libstdc++/17: cout is not a real ostream; dynamic_cast SEGV's as a result

[pbd@op.net]

>Number:         17
>Category:       libstdc++
>Synopsis:       cout is not a real ostream; dynamic_cast SEGV's as a result
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Dec 03 17:57:00 PST 1999
>Closed-Date:
>Last-Modified:
>Originator:     pbd@op.net
>Release:        2.9.0
>Organization:
>Environment:
RedHat Linux, egcs 1.1.2
>Description:
because cout is not a real ostream, but a _fake_ostream,
dynamic_cast<ClassDerivedFromOstream *> will fail
when applied to a pointer or reference to cout.

given that "ostream cout" is apparently part of the
"standard library", not having cout actually be a
real ostream is not good. 

i think. :)
>How-To-Repeat:
compile this program: c++ -o k.k.cc
run it, watch it SEGV when attempting a dynamic cast
on the pointer to cout.
>Fix:
cout should be a real ostream, not a _fake_ostream.
>Release-Note:
>Audit-Trail:
>Unformatted:
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