fix tracing the scanner

Cython/Compiler/Scanning.pxd

@@ -9,7 +9,7 @@ cdef initial_compile_time_env()
 
 cdef class Method:
     cdef object name
-    cdef object __name__
+    cdef readonly object __name__  # for tracing the scanner
 
 @cython.final
 cdef class CompileTimeScope:

tests/run/scanner_trace.srctree

+PYTHON setup.py build_ext --inplace
+
+######## setup.py ###########
+
+from distutils.core import setup
+from Cython.Build import cythonize
+
+import Cython.Compiler.Scanning
+
+Cython.Compiler.Scanning.trace_scanner = 1
+
+setup(
+    ext_modules = cythonize("*.pyx")
+)
+
+import simple
+assert simple.test() == 123
+
+
+######## simple.pyx ###########
+
+def test():
+    return 123