fix compilation failure when trying to analyse non-trivial non-type strings as types

Cython/Compiler/ExprNodes.py

@@ -1182,7 +1182,11 @@ def _analyse_name_as_type(name, pos, env):
     hold_errors()
     from TreeFragment import TreeFragment
     pos = (pos[0], pos[1], pos[2]-7)
+    try:
         declaration = TreeFragment(u"sizeof(%s)" % name, name=pos[0].filename, initial_pos=pos)
+    except CompileError:
+        sizeof_node = None
+    else:
         sizeof_node = declaration.root.stats[0].expr
         sizeof_node = sizeof_node.analyse_types(env)
     release_errors(ignore=True)

tests/run/cython3.pyx

@@ -437,7 +437,7 @@ def int_literals():
     print(cython.typeof(1UL))
     print(cython.typeof(10000000000000UL))
 
-def annotation_syntax(a : "test", b : "other" = 2) -> "ret":
+def annotation_syntax(a : "test new test", b : "other" = 2) -> "ret":
     """
     >>> annotation_syntax(1)
     3