merged in latest cython-devel

diff --cc Cython/Compiler/ExprNodes.py
Simple merge

diff --cc Cython/Compiler/Optimize.py
Simple merge

diff --cc tests/bugs.txt
index 99586d8ecefcb4349d7c8b12fdc582c7bdcfebc2,8bf3560500cd9b9e11207c350c397cabf0dd5cfc..26608dafeeab67ca12e0f2c3c5298876c189d592
--- 1/tests/bugs.txt
--- 2/tests/bugs.txt
+++ b/tests/bugs.txt
@@@ -9,7 -9,8 +9,9 @@@ missing_baseclass_in_predecl_T26
  cfunc_call_tuple_args_T408
  cascaded_list_unpacking_T467
  compile.cpp_operators
+ cpp_templated_ctypedef
+ cpp_structs
 +genexpr_T491
  
  # CPython regression tests that don't current work:
  pyregr.test_threadsignals