py: Implement support for "except Exception as var" clause.

For this, needed to implement DELETE_NAME bytecode (because var bound
in except clause is automatically deleted at its end).
http://docs.python.org/3/reference/compound_stmts.html#except :
"When an exception has been assigned using as target, it is cleared at
the end of the except clause."

1 files changed, 5 insertions, 0 deletions

diff --git a/py/vm.c b/py/vm.c
index 48c4bdf04b..22243c403e 100644
--- a/py/vm.c
+++ b/py/vm.c
@@ -283,6 +283,11 @@ dispatch_loop:
                         sp -= 3;
                         break;
 
+                    case MP_BC_DELETE_NAME:
+                        DECODE_QSTR;
+                        rt_delete_name(qst);
+                        break;
+
                     case MP_BC_DUP_TOP:
                         obj1 = TOP();
                         PUSH(obj1);