Listener RuntimeException silently swallowed by default in ChainedRepositoryListener/ChainedTransferListener

[elharo]

Affected version: HEAD

Files:

• maven-resolver-util/src/main/java/org/eclipse/aether/util/listener/ChainedRepositoryListener.java:117
• maven-resolver-util/src/main/java/org/eclipse/aether/util/listener/ChainedTransferListener.java:118

@SuppressWarnings("EmptyMethod")
protected void handleError(...) {
    // default just swallows errors
}

All RuntimeExceptions thrown by any chained listener (NPEs, IndexOutOfBoundsException, etc.) are silently swallowed unless the user subclasses and overrides handleError. This makes listener bugs invisible.

Originally reported in #1944.