Index: Python/ceval.c
===================================================================
--- Python/ceval.c	(revision 68444)
+++ Python/ceval.c	(working copy)
@@ -2483,10 +2483,10 @@
 		/* Unwind stacks if a (pseudo) exception occurred */
 
 fast_block_end:
+		assert(why != WHY_YIELD);
 		while (why != WHY_NOT && f->f_iblock > 0) {
 			PyTryBlock *b = PyFrame_BlockPop(f);
 
-			assert(why != WHY_YIELD);
 			if (b->b_type == SETUP_LOOP && why == WHY_CONTINUE) {
 				/* For a continue inside a try block,
 				   don't pop the block for the loop. */