- Finally fixed the bug in compile() and exec where a string ending

with an indented code block but no newline would raise SyntaxError.
  This would have been a four-line change in parsetok.c...  Except
  codeop.py depends on this behavior, so a compilation flag had to be
  invented that causes the tokenizer to revert to the old behavior;
  this required extra changes to 2 .h files, 2 .c files, and 2 .py
  files.  (Fixes SF bug #501622.)

Include/pythonrun.h

@@ -10,6 +10,7 @@ extern "C" {
 #define PyCF_MASK (CO_FUTURE_DIVISION)
 #define PyCF_MASK_OBSOLETE (CO_GENERATOR_ALLOWED | CO_NESTED)
 #define PyCF_SOURCE_IS_UTF8  0x0100
+#define PyCF_DONT_IMPLY_DEDENT 0x0200
 
 typedef struct {
 	int cf_flags;  /* bitmask of CO_xxx flags relevant to future */