libgcj/2237: serialization doesn't throw exception on failure

[tromey@redhat.com]

>Number:         2237
>Category:       libgcj
>Synopsis:       serialization doesn't throw exception on failure
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Mar 08 17:36:01 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Tom Tromey
>Release:        unknown-1.0
>Organization:
>Environment:

>Description:
When reading a serialized stream we should
throw InvalidClassException if we don't recognize
the data.  As far as I can tell we never do this.
As an example see PR 1971.
(If you want to use that test case you'll have 
to back out the fix first.)
>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: