fix: batch A - crash bugs, a leak, and startup/edge fragility

Seven confirmed defects from the code audit, each small and low-risk.

* ai_functions.get_random_cyclic_message: random.randint(0, len(CYCLIC_WORDS))
  is inclusive -> could return len -> IndexError. Now randrange(len) + guard on
  an empty CYCLIC_WORDS.
* librarian_commands.get_image_sadox: random.randrange(0, len(res)-1) never
  picked the last comic and raised ValueError('empty range') on a single file.
  Now randrange(len) + an empty-dir guard.
* ai_commands image generation: every DALL-E error branch replied but did not
  return, so control fell through to `if response:` with response unbound ->
  UnboundLocalError right after the friendly message. Each branch now returns;
  response is pre-initialised; and PermissionDeniedError no longer passes a
  (message, text) tuple as a single arg.
* search_bot DOI match: `item["DOI"] in data` was a substring test, so a DOI
  that is a prefix of a longer one (10.1/1 vs 10.1/12) produced a false 'exists'
  hit. Now matches the line's first whitespace token exactly, via an O(1) dict
  index built once per consumer (also removes the O(queried-DOIs) per-line scan
  - a real win for large databases).
* communication_subroutine.scan_incoming: matched records were never removed
  from awaiting_q, so it grew unbounded over uptime and a reused UUID could
  re-match a stale record. Matched records are now dropped after dispatch.
* communication_subroutine.id3: (resp.headers.get("icy-name") or "").title()
  guards against a stream that omits headers (was AttributeError on None,
  500-ing the /prepped_tracks "next" handler).
* betoniarka.scan_tracks: waits for the radio logs to exist instead of dying
  with FileNotFoundError on a fresh deploy (which silently killed the
  now-playing forwarder until a restart).

Verified: tests/unit/test_search_bot.py gains exact-match and trailing-metadata
cases; full unit job 43 passed. Remaining observations (image-gen stale
/home/pi fallback paths + dead FileNotFoundError-after-OSError branch; tailer
still vulnerable to mid-run log rotation; DOI-first-token assumption) noted for
follow-up - none are crashes on the normal path.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

ai_commands.py

@@ -427,6 +427,11 @@ class Events(commands.Cog):
                     return
                 message_content_lower = message_content_lower.replace("imaginuje sobie: ", "")
                 self.logger.debug("Wywolanie obrazka: %s", message_content_lower)
+                # Every error branch below must RETURN: otherwise control falls
+                # through to `if response:` with `response` unbound (the call
+                # raised) -> UnboundLocalError, crashing the handler right after
+                # the friendly message was already sent.
+                response = None
                 try:
                     response = await OPENAICLIENT.images.generate(
                         model="dall-e-3",
@@ -440,10 +445,12 @@ class Events(commands.Cog):
                     await discord_friendly_reply(
                         message, f"*Kondziu patrzy na terminal, czeka, czeka, czeka,.... Jeszcze chwile czeka Przypierdala w niego pięścią....* Nie mogę się połączyć z Openai spróbuj od nowa. *Na ekranie pojawia się*: {e}"
                     )
+                    return
                 except openai.APIConnectionError as e:
                     await discord_friendly_reply(
                         message, f"*Kondziu patrzy na terminal, chwile się zastanawia. Przypierdala w niego pięścią....* Nie mogę się połączyć z Openai. *Na ekranie pojawia się*: {e}"
                     )
+                    return
                 except openai.BadRequestError as e:
                     # Handle invalid request error, e.g. validate parameters or log
                     if message.author.nick:
@@ -461,27 +468,31 @@ class Events(commands.Cog):
                     await discord_friendly_reply(
                         message, f"Sorki, cenzura: {resp}. Jak chcesz to są kanały na nudle #sexy-foteczky i #kanal-do-fapania *Na ekranie pojawia się: {e}"
                     )
+                    return
                 except openai.AuthenticationError as e:
                     # Handle authentication error, e.g. check credentials or log
                     await discord_friendly_reply(
                         message, f"*Kondziu patrzy na terminal, chwile się zastanawia. Przypierdala w niego pięścią....* Wołaj szefa - coś się z hasłem zjebało. *Na terminalu pojawia się:* {e}"
                     )
+                    return
                 except openai.PermissionDeniedError as e:
                     # Handle permission error, e.g. check scope or log
+                    # (was accidentally passing a (message, text) TUPLE as one arg)
                     await discord_friendly_reply(
-                        (
-                            message, f"*Kondziu patrzy na terminal, chwile się zastanawia. Przypierdala w niego pięścią....* Wołaj szefa - coś się z uprawnieniami zjebało. *Na terminalu pojawia się:* {e}"
-                        )
+                        message, f"*Kondziu patrzy na terminal, chwile się zastanawia. Przypierdala w niego pięścią....* Wołaj szefa - coś się z uprawnieniami zjebało. *Na terminalu pojawia się:* {e}"
                     )
+                    return
                 except openai.RateLimitError as e:
                     await discord_friendly_reply(
                         message, f"*Kondziu patrzy na terminal* Wołaj szefa. Zapłacić rachunki za AI trzeba. Jak chcesz to się na #zebranie dorzuć. {e}"
                     )
+                    return
                 except openai.APIError as e:
                     # Handle API error, e.g. retry or log
                     await discord_friendly_reply(
                         message, f"*Kondziu nurkuje za bar, terminal wybucha. Przed tobą ląduje pergamin zapisany pięknym gotykiem a na nim*: {e}"
                     )
+                    return
                 if response:
                     self.logger.info(response)
                     image_url = response.data[0].url

