py/vm: Fix bug with unwind jump popping the iterator from a for loop.

dpgeorge · dpgeorge · commit 04d05db27ec4 · 2017-05-25T20:39:08.000+10:00
This patch fixes a regression introduced by 088740e
diff --git a/py/vm.c b/py/vm.c
@@ -690,8 +690,7 @@ unwind_jump:;
                     }
                     ip = (const byte*)MP_OBJ_TO_PTR(POP()); // pop destination ip for jump
                     if (unum != 0) {
-                        // pop iter and iter_buf
-                        sp--;
+                        // pop the exhausted iterator
                         sp -= MP_OBJ_ITER_BUF_NSLOTS;
                     }
                     DISPATCH_WITH_PEND_EXC_CHECK();

Original file line number	Diff line number	Diff line change
`@@ -690,8 +690,7 @@ unwind_jump:;`
`690`	`690`	`}`
`691`	`691`	`ip = (const byte*)MP_OBJ_TO_PTR(POP()); // pop destination ip for jump`
`692`	`692`	`if (unum != 0) {`
`693`		`- // pop iter and iter_buf`
`694`		`- sp--;`
	`693`	`+ // pop the exhausted iterator`
`695`	`694`	`sp -= MP_OBJ_ITER_BUF_NSLOTS;`
`696`	`695`	`}`
`697`	`696`	`DISPATCH_WITH_PEND_EXC_CHECK();`