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The rotation interval was installed once when the banner mounted and never touched again, so a swipe, arrow or dot tap inherited whatever was left of the running countdown — swiping 5.5s into a 6s interval moved the banner on half a second later. The timer moves into heroRotation.ts as a small restartable object so it can be unit-tested, and every manual navigation path restarts it from that moment. Verified red-first: with restart() reverted to leave a running timer alone, the regression test fails. Release 0.9.1.
153 lines
10 KiB
Markdown
153 lines
10 KiB
Markdown
# Defect windows — which bugs were present when
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For each fixed defect, the releases it was actually present in. Companion to
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[CHANGELOG.md](../CHANGELOG.md), which says what changed; this says how long each
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fault had been shipping before it did.
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**"Present since"** is the first *release* containing the defective code, not the
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first release where a user could hit it — those differ, sometimes by months, and
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the gap is called out where it matters. **"How dated"** records the evidence, so a
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row can be re-checked or disputed:
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| Method | Meaning |
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|--------|---------|
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| `pickaxe` | `git log -S<token>` on the defective token — the commit that introduced the exact string, then the earliest tag containing it. Strongest evidence. |
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| `feature` | The defect is inseparable from a feature that landed whole (bad rung in a new algorithm, missing caller in new plumbing), dated to that feature's release. |
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| `absence` | The fix *adds* something that was never there. Dated to when the surrounding code was built, since there is no introducing commit to find. Weakest — treat as "no later than". |
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## Present since the first release
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Nine defects date to the initial proof of concept (v0.0.1, 2026-06-23) and shipped
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for between two weeks and seven weeks short of two months before anyone hit them.
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That is the dominant pattern here: not regressions, but original assumptions that
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went unexercised until a later feature leaned on them.
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| Defect | Present since | Fixed in | Shipped broken for | How dated |
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|---|---|---|---|---|
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| `AudioStreamIndex=0` pinned the video stream as the audio track (DR-140) | v0.0.1 | **v0.4.6** | ~7 weeks | pickaxe |
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| Download URL spelled `videoBitrate`, which Jellyfin does not bind (DR-123) | v0.0.1 | **v0.5.1** | ~7 weeks | pickaxe |
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| `pause_download` / `resume_download` were no-ops (DR-168) | v0.0.1 | **v0.5.3** | ~7.5 weeks | pickaxe |
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| `.part` sidecar named by `with_extension`, so no cleanup path matched it (DR-169) | v0.0.1 | **v0.5.3** | ~7.5 weeks | pickaxe |
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| `Range` sent on every retry regardless of the response (DR-170) | v0.0.1 | **v0.5.3** | ~7.5 weeks | pickaxe |
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| `/Items/Latest` requested with the default `GroupItems=false` | v0.0.1 | **v0.5.1** | ~7 weeks | pickaxe |
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| `SubtitleStreamIndex` omitted from PlaybackInfo, letting the server burn in (DR-176) | v0.0.1 | **v0.5.5** | ~8 weeks | pickaxe |
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| No `PlaySessionId`, and one hardcoded `DeviceId`, on every stream URL (DR-177) | v0.0.1 | **v0.5.5** | ~8 weeks | pickaxe |
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| `download_item` never recorded `media_type`; NULL read as `'audio'` (DR-135) | v0.0.1 | **v0.4.6** | ~7 weeks | pickaxe |
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| `download_album` read its track list from the local cache (DR-173) | v0.0.1 | **v0.5.5** | ~8 weeks | pickaxe |
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| Device profile carried no `MaxAudioChannels` (DR-141) | v0.0.1 | **v0.4.6** | ~7 weeks | absence |
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| Streaming ceiling fixed at 20 Mbps with no way to lower it (UR-074) | v0.0.1 | **v0.5.3** (as a feature) | ~7.5 weeks | pickaxe |
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| Hero banner auto-rotation never restarted after a manual swipe (DR-038) | v0.0.1 | **v0.9.1** | ~8.5 weeks | pickaxe |
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### Why they took so long to surface
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Four of these were **latent until a later feature exercised them**, which is why
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the fix lands so far from the cause:
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- The `videoBitrate` casing was harmless while every download was `original`. It
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became visible only once a quality picker existed to select against — and then
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produced no error, just a full-size file, because Jellyfin discards an unbound
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query key silently.
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- The unconditional `Range` header was inert for the same reason: `original` is
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the one rung served with a `Content-Length` and real byte-range support. It
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started corrupting files in **v0.5.1**, the moment the casing fix made
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transcoded downloads actually transcode. So the *code* dates to v0.0.1 and the
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*corruption* to v0.5.1 — a one-release window for the visible symptom.
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- The missing `PlaySessionId` only bites when a stream is re-opened for the same
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item. Nothing re-opened one until quality switching, transcoded seek and
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audio-track switching existed.
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- The omitted `SubtitleStreamIndex` only bites on sources whose own default
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subtitle track is image-based, since that is what forces the server from
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sidecar to burn-in.
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Two were **masked by soft failure**: the asset protocol being disabled (DR-134)
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was hidden by the thumbnail cache falling back to the server copy whenever the
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server was reachable, and `AudioStreamIndex=0` was hidden by servers that
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silently correct an out-of-range index — which is exactly why it was reported as
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"*some* videos have no audio" rather than as a bug in the client.
