prevent the directive dicts from being shared among nodes and compilations

Cython/Compiler/Nodes.py

@@ -925,9 +925,11 @@ class CVarDefNode(StatNode):
     child_attrs = ["base_type", "declarators"]
 
     decorators = None
-    directive_locals = {}
+    directive_locals = None
 
     def analyse_declarations(self, env, dest_scope = None):
+        if self.directive_locals is None:
+            self.directive_locals = {}
         if not dest_scope:
             dest_scope = env
         self.dest_scope = dest_scope
@@ -962,7 +964,7 @@ class CVarDefNode(StatNode):
                     cname = cname, visibility = self.visibility, in_pxd = self.in_pxd,
                     api = self.api)
                 if entry is not None:
-                    entry.directive_locals = self.directive_locals
+                    entry.directive_locals = copy.copy(self.directive_locals)
             else:
                 if self.directive_locals:
                     error(self.pos, "Decorators can only be followed by functions")
@@ -1638,12 +1640,14 @@ class CFuncDefNode(FuncDefNode):
 
     inline_in_pxd = False
     decorators = None
-    directive_locals = {}
+    directive_locals = None
 
     def unqualified_name(self):
         return self.entry.name
 
     def analyse_declarations(self, env):
+        if self.directive_locals is None:
+            self.directive_locals = {}
         self.directive_locals.update(env.directives['locals'])
         base_type = self.base_type.analyse(env)
         # The 2 here is because we need both function and argument names.

Cython/Compiler/ParseTreeTransforms.py

@@ -584,7 +584,7 @@ class InterpretCompilerDirectives(CythonTransform, SkipDeclarations):
         super(InterpretCompilerDirectives, self).__init__(context)
         self.compilation_directive_defaults = {}
         for key, value in compilation_directive_defaults.items():
-            self.compilation_directive_defaults[unicode(key)] = value
+            self.compilation_directive_defaults[unicode(key)] = copy.deepcopy(value)
         self.cython_module_names = cython.set()
         self.directive_names = {}
 
@@ -604,8 +604,8 @@ class InterpretCompilerDirectives(CythonTransform, SkipDeclarations):
                 self.wrong_scope_error(node.pos, key, 'module')
                 del node.directive_comments[key]
 
-        directives = copy.copy(Options.directive_defaults)
-        directives.update(self.compilation_directive_defaults)
+        directives = copy.deepcopy(Options.directive_defaults)
+        directives.update(copy.deepcopy(self.compilation_directive_defaults))
         directives.update(node.directive_comments)
         self.directives = directives
         node.directives = directives