rlib/test/test_libffi.py::TestLibffiCall::()::test_by_ordinal

cls = <class 'rpython.rlib.test.test_libffi.TestLibffiCall'>

    @classmethod
    def setup_class(cls):
        from rpython.tool.udir import udir
        from rpython.translator.tool.cbuild import ExternalCompilationInfo
        from rpython.translator.platform import platform
    
        BaseFfiTest.setup_class()
        # prepare C code as an example, so we can load it and call
        # it via rlib.libffi
        c_file = udir.ensure("test_libffi", dir=1).join("foolib.c")
        # automatically collect the C source from the docstrings of the tests
        snippets = []
        for name in dir(cls):
            if name.startswith('test_'):
                meth = getattr(cls, name)
                # the heuristic to determine it it's really C code could be
                # improved: so far we just check that there is a '{' :-)
                if meth.__doc__ is not None and '{' in meth.__doc__:
                    snippets.append(meth.__doc__)
        #
        INCLUDE = '#include "src/precommondefs.h"\n'
        c_file.write(INCLUDE + str(py.code.Source('\n'.join(snippets))))
        eci = ExternalCompilationInfo(include_dirs=[cdir])
        cls.libfoo_name = str(platform.compile([c_file], eci, 'x',
                                               standalone=False))
>       cls.dll = cls.CDLL(cls.libfoo_name)

rlib\test\test_libffi.py:234: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
rlib\libffi.py:446: in __init__
    self.lib = dlopen(libname, mode)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

name = 'd:\\systemtemp\\pytest\\usession-main-810\\test_libffi\\x.dll'
mode = -1

    def dlopen(name, mode=-1):
        # mode is unused on windows, but a consistant signature
        if not name:
            raise DLOpenError("cannot use None")
        with rffi.scoped_utf82wcharp(name, codepoints_in_utf8(name)) as buf:
            res = rwin32.LoadLibraryW(buf)
        if not res:
            err = rwin32.GetLastError_saved()
            ustr, lgt = rwin32.FormatErrorW(err)
>           raise DLOpenError(ustr)
E           DLOpenError: 'Teseiidmdl ol o efud\xf2\xa0\x80\x8d\x00\xc6\xb8\xe2\x89\x94D\\yysufpp27v..8Srp'

rlib\rdynload.py:242: DLOpenError

builder: rpython-win-x86-64 build #399+

test: rlib/test/test_libffi.py::TestLibffiCall::()::test_by_ordinal