Compiler crash on calling non-entry function.

Cython/Compiler/ExprNodes.py

@@ -2601,6 +2601,13 @@ class SimpleCallNode(CallNode):
             self.function.entry = entry
             self.function.type = entry.type
             func_type = self.function_type()
+        else:
+            func_type = self.function_type()
+            if not func_type.is_cfunction:
+                error(self.pos, "Calling non-function type '%s'" % func_type)
+                self.type = PyrexTypes.error_type
+                self.result_code = "<error>"
+                return
         # Check no. of args
         max_nargs = len(func_type.args)
         expected_nargs = max_nargs - func_type.optional_arg_count

tests/errors/e_callnonfunction.pyx

@@ -8,7 +8,13 @@ ctypedef struct s:    # FIXME: this might be worth an error ...
     int x
 s()
 
+cdef int x():
+    return 0
+
+x()()
+
 _ERRORS = u"""
 2:1: Calling non-function type 'int'
 5:1: Calling non-function type 'float'
+14:3: Calling non-function type 'int'
 """