New issue 2181: RPython Generators don't deal with raising other exception kinds
https://bitbucket.org/pypy/pypy/issues/2181/rpython-generators-dont-deal-with-raising
Carl Friedrich Bolz:
This test fails:
```
def test_different_exception(self):
def h(c):
if c == 8:
raise ValueError
def g(c):
try:
h(c)
except Exception, e:
if isinstance(e, ValueError):
raise
raise StopIteration
yield c
def f(x):
try:
for x in g(x):
pass
except ValueError:
return -5
return 5
assert f(8) == -5
res = self.interpret(f, [8])
assert res == -5
```
because the flow space assumes that .next can only raise StopIteration.
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