INRIA / INRIA/spoon

CtElement.getElements() may throw Exception in thread "main" java.lang.NullPointerException

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Java
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Description

The following code will trigger a runtime nullpointer exception:

```java
.......
CtElement ctElement = operation.getSrcNode();
List ifList = ctElement.getElements(new TypeFilter<>(CtIf.class)); // the buggy line
```

how to get around it? Thanks

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