When an abstract rule is changed, all violations are reported as removed.

[UncleOwen]

pmd/pmd#6021

Why does the regressiontester still report that all violations are removed?

The stderr output from #6011 indicates that it tries to instantiate a rule that cannot be instantiated: https://pull-requests.pmd-code.org/pr-6011/35ce121bac4fee9b37c756b25f556653eb048a77/regression/openjdk-11/patch_stderr.txt

pmd-regression-tester/lib/pmdtester/builders/rule_set_builder.rb

Line 51 in 9373b6f

if filename.start_with?(PATH_TO_PMD_JAVA_BASED_RULES, PATH_TO_PMD_XPATH_BASED_RULES)

should distinguish between abstract and instantiable rules.

I guess a workaround would be to change a file in this branch that does not belong to the rules folder.

[adangel]

That's actually a duplicate of #124 .