fix carray assignments to char arrays and IndexNode

Cython/Compiler/ExprNodes.py

@@ -3884,24 +3884,23 @@ class SliceIndexNode(ExprNode):
             check_negative_indices(self.start, self.stop)
 
         base_type = self.base.type
-        if base_type.is_string or base_type.is_cpp_string:
+        if base_type.is_array and not getting:
+            # cannot assign directly to C array => try to assign by making a copy
+            if not self.start and not self.stop:
+                self.type = base_type
+            else:
+                self.type = PyrexTypes.CPtrType(base_type.base_type)
+        elif base_type.is_string or base_type.is_cpp_string:
             self.type = default_str_type(env)
         elif base_type.is_pyunicode_ptr:
             self.type = unicode_type
         elif base_type.is_ptr:
             self.type = base_type
         elif base_type.is_array:
-            if getting:
-                # we need a ptr type here instead of an array type, as
-                # array types can result in invalid type casts in the C
-                # code
-                self.type = PyrexTypes.CPtrType(base_type.base_type)
-            else:
-                # try to assign 'by value' (i.e. make a copy)
-                if not self.start and not self.stop:
-                    self.type = base_type
-                else:
-                    self.type = PyrexTypes.CPtrType(base_type.base_type)
+            # we need a ptr type here instead of an array type, as
+            # array types can result in invalid type casts in the C
+            # code
+            self.type = PyrexTypes.CPtrType(base_type.base_type)
         else:
             self.base = self.base.coerce_to_pyobject(env)
             self.type = py_object_type

Cython/Compiler/Nodes.py

@@ -4758,7 +4758,7 @@ class SingleAssignmentNode(AssignmentNode):
             self.lhs.is_memslice_scalar_assignment = True
             dtype = self.lhs.type.dtype
         elif self.lhs.type.is_array:
-            if not isinstance(self.lhs, (ExprNodes.IndexNode, ExprNodes.SliceIndexNode)):
+            if not isinstance(self.lhs, ExprNodes.SliceIndexNode):
                 # cannot assign to C array, only to its full slice
                 self.lhs = ExprNodes.SliceIndexNode(
                     self.lhs.pos, base=self.lhs, start=None, stop=None)

Cython/Utility/CConvert.pyx

@@ -18,7 +18,7 @@ cdef {{struct_name}} {{funcname}}(obj) except *:
         value = obj['{{member.name}}']
     except KeyError:
         raise ValueError("No value specified for struct attribute '{{member.name}}'")
-    result.{{member.cname}}{{'[:]' if member.type.is_array else ''}} = value
+    result.{{member.cname}} = value
     {{endfor}}
     return result