When a patch introduces a new type that crosses a function/module
boundary (event, message, RPC frame, enum variant, etc.), the reviewer
must locate the dispatch point on the consuming side and confirm the
new type is handled. This class of bug is invisible from the diff alone
because the silent drop lives in untouched routing code.
Motivated by a missed P2 in PR #987: a new open_url extension_ui_request
was emitted by login() but RpcClient#handleLine had no case for it and
silently dropped every frame, leaving callers with no auth URL and the
command hanging until timeout.
Miroslav Drbal
8d1189f176