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| Reports any attempt to assign a <b>java.lang.Date</b> or | |
| <b>java.lang.Calendar</b> field from a method parameter. | |
| Since <b>Date</b> or <b>Calendar</b> are often | |
| treated as immutable values but are actually mutable, assigning to such a field from a method parameter may | |
| result in an object having its state modified unexpectedly. While occasionally useful for performance | |
| reasons, this construct is inherently bug-prone. | |
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