Remove the position_modifier from the parser.

jedi/evaluate/compiled/__init__.py

@@ -10,7 +10,7 @@ from functools import partial
 from jedi._compatibility import builtins as _builtins, unicode
 from jedi import debug
 from jedi.cache import underscore_memoization, memoize_method
-from jedi.parser.tree import Param, Base, Operator, zero_position_modifier
+from jedi.parser.tree import Param, Base, Operator
 from jedi.evaluate.helpers import FakeName
 from . import fake
 
@@ -89,7 +89,7 @@ class CompiledObject(Base):
         for p in tokens:
             parts = [FakeName(part) for part in p.strip().split('=')]
             if len(parts) > 1:
-                parts.insert(1, Operator(zero_position_modifier, '=', (0, 0)))
+                parts.insert(1, Operator('=', (0, 0)))
             params.append(Param(parts, self))
         return params
 

jedi/evaluate/compiled/fake.py

@@ -180,8 +180,8 @@ def _get_faked(module, obj, name=None):
         # contain it).
         doc = '"""%s"""' % obj.__doc__  # TODO need escapes.
         suite = result.children[-1]
-        string = pt.String(pt.zero_position_modifier, doc, (0, 0), '')
-        new_line = pt.Newline(pt.zero_position_modifier, '\n', (0, 0))
+        string = pt.String(doc, (0, 0), '')
+        new_line = pt.Newline('\n', (0, 0))
         docstr_node = pt.Node('simple_stmt', [string, new_line])
         suite.children.insert(1, docstr_node)
         return result

jedi/evaluate/compiled/mixed.py

@@ -80,6 +80,11 @@ class MixedName(compiled.CompiledName):
         # This means a start_pos that doesn't exist (compiled objects).
         return (0, 0)
 
+    @start_pos.setter
+    def start_pos(self, value):
+        # Ignore the __init__'s start_pos setter call.
+        pass
+
 
 class LazyMixedNamesDict(compiled.LazyNamesDict):
     name_class = MixedName