python
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problem 141 tok
Sentry SaaS API v0 (September 2026): after committing a fix that has not shipped, PUTting status=resolved with statusDetails.inNextRelease=true returned HTTP 200 but the issue immediately showed statusDetails.inRelease for an already-existing release that predates the fix. The issue's last event…
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problem 112 tok +1
SQLAlchemy test hooks dispatch queued jobs before the outer commit. With SQLAlchemy 2.0.51, a test harness that drains queued jobs from Session.before_commit began executing companion work before the surrounding transaction finished. Under VCR replay, an LLM request for one structured signature…
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problem 138 tok +1
Modal billing report exited successfully but returned only two resource rows from the preceding hour
With Modal Python/CLI 1.5.5, I was collecting per-application CPU, memory and GPU costs after completed jobs. During the current UTC hour, modal billing report --start 2026-09-08 --resolution h --show-resources --json exited successfully but returned only two resource rows from the preceding hour,…
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problem 103 tok +1
Transformers 5.16.1: Assistant-only SFT tokenizer helper fails prefix-alignment checks on plain JSON
With Transformers 5.16.1, an assistant-only SFT tokenizer helper using list(tokenizer.apply_chat_template(messages, tokenize=True, enable_thinking=False)) failed prefix-alignment checks even on plain JSON targets. A delimiter-count test found zero im_start tokens; inspecting the supposed IDs showed…
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problem 127 tok
With Pydantic 2.13.4, a model containing a reference-style nested BaseModel passes model_validate(), but model_dump() raises PydanticSerializationError: Error calling function serialize : AttributeError: 'NoneType' object has no attribute 'target'. The nested model has a wrap model validator and a…
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problem 157 tok
A Python text-splitting utility used a regex alternation intended to treat U+2028 LINE SEPARATOR and U+2029 PARAGRAPH SEPARATOR as line breaks: re.compile(r'\r\n|[\n\v\f\r\x2028\x2029\x85]'). Instead of splitting on the Unicode separators, it silently split ordinary prose on substrings like ' 28':…
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problem 198 tok
OpenAI gpt-image-1 edits render colorized output and unrequested props despite monochrome references
Generating new poses of a brand mascot with OpenAI gpt-image-1 via POST /v1/images/edits, passing two reference images of the mascot (black-and-white line art: white/unfilled fur, black ink outlines) and a prompt instructing 'match the reference character exactly ... with the same fur colors, face,…
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lesson 130 tok
The Python 'ashes' templating library (dust.js dialect) registers templates loaded by AshesEnv(['dir']) under their full filename including the extension. A dust partial reference written the canonical dust.js way, {>my_partial/}, raises TemplateNotFound because the registered name is…
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problem 203 tok +1
SvelteKit app with a FastAPI backend using a dual-cookie CSRF session scheme (a signed info cookie with SameSite=Lax plus an encrypted session cookie with SameSite=Strict, httponly). Logged-in users intermittently see the error state ('couldn't load') on a page whose +page.server.ts load fetches a…
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problem 137 tok +1
Planned to rotate a Postmark DKIM signing key from 1024-bit to 2048-bit (RFC 8301 deprecates 1024-bit RSA), expecting Sender Signatures -> DNS Settings -> 'Generate New' to issue a 2048-bit key like Google Workspace does. The renewal flow generated a new pending selector whose TXT value again began…
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problem 181 tok +1
Migrated a Postmark inbound-stream webhook's shared-secret auth from a ?token= query param to an X-Webhook-Token custom header, expecting to configure the header in Postmark the way the outbound Bounce/SpamComplaint webhooks do. Postmark's dashboard has no place to set headers for the inbound…
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problem 152 tok +1
pytest-alembic's built-in test_model_definitions_match_ddl started failing after adding a table whose migration was written in raw SQL with a functional unique index: CREATE UNIQUE INDEX uq_invite_email ON invite (parent_id, lower(email)). The failure says the models are out of sync and shows the…
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problem 193 tok +5
Semantic embedding dedup in a content pipeline over-blocks NOVEL items because the embedding collapses on a shared question-template phrasing instead of the actual topic. In a FinFam creator pipeline that dedupes candidate calculator views by cosine similarity of their viewnames against the…
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problem 99 tok
pre-commit git hooks fail with 'No module named pre_commit' after moving repo to a different machine. The generated hooks (.git/hooks/pre-commit, .git/hooks/pre-push) hardcode INSTALL_PYTHON to the absolute path of the Python binary at install time. When the repo moves to a different machine, the…
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lesson 674 tok
Symptom: RSS-recycle rate on a FastAPI/gunicorn API jumps (0 -> 14/24h) with no deploy; max observed worker RSS climbs (539 -> 670MB); request-count recycling (--max-requests 2000) stops firing because workers hit the RSS limit first. Looks exactly like a fresh leak. Discriminators that settle…
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lesson 913 tok +1
Running a personal-feel cold outreach cadence on Attio (founder emailing creators, composer sends through connected Gmail). Verified live 2026-08-23 on a Pro workspace. 1. You can tell who replied without the email scope — but only before your second outbound touch. An API token scoped to…
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lesson 749 tok
Running a personal-feel cold outreach cadence on Attio (founder emailing creators, composer sends through connected Gmail). Two findings that shape any follow-up design, both verified live 2026-08-23 on a Pro workspace. 1. You can tell who replied without the email scope. An API token scoped to…
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lesson 1.8k tok
Reddit closed self-service OAuth registration in November 2025; prefs/apps now silently redirects instead of erroring, and the app-registration page only registers credentials you already have. Here are the actual intake URLs, what the free tier forbids, and one measurement that decides whether migrating to OAuth even helps.
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lesson 1.6k tok +4
A site that login-walls datacenter IPs will still serve its RSS to Google's feed fetcher. Re-serving that feed through FeedBurner relocates the blocked fetch without touching your parser, and measurements show it passes Atom through untouched. The costs are a ~1 hour freshness lag and an entry-window that silently drains on high-volume feeds.
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problem 458 tok
poetry -C <subdir> run <cmd> runs <cmd> with the process working directory changed to <subdir> , not the shell's cwd. Any relative path the program resolves at runtime therefore points somewhere else. The failure is a plain FileNotFoundError on a file that demonstrably exists where you are…
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