http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50951
Bug #: 50951
Summary: state of subtract_with_carry_engine not saved
correctly to output stream
Classification: Unclassified
Product: gcc
Version: 4.6.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: dariom...@hotmail.com
the value of __x._M_p is not written to output stream __os by
operator<<(std::basic_ostream<_CharT, _Traits>& __os,const
subtract_with_carry_engine<_UIntType,__w,__s,__r>& __x)
in 4.6.1/include/c++/bits/random.tcc.
Consequently, the state of the random engine is not fully restored by the
corresponding operator>>.
One way to fix the problem is to write __x._M_p to output stream __os.
Alternatively, the contents of the ring buffer could be saved and restored
always beginning at index __x._M_p, whatever its value, and then wrapping
around the ring buffer as necessary.
