Ensure scopes of var_entries are recorded.

This fixes #1540.

Cython/Compiler/ExprNodes.py

@@ -6376,7 +6376,8 @@ class AttributeNode(ExprNode):
                         # as an ordinary function.
                         if entry.func_cname and not hasattr(entry.type, 'op_arg_struct'):
                             cname = entry.func_cname
-                            if entry.type.is_static_method or env.parent_scope.is_cpp_class_scope:
+                            if entry.type.is_static_method or (
+                                    env.parent_scope and env.parent_scope.is_cpp_class_scope):
                                 ctype = entry.type
                             elif type.is_cpp_class:
                                 error(self.pos, "%s not a static member of %s" % (entry.name, type))
@@ -6393,6 +6394,7 @@ class AttributeNode(ExprNode):
                         ubcm_entry.is_cfunction = 1
                         ubcm_entry.func_cname = entry.func_cname
                         ubcm_entry.is_unbound_cmethod = 1
+                        ubcm_entry.scope = entry.scope
                     return self.as_name_node(env, ubcm_entry, target=False)
             elif type.is_enum:
                 if self.attribute in type.values:

Cython/Compiler/Symtab.py

@@ -981,6 +981,7 @@ class BuiltinScope(Scope):
         var_entry.is_readonly = 1
         var_entry.is_builtin = 1
         var_entry.utility_code = utility_code
+        var_entry.scope = self
         if Options.cache_builtins:
             var_entry.is_const = True
         entry.as_variable = var_entry
@@ -1580,6 +1581,7 @@ class ModuleScope(Scope):
         var_entry.is_variable = 1
         var_entry.is_cglobal = 1
         var_entry.is_readonly = 1
+        var_entry.scope = entry.scope
         entry.as_variable = var_entry
 
     def is_cpp(self):
@@ -2122,6 +2124,7 @@ class CClassScope(ClassScope):
         var_entry.is_variable = 1
         var_entry.is_builtin = 1
         var_entry.utility_code = utility_code
+        var_entry.scope = entry.scope
         entry.as_variable = var_entry
         return entry
 

tests/run/static_methods.pyx

@@ -59,6 +59,13 @@ def call_static_cdef2(int x, int y):
     """
     return A.static_cdef2(&x, &y)
 
+def call_static_list_comprehension_GH1540(int x):
+    """
+    >>> call_static_list_comprehension_GH1540(5)
+    [('cdef', 5), ('cdef', 5), ('cdef', 5)]
+    """
+    return [A.static_cdef(&x) for _ in range(3)]
+
 # BROKEN
 #def call_static_cdef_untyped(a, b):
 #    """
@@ -67,6 +74,7 @@ def call_static_cdef2(int x, int y):
 #    """
 #    return A.static_cdef_untyped(a, b)
 
+# UNIMPLEMENTED
 # def call_static_cpdef(int x):
 #     """
 #     >>> call_static_cpdef(2)