2003-07-01 Paolo Carlini <pcarlini@unitus.it>

2003-07-01  Paolo Carlini  <pcarlini@unitus.it>

	PR libstdc++/11389
	* include/bits/fstream.tcc (underflow): For encoding() == 0
	don't read more than __buflen chars.
	* testsuite/27_io/basic_filebuf/underflow/wchar_t/11389-1.cc: New.
	* testsuite/27_io/basic_filebuf/underflow/wchar_t/11389-2.cc: New.
	* testsuite/27_io/basic_filebuf/underflow/wchar_t/11389-3.cc: New.
	* testsuite/27_io/basic_filebuf/underflow/wchar_t/11389-4.cc: New.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@68780 138bc75d-0d04-0410-961f-82ee72b054a4