I have been playing again with CL recently and am doing some trivial web-scraping of an old internet forum. I don't use a REPL directly, but just have a bunch of code snippets in a lisp file that I tell my editor to evaluate (similar to Jupyter?). I haven't bothered doing any exception (condition) handling, and so this morning I found this in a new window:

   Condition USOCKET:TIMEOUT-ERROR was signalled.
      [Condition of type USOCKET:TIMEOUT-ERROR]

   Restarts:
    0: [RETRY-REQUEST] Retry the same request.
    1: [RETRY-INSECURE] Retry the same request without checking for SSL certificate validity.
    2: [RETRY] Retry SLIME interactive evaluation request.
    3: [*ABORT] Return to SLIME's top level.
    4: [ABORT] abort thread (#<THREAD tid=17291 "worker" RUNNING {1001088003}>)

plus the backtrace. This is in a loop that's already crawled a load of webpages and has some accumulated some state. I don't want a full redo (2), so I just press 0. The request succeeds this time and it continues as if nothing happened.