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Concurrent Modification Exception in ScopeManager

See original GitHub issue

Hey, Im encountering a Concurrent Modification Exception caused by the ScopeManager if I get this right:

Caused by: java.util.ConcurrentModificationException
        at java.util.IdentityHashMap$IdentityHashMapIterator.nextIndex(IdentityHashMap.java:735) ~[?:?]
        at java.util.IdentityHashMap$EntryIterator.next(IdentityHashMap.java:843) ~[?:?]
        at java.util.IdentityHashMap$EntryIterator.next(IdentityHashMap.java:837) ~[?:?]
        at java.util.IdentityHashMap.putAll(IdentityHashMap.java:506) ~[?:?]
        at de.fraunhofer.aisec.cpg.passes.scopes.ScopeManager.mergeFrom(ScopeManager.kt:183) ~[cpg-core-master-SNAPSHOT.jar:?]
        at de.fraunhofer.aisec.cpg.TranslationManager.parseParallel(TranslationManager.kt:265) ~[cpg-core-master-SNAPSHOT.jar:?]
        at de.fraunhofer.aisec.cpg.TranslationManager.runFrontends(TranslationManager.kt:202) ~[cpg-core-master-SNAPSHOT.jar:?]
        at de.fraunhofer.aisec.cpg.TranslationManager.analyze$lambda-2(TranslationManager.kt:86) ~[cpg-core-master-SNAPSHOT.jar:?]
        at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1700) ~[?:?]
        at java.util.concurrent.CompletableFuture$AsyncSupply.exec(CompletableFuture.java:1692) ~[?:?]
        at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290) ~[?:?]
        at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020) ~[?:?]
        at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656) ~[?:?]
        at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594) ~[?:?]
        at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177) ~[?:?]

And here another related stack trace:

Caused by: java.util.ConcurrentModificationException
        at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1042) ~[?:?]
        at java.util.ArrayList$Itr.next(ArrayList.java:996) ~[?:?]
        at java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1047) ~[?:?]
        at de.fraunhofer.aisec.cpg.TranslationManager.runFrontends(TranslationManager.kt:415) ~[cpg-core-master-SNAPSHOT.jar:?]
        at de.fraunhofer.aisec.cpg.TranslationManager.analyze$lambda-2(TranslationManager.kt:86) ~[cpg-core-master-SNAPSHOT.jar:?]
        at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1700) ~[?:?]
        at java.util.concurrent.CompletableFuture$AsyncSupply.exec(CompletableFuture.java:1692) ~[?:?]
        at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290) ~[?:?]
        at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020) ~[?:?]
        at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656) ~[?:?]
        at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594) ~[?:?]
        at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177) ~[?:?]

Seems related to https://github.com/Fraunhofer-AISEC/cpg/issues/651 however this time, typeSystemActiveInFrontend is explicitly set to false .

Regards, Tom