ai_functions.py

@@ -541,10 +541,12 @@ async def get_random_cyclic_message(client):
     # trunk-ignore(bandit/B311)
     ai_check = random.randint(0, 10)
     logger.info("Losowa wypowiedź")
-    if ai_check < 2:
+    if ai_check < 2 and CYCLIC_WORDS:
         logger.info("Predefiniowana")
+        # randrange(n) is 0..n-1; randint(0, n) was inclusive and could return n
+        # -> list(...)[n] IndexError. Guarded on empty CYCLIC_WORDS above.
         # trunk-ignore(bandit/B311)
-        messnum = random.randint(0, len(CYCLIC_WORDS))
+        messnum = random.randrange(len(CYCLIC_WORDS))
         logger.debug(messnum)
         logger.debug(len(CYCLIC_WORDS))
         mess_key = list(CYCLIC_WORDS.keys())[messnum]

communication_subroutine.py

@@ -235,14 +235,20 @@ def scan_incoming(stop_event: Optional[threading.Event] = None):
         try:
             answer = incoming_q.get(block=False)
             logger.info("DATA FOUND")
-            record_stored = False
+            # Collect matched records and drop them from awaiting_q afterwards -
+            # they used to stay forever (awaiting_q only ever grew), leaking
+            # memory over the bot's uptime and letting a reused UUID re-match a
+            # stale record.
+            matched = []
             for record in awaiting_q:
                 if record.uuid in answer.keys():
-                    record_stored = True
                     record.stop = True
                     record.entries = answer[record.uuid]
                     IN_COMM_Q.put(record)
-            if not record_stored:
+                    matched.append(record)
+            for record in matched:
+                awaiting_q.remove(record)
+            if not matched:
                 for key in answer.keys():
                     record = QueryControl("Orphaned", key, "Orphan", None)
                     record.stop = True
@@ -270,10 +276,13 @@ def id3(url: str) -> dict:
         resp.read(
             metaint
         )  # this isn't seekable so, arbitrarily read to the point we want
+        # Guard the headers: an Icecast stream that omits icy-name / icy-genre
+        # (e.g. while the radio is down) made `.title()` raise AttributeError on
+        # None, 500-ing the /prepped_tracks "next" handler that calls this.
         tagdata = dict(
             site_url=resp.headers.get("icy-url"),
-            name=resp.headers.get("icy-name").title(),
-            genre=resp.headers.get("icy-genre").title(),
+            name=(resp.headers.get("icy-name") or "").title(),
+            genre=(resp.headers.get("icy-genre") or "").title(),
             title=get_stream_title(resp.read(255)),
         )
         return tagdata

conjurer_betoniarka/betoniarka.py

@@ -203,6 +203,12 @@ def wyszukaj(word_list, how_many, _logger=None, write_to=None):
 # ---------------------------------------------------------------- tailer
 def scan_tracks():
     """Tail the radio logs and forward play events to the bot."""
+    # On a fresh deploy Liquidsoap may not have written its logs yet; wait for
+    # them instead of dying with FileNotFoundError, which used to silently kill
+    # the now-playing forwarder until the container was restarted.
+    while not (RADIOLOG_PATH.exists() and PERSISTENCE_PATH.exists()):
+        logger.info("Waiting for radio logs (%s, %s)...", RADIOLOG_PATH, PERSISTENCE_PATH)
+        time.sleep(5)
     with open(RADIOLOG_PATH, "r", encoding=ENCODING) as log_file:
         log_file.seek(os.stat(RADIOLOG_PATH).st_size)
         prev_size = os.stat(PERSISTENCE_PATH).st_size

