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setting ast to null on destructor to deal with #2350

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
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Nikolaj Bjorner 2019-06-21 16:40:11 +02:00
parent 333b32b0d2
commit 63a952f254
1 changed files with 2 additions and 1 deletions
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src/api/python/z3/z3.py
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@ -301,8 +301,9 @@ class AstRef(Z3PPObject):
Z3_inc_ref(self.ctx.ref(), self.as_ast()) Z3_inc_ref(self.ctx.ref(), self.as_ast())
def __del__(self): def __del__(self):
if self.ctx.ref() is not None: if self.ctx.ref() is not None and self.ast is not None:
Z3_dec_ref(self.ctx.ref(), self.as_ast()) Z3_dec_ref(self.ctx.ref(), self.as_ast())
self.ast = None
def __deepcopy__(self, memo={}): def __deepcopy__(self, memo={}):
return _to_ast_ref(self.ast, self.ctx) return _to_ast_ref(self.ast, self.ctx)