information if an incorrect class is
                    given
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libgcj
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: mckinlay at redhat dot com
                CC: gcc-bugs at gcc dot gnu dot org,java-prs at gcc dot gnu
                    dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20508