[java] PrematureDeclaration false positive for unused variables

[adangel]

Affects PMD Version: 6.33.0

Rule: PrematureDeclaration

Description:

Don't report variables that are not used at all. Those should be left to UnusedLocalVariable.

Code Sample demonstrating the issue:

public String wrongEscapeSequences() 
    {
        final String r1 = "\u0008"; // unused var - not a premature declaration
        return "\u000csssdfsd";
    }

(from https://github.com/checkstyle/checkstyle/blob/checkstyle-8.10/src/it/resources/com/google/checkstyle/test/chapter2filebasic/rule232specialescape/InputIllegalTokenText.java#L17)

Expected outcome:

• Does PMD report a violation, where there shouldn't be one? -> false-positive

[adangel]

This has been fixed with PMD 7.0.0-rc1.