[Bug libstdc++/20806] [3.4/4.0/4.1 Regression] basic_filebuf::xsgetn() fails with text mode and DOS line endings and large buffers

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|basic_filebuf::xsgetn()     |[3.4/4.0/4.1 Regression]
                   |fails with text mode and DOS|basic_filebuf::xsgetn()
                   |line endings and large      |fails with text mode and DOS
                   |buffers                     |line endings and large
                   |                            |buffers


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20806