Add changelog error for PR PyO3#532

pganssle · Jul 14, 2019 · e633ae2 · e633ae2
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -19,6 +19,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ### Changed
 
+ * Implementing the Using the `gc` parameter for `pyclass` (e.g. `#[pyclass(gc)]`) without implementing the `class::PyGCProtocol` trait is now a compile-time error. Failing to implement this trait could lead to segfaults. [#532](https://github.com/PyO3/pyo3/pull/532)
+
 ## [0.7.0] - 2018-05-26
 
 ### Added