conjurer_librarian/search_bot.py

@@ -148,8 +148,11 @@ def consumer(in_q, control_q, doi, live_results, result_list, control_dict, expe
     print(f"Consumer thread started: {no} no")
     empty_counter = 0
     alive_no = 0
+    # DOI -> result item, so a line is matched with one O(1) dict lookup instead
+    # of scanning every queried DOI. Items are shared with result_list, so
+    # setting exists here is seen by everyone.
+    doi_index = {item["DOI"]: item for item in result_list}
     while True:
-        done_check = True
         try:
             data = in_q.get(block=True, timeout = 1)
             if data is _sentinel:
@@ -161,16 +164,21 @@ def consumer(in_q, control_q, doi, live_results, result_list, control_dict, expe
                 alive_no += 1
                 print(f"C{no}__{alive_no}\r", end="")
 
-                for item in result_list:
-                    if item["DOI"] in data and not item["exists"]:
-                        print(f"HIT in {no} content {data[0]} line {data[1]} file {data[2]} {item['exists']}")
-                        _logger.info(data)
-                        _logger.info("HIT")
-                        item["exists"] = True
-                        live_results.append(item)
-                    done_check = done_check and item["exists"]
-                if done_check:
-                    control_q.put(_sentinel)
+                # Each DB line is a DOI (optionally followed by metadata). Match
+                # the WHOLE first token exactly - the old `item["DOI"] in data`
+                # was a substring test, so a DOI that is a prefix of a longer one
+                # (10.1/1 vs 10.1/12) produced a false 'exists' hit.
+                parts = data.split()
+                line_doi = parts[0] if parts else ""
+                item = doi_index.get(line_doi)
+                if item is not None and not item["exists"]:
+                    print(f"HIT in {no}: {line_doi}")
+                    _logger.info("HIT %s", line_doi)
+                    item["exists"] = True
+                    live_results.append(item)
+                    # All found? Signal producers to stop early (rare -> cheap).
+                    if all(it["exists"] for it in result_list):
+                        control_q.put(_sentinel)
         except Empty:
             empty_counter += 1
             time.sleep(1)

librarian_commands.py

@@ -52,8 +52,13 @@ class DataModule(commands.Cog):
                 # check if current path is a file
                 if os.path.isfile(os.path.join(DIR_PATH_SADOX, path)):
                     res.append(path)
+            if not res:
+                await ctx.send("*Conjurer grzebie w pustej skrzyni* Nie ma dziś żadnych komiksów.")
+                return
+            # randrange(len) is 0..len-1; the old randrange(0, len-1) never picked
+            # the last file and raised ValueError('empty range') on a single file.
             # trunk-ignore(bandit/B311)
-            filename = res[random.randrange(0, len(res) - 1)]
+            filename = res[random.randrange(len(res))]
             # select random page
             file = open(DIR_PATH_SADOX + filename, "rb")
             if  True:

tests/unit/test_search_bot.py

@@ -94,6 +94,33 @@ def test_survives_invalid_utf8_byte_and_still_finds_later_doi(tmp_path, monkeypa
     assert hit, "DOI after the bad byte was not found - the file was aborted mid-read"
 
 
+def test_doi_match_is_exact_not_substring(tmp_path, monkeypatch):
+    # A DB line "10.1/12" must NOT satisfy a search for "10.1/1" (the old
+    # `doi in line` substring test did). The exact DOI must still be found.
+    monkeypatch.setattr(search_bot, "DATABASE_PATH", str(tmp_path) + "/")
+    (tmp_path / "0_chunk.txt").write_text(
+        "10.1/12\n10.1/1\n10.2/999\n", encoding="utf-8"
+    )
+
+    finished, result = _run_bounded([("10.1/1", "DATA"), ("10.9/absent", "DATA")])
+
+    assert finished
+    by_doi = {r["DOI"]: r["exists"] for r in result}
+    assert by_doi["10.1/1"] is True  # exact line present -> found
+    assert by_doi["10.9/absent"] is False
+
+
+def test_doi_match_handles_line_with_trailing_metadata(tmp_path, monkeypatch):
+    # Lines of the form "<DOI>\t<metadata>" still match on the first token.
+    monkeypatch.setattr(search_bot, "DATABASE_PATH", str(tmp_path) + "/")
+    (tmp_path / "0_chunk.txt").write_text("10.5/abc\tsome title here\n", encoding="utf-8")
+
+    finished, result = _run_bounded([("10.5/abc", "DATA")])
+
+    assert finished
+    assert result[0]["exists"] is True
+
+
 def test_discover_chunk_files_sorted_numerically(tmp_path, monkeypatch):
     monkeypatch.setattr(search_bot, "DATABASE_PATH", str(tmp_path) + "/")
     for n in (0, 2, 10, 1):