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## Introduced by a feature, fixed later
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| Defect | Present since | Fixed in | How dated |
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| Native-path resume position never applied (both layers assumed the other seeked) | v0.0.9/v0.0.10 | **v0.5.1** | feature (`PlayerAdapter` contract) |
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| `get_downloaded_items` matched "this library exists" rather than constraining the item to it (DR-167) | v0.0.17 | **v0.5.3** | feature (browsable downloaded library) |
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| `SCOPE_ITEM_TYPES` — the frontend/backend boundary leak (DR-063) | v0.0.17 | **v0.2.1** | pickaxe |
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| `check:boundary` anchored to the query site, blind to a named const (DR-094) | v0.0.17 | **v0.2.1** | feature (tripwire landed with the leak it missed) |
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| Coverage gate divided by hardcoded denominators, reporting 158% (DR-093) | v0.0.1 | **v0.2.1** | pickaxe |
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| Tap deferral raced the WebView's synthesized click (DR-092 → DR-098) | v0.1.5 | **v0.2.7** | feature (the deferral itself) |
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| Transport for webview media decided from `el.paused` in the DOM (DR-097) | v0.0.9/v0.0.10 | **v0.2.7** | feature (`Html5PlayerAdapter`) |
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| `pick_current_episode` rung 3 returned the first *gap*, not the furthest watched | v0.3.0 | **v0.5.1** | feature |
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| `mirror_user_data` mirrored `is_favorite` alone and returned early (DR-155) | v0.4.0 | **v0.5.1** | pickaxe |
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| Stop-report path never fed the sync queue that existed for it (DR-154) | v0.4.6 | **v0.5.1** | feature (queue + drain landed with no producer) |
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| Background-audio base applied in two display-only places (DR-159) | v0.2.9 | **v0.5.3** | pickaxe |
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| Positions reported as 0 before the first tick, and always 0 for webview media (DR-178/179/180) | v0.5.3 | **v0.5.5** | feature (DR-159's tick boundary) |
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| Length-less handoff transcode left to the player's own load-error retry, which can only restart it (DR-203) | v0.0.16 | **v0.8.2** | feature (the handoff's progressive-mp3 choice) |
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Three of these are worth separating out, because the defect is not a mistake in
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the code so much as **plumbing that was built and never connected**:
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- `repository_get_next_up_episodes` accepted a `series_id` from the day it was
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written, and no caller passed one until v0.3.0.
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- The sync queue and its drain were built, tested and running in v0.4.6 with
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neither of its two would-be producers ever called.
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- Both halves of the watched-state backend existed with no caller before v0.5.3.
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An automated check cannot see any of these — the code is present, tested and
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reachable in principle. Only tracing a requirement to a *call site* catches it.
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## Short windows (one release or less)
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| Defect | Present since | Fixed in | Note |
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| `experimentalNativeVideo` defaulted on, shipping audio with a blank screen (DR-161 → DR-172) | v0.5.3 | **v0.5.4** | One release. The decode path was fine; the compositing step never ran. |
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| Webview-shaped audio profile insufficient — server ignores a profile's audio codec (DR-149) | v0.4.7 | **v0.4.8** | The v0.4.7 fix for DR-148 was necessary and not sufficient. |
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| Android `versionCode` floor went stale (`minor*100` yielding less than the 5002 already in the field) | v0.5.0 | **v0.5.3** | Caught before a broken APK shipped; no released build was un-installable. |
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| Subtitle sidecar work reverted by a commit assembled from a stale tree | v0.5.5 | **v0.5.5** | Never released broken — both commits are in v0.5.5. |
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## Fixed twice / never actually broken
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- **Autoplay time reset (v0.0.2).** Two commit objects carry this identical
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change: `dcf08f30` (merged via Gitea PR #3, tagged v0.0.2) and `fa7cb6e9` (the
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local original). Both have the same parent `674c8e5c` and the same diff. A merge
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chain pulled `fa7cb6e9` and its follow-up `1e599627` into master's history
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during v0.5.5, so `git log v0.5.4..v0.5.5` lists an autoplay fix that changed no
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file in that release — `nextEpisodeService.ts` is byte-identical across the tag
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boundary. The fix shipped in **v0.0.2** and has not regressed.
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This is the one case where reading the changelog off `git log` subjects would
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have produced a false entry, and it is a good argument for the project's
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practice of deriving release notes from TRACES rather than commit subjects.
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## Recurring shapes
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Four causes account for most of the table:
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1. **An omitted parameter is not a neutral default.** `SubtitleStreamIndex`,
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`AudioStreamIndex`, `GroupItems` and `MaxAudioChannels` all had a server-side
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default that was actively wrong, and in three of the four the server's choice
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was more expensive than the one intended — burn-in forcing a full re-encode
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being the extreme case.
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2. **Silent binding failures.** `videoBitRate` produced no error, no warning and a
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plausible-looking file. So did an unbound `Range`, and so did the coverage gate
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dividing by a stale denominator.
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3. **Two layers each assuming the other acts.** Native resume (adapter recorded
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the position, backend never seeked), end-of-playback dispatch (two paths, one
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unreachable), and the surface/attach split in v0.5.0's native video.
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4. **A guard keyed on state that moves.** The tap deferral keyed suppression on a
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timer handle the callback had already cleared; the HTML5 toggle keyed
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play-vs-pause on `el.paused`, which flips while buffering.
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## Reproducing this
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The pickaxe rows can be re-derived directly:
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```bash
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git log --oneline --reverse -S'<defective token>' -- src-tauri/src # introducing commit
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git tag --contains <sha> | sort -V | head -1 # first release with it
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```
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Blaming the lines a fix removed (`git blame` at the fix's parent) is faster to run
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across many commits but was **not** used for the rows above: it reliably lands on
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whichever commit last touched the adjacent lines, which is usually not the commit
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that introduced the defect. It was used only to shortlist candidates.
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