chore: Add some more context when an exception is caught (#1432)

Co-authored-by: richΛrd <info@richardramos.me>

libp2p/protocols/secure/secure.nim

@@ -110,8 +110,8 @@ proc handleConn(
           fut2 = sconn.join()
         try: # https://github.com/status-im/nim-chronos/issues/516
           discard await race(fut1, fut2)
-        except ValueError:
-          raiseAssert("Futures list is not empty")
+        except ValueError as e:
+          raiseAssert("Futures list is not empty: " & e.msg)
         # at least one join() completed, cancel pending one, if any
         if not fut1.finished:
           await fut1.cancelAndWait()
@@ -182,14 +182,14 @@ method readOnce*(
     except LPStreamEOFError as err:
       s.isEof = true
       await s.close()
-      raise err
+      raise newException(LPStreamEOFError, "Secure connection EOF: " & err.msg, err)
     except CancelledError as exc:
       raise exc
     except LPStreamError as err:
       debug "Error while reading message from secure connection, closing.",
         error = err.name, message = err.msg, connection = s
       await s.close()
-      raise err
+      raise newException(LPStreamError, "Secure connection read error: " & err.msg, err)
 
   var p = cast[ptr UncheckedArray[byte]](pbytes)
   return s.buf.consumeTo(toOpenArray(p, 0, nbytes - 1))