TypeError: attribute name must be string, not 'int'

[justintimecode]

Hello,

I randomly have the following error, when a python code called from lua raise an exception.

TypeError: attribute name must be string, not 'int'

  File "lupa/lua54.pyx", line 1031, in lupa.lua54._LuaObject.__getitem__
  File "lupa/lua54.pyx", line 1049, in lupa.lua54._LuaObject._getitem
  File "lupa/lua54.pyx", line 1944, in lupa.lua54.execute_lua_call
  File "lupa/lua54.pyx", line 413, in lupa.lua54.LuaRuntime.reraise_on_exception
  File "lupa/lua54.pyx", line 2254, in lupa.lua54.py_object_getindex_with_gil
  File "lupa/lua54.pyx", line 2230, in lupa.lua54.getattr_for_lua
TypeError: attribute name must be string, not 'int'

I think the error comes from reraise_on_exception when indexing exception object, it tries to access to elements 0, 1 and 2.

    @cython.final
    cdef int reraise_on_exception(self) except -1:
        if self._raised_exception is not None:
            exception = self._raised_exception
            self._raised_exception = None
            raise exception[0], exception[1], exception[2]
        return 0

I am investigating a fix as follows

    @cython.final
    cdef int reraise_on_exception(self) except -1:
        if self._raised_exception is not None:
            exception = self._raised_exception
            self._raised_exception = None
-           raise exception[0], exception[1], exception[2]
+          raise exception
        return 0

and

    @cython.final
    cdef int store_raised_exception(self, lua_State* L, bytes lua_error_msg) except -1:
        try:
 -          self._raised_exception = tuple(exc_info())
 -          py_to_lua(self, L, self._raised_exception[1])
+          self._raised_exception =  exc_info()[1]
+          py_to_lua(self, L, self._raised_exception)
        except:
            lua.lua_pushlstring(L, lua_error_msg, len(lua_error_msg))
            raise
        return 0

and change the typing:

-     cdef tuple _raised_exception
+    cdef Exception _raised_exception

[justintimecode]

Well, I made the change, and recompile lupa locally, and I still have the issue.
I don't understand how, in the stack trace, we move from line 413 to 2254

  File "lupa/lua54.pyx", line 413, in lupa.lua54.LuaRuntime.reraise_on_exception
  File "lupa/lua54.pyx", line 2254, in lupa.lua54.py_object_getindex_with_gil

Anyone have an idea how the raise of the exception leads to a call of py_object_getindex_with_gil function ?