Message11421

In Jython 2.7.1rc2, as well as 2.7.0 (so no regression):

$ ~/jython2.7.1rc2/bin/jython t-write-list.py
Traceback (most recent call last):
  File "t-write-list.py", line 3, in <module>
    f.write(lst)
java.lang.NullPointerException
	at org.python.google.common.base.CharMatcher.matchesAllOf(CharMatcher.java:635)
	at org.python.core.Py.newStringOrUnicode(Py.java:674)
	at org.python.core.Py.newStringOrUnicode(Py.java:659)
	at org.python.core.PyException.<init>(PyException.java:61)
	at org.python.core.Py.TypeError(Py.java:265)
	at org.python.core.PyFile.asWritable(PyFile.java:512)
	at org.python.core.PyFile.file_write(PyFile.java:450)
	at org.python.core.PyFile$file_write_exposer.__call__(Unknown Source)
	at org.python.core.PyObject.__call__(PyObject.java:484)
	at org.python.pycode._pyx0.f$0(t-write-list.py:3)
	at org.python.pycode._pyx0.call_function(t-write-list.py)
	at org.python.core.PyTableCode.call(PyTableCode.java:171)
	at org.python.core.PyCode.call(PyCode.java:18)
	at org.python.core.Py.runCode(Py.java:1615)
	at org.python.util.PythonInterpreter.execfile(PythonInterpreter.java:296)
	at org.python.util.jython.run(jython.java:362)
	at org.python.util.jython.main(jython.java:142)
java.lang.NullPointerException: java.lang.NullPointerException

In Python 2.7:

$ python t-write-list.py
Traceback (most recent call last):
  File "t-write-list.py", line 3, in <module>
    f.write(lst)
TypeError: must be string or buffer, not list

Note that if the object being written is not a built-in type, one will get the following error:

$ python t-write-obj.py
Traceback (most recent call last):
  File "t-write-obj.py", line 9, in <module>
    f.write(foo)
TypeError: must be convertible to a buffer, not Foo

Ideally we can get this fixed for 2.7.1, since it is an easily observed NPE, which we try to never see in Jython.