Handled all steps of "Adding PMD support for a new ANTLR grammar based language" except $. Generate your Parser did not succeed because combining lexer and parser grammars has issues.
Add official Kotlin ANTLR grammar files, copy and rename some more from Swift
Combine KotlinParser, KotlinLexer and UnicodeClasses and use Swift.g4 as example
Separate Kotlin.g4 for parser grammar and KotlinLexer.g4 for lexer grammar; and move PmdKotlinParser.java to the right place
Adding PMD support for a new ANTLR grammar based language - step 1-4
pmd-java:typeof gives wrong matches in plugin 3.2.6
The SWT error with no more handlers seems to be something else, it still happens...
After a while I get an SWT error in Eclipse because there are no more handles and...