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16 lines
459 B
16 lines
459 B
5 years ago
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This error type is reported in Java. It fires when an immutable collection is
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returned from a method whose type is mutable.
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```java
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public List<String> getSomeList() {
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ImmutableList<String> l = foo(...);
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return l;
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}
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```
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This can lead to a runtime error if users of `getSomeList` try to modify the
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list e.g. by adding elements.
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Action: you can change the return type to be immutable, or make a copy of the
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collection so that it can be modified.
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