pypy.module._io.test.apptest_io:test_telling

tempfile = 'D:\\SystemTemp\\pytest-of-matti\\pytest-1033\\test_telling0\\tempfile'

    def test_telling(tempfile):
        with _io.open(tempfile, "w+", encoding="utf8") as f:
            p0 = f.tell()
            f.write("\xff\n")
            p1 = f.tell()
            f.write("\xff\n")
            p2 = f.tell()
            f.seek(0)
            assert p0 == 0
>           assert p1 == 3
E           assert 4 == 3

..\build\pypy\module\_io\test\apptest_io.py:287: AssertionError

builder: pypy-c-jit-win-x86-64 build #2356

test: pypy/module/_io/test/apptest_io:test_telling