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There is a newer version: 8.9.0.37768

Naming a method hashcode() or equal is either:

 A bug in the form of a typo. Overriding Object.hashCode() (note the camelCasing) or Object.equals (note the 's' on the end) was meant, and the application does not behave as expected.
 Done on purpose. The name however will confuse every other developer, who may not notice the naming difference, or who will think it is a bug.

In both cases, the method should be renamed.
Noncompliant Code Example

public int hashcode() { /* ... */ }  // Noncompliant

public boolean equal(Object obj) { /* ... */ }  // Noncompliant

Compliant Solution

@Override
public int hashCode() { /* ... */ }

public boolean equals(Object obj) { /* ... */ }