Index: Lib/test/test_scope.py
===================================================================
RCS file: /cvsroot/python/python/dist/src/Lib/test/test_scope.py,v
retrieving revision 1.27
diff -c -r1.27 test_scope.py
*** Lib/test/test_scope.py	23 Jul 2002 19:04:00 -0000	1.27
--- Lib/test/test_scope.py	6 Aug 2003 12:33:26 -0000
***************
*** 522,524 ****
--- 522,541 ----
      return g
  
  f(4)()
+ 
+ print "23. problems with erroneous input"
+ 
+ # python bug #784075 gives this example:
+ 
+ src="def g(a=None, b, c=lambda: None): g"
+ 
+ # which is obviously bogus code, but tickled an abort trap in the
+ # symbol table code
+ 
+ try:
+     exec src
+ except SyntaxError:
+     pass
+ else:
+     raise TestFailed("non-default argument following default "
+                      "argument didn't raise")
Index: Lib/test/output/test_scope
===================================================================
RCS file: /cvsroot/python/python/dist/src/Lib/test/output/test_scope,v
retrieving revision 1.12
diff -c -r1.12 test_scope
*** Lib/test/output/test_scope	20 Apr 2002 04:51:39 -0000	1.12
--- Lib/test/output/test_scope	6 Aug 2003 12:33:26 -0000
***************
*** 22,24 ****
--- 22,25 ----
  20. eval and exec with free variables
  21. list comprehension with local variables
  22. eval with free variables
+ 23. problems with erroneous input
Index: Python/compile.c
===================================================================
RCS file: /cvsroot/python/python/dist/src/Python/compile.c,v
retrieving revision 2.291
diff -c -r2.291 compile.c
*** Python/compile.c	15 Jul 2003 20:23:26 -0000	2.291
--- Python/compile.c	6 Aug 2003 12:33:27 -0000
***************
*** 3709,3718 ****
  			t = TYPE(CHILD(n, i));
  		}
  		else {
! 			/* Treat "(a=1, b)" as an error */
! 			if (ndefs)
! 				com_error(c, PyExc_SyntaxError,
! 			    "non-default argument follows default argument");
  		}
  		if (t != COMMA)
  			break;
--- 3709,3717 ----
  			t = TYPE(CHILD(n, i));
  		}
  		else {
! 			/* we check for non-default argument following default
! 			   argument in the symtable phase now */
! 			assert(ndefs == 0);
  		}
  		if (t != COMMA)
  			break;
***************
*** 5461,5466 ****
--- 5460,5466 ----
  {
  	node *c;
  	int i;
+ 	int ndefs = 0;
  
  	if (TYPE(n) == parameters) {
  		n = CHILD(n, 1);
***************
*** 5473,5480 ****
  		if (TYPE(c) == STAR || TYPE(c) == DOUBLESTAR) {
  			break;
  		}
! 		if (i > 0 && (TYPE(CHILD(n, i - 1)) == EQUAL))
! 			symtable_node(st, CHILD(n, i));
  	}
  }
  
--- 5473,5489 ----
  		if (TYPE(c) == STAR || TYPE(c) == DOUBLESTAR) {
  			break;
  		}
! 		if (i + 1 < NCH(n) && TYPE(CHILD(n, i + 1)) == EQUAL) {
! 			ndefs++;
! 			symtable_node(st, CHILD(n, i+2));
! 			i += 2;
! 		}
! 		else if (ndefs > 0) {
! 				PyErr_SetString(PyExc_SyntaxError,
! 			"non-default argument follows default argument");
! 				st->st_errors++;
! 				return;
! 		}
  	}
  }