dtourolle
00245f5760
The handler was stored in a member and never read. A node's exception was discarded at the node boundary and the only surviving evidence was a Closed event, which reports that a node stopped but not why — the difference between a diagnosis and a guess. StaticNetwork has always wired this; Network accepted the handler and silently dropped it, which is worse than not offering the setter, because the caller believes they have a listener. start() now delivers it to each node, exactly as StaticNetwork does. The type changes with it. It was void(name, exception_ptr), which cannot express the keep-running decision the node side needs — so it is now NodeErrorHandler, the same alias StaticNetwork uses. That is a breaking change in principle; in practice nothing in the tree called this setter, which is how it stayed dead long enough to be worth finding. Verified by the new case: the node throws, the handler receives the name and the exception, returns true, and the node goes on to process the next value. 148/148.