libstdc++/9761: filebuf::pbackfail discards previously put back characters

[paolo@gcc.gnu.org]

Synopsis: filebuf::pbackfail discards previously put back characters

State-Changed-From-To: open->analyzed
State-Changed-By: paolo
State-Changed-When: Sat Feb 22 16:24:01 2003
State-Changed-Why:
    Confirmed. Seems however a known issue: grep for 'pbacks' in
    std_streambuf.h

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9761