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, 10 insertions, 0 deletions

diff --git a/tests/basics/try-as-var.py b/tests/basics/try-as-var.py
new file mode 100644
index 0000000000..0a92f1caee
--- /dev/null
+++ b/tests/basics/try-as-var.py
@@ -0,0 +1,10 @@
+try:
+    raise ValueError(534)
+except ValueError as e:
+    print(repr(e))
+
+# Var bound in except block is automatically deleted
+try:
+    e
+except NameError:
+    print("NameError")