Message9222

Issue #2234 reveals another example of "character smuggling" in the Jython str:
>>> from java.io import StringReader
>>> from org.python.core import PyFileReader
>>> r = StringReader(u"\u86c7\u541e\u8c61")
>>> pfr = PyFileReader(r)
>>> pfr.read(1)
'\u86c7'
>>> type(pfr.read(1))
<type 'str'>

The cost of scanning every character during construction of a PyString nags a bit, but catching this kind of error (which it does) appears worthwhile. A constructor from byte[] (or ByteBuffer), that needs no checking, would be handy when the client already has bytes, and is presumably the future.