New issue 2916: py3.6 variable annotation breaks ternary expression
https://bitbucket.org/pypy/pypy/issues/2916/py36-variable-annotation-breaks-ternary
Ryan Hileman:
`var: bool = True if False else False`
In python3.6, this sets `var` to `False`.
In pypy's py3.6 branch, it sets `var` to `(True, False, False)`. Seems like a
parsing or AST error.
pypy3:
```
2 0 LOAD_CONST 1 ((True, False, False))
2 STORE_FAST 0 (var)
4 LOAD_CONST 0 (None)
6 RETURN_VALUE
```
python3.7:
```
2 0 LOAD_CONST 1 (False)
2 POP_JUMP_IF_FALSE 8
4 LOAD_CONST 2 (True)
6 JUMP_FORWARD 2 (to 10)
>> 8 LOAD_CONST 1 (False)
>> 10 STORE_FAST 0 (var)
12 LOAD_CONST 0 (None)
14 RETURN_VALUE
```
Is this a bug in constant folding?
This works as expected:
```
var: bool
var = True if False else False
```
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