Fix master incompatibilities after rebase

Cython/Compiler/Buffer.py

@@ -86,7 +86,7 @@ class IntroduceBufferAuxiliaryVars(CythonTransform):
             # Declare auxiliary vars
             def decvar(type, prefix):
                 cname = scope.mangle(prefix, name)
-                aux_var = scope.declare_var(name="$%s" % cname, cname=cname,
+                aux_var = scope.declare_var(name=None, cname=cname,
                                             type=type, pos=node.pos)
                 if entry.is_arg:
                     aux_var.used = True # otherwise, NameNode will mark whether it is used
@@ -771,4 +771,4 @@ acquire_utility_code = load_buffer_utility("BufferFormatCheck",
 
 # See utility code BufferFormatFromTypeInfo
 _typeinfo_to_format_code = load_buffer_utility(
-        "TypeInfoToFormat", context={}, requires=[buffer_structs_code])
+        "TypeInfoToFormat", context={}, requires=[buffer_structs_code])
\ No newline at end of file

Cython/Compiler/Nodes.py

@@ -2828,6 +2828,9 @@ class DefNode(FuncDefNode):
                     "%s = %s;" % (
                         arg.entry.cname,
                         arg.calculate_default_value_code(code)))
+                if arg.entry.type.is_memoryviewslice:
+                    code.put_incref_memoryviewslice(arg.entry.cname,
+                                                    have_gil=True)
                 code.putln('}')
 
         code.putln('}')

Cython/Compiler/PyrexTypes.py

@@ -422,6 +422,7 @@ class MemoryViewSliceType(PyrexType):
                     visibility='extern')
 
             scope.parent_type = self
+            scope.directives = {}
 
             scope.declare_var('_data', c_char_ptr_type, None,
                               cname='data', is_cdef=1)