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RenderViewport max layout cycles should depend on number of slivers - #144104
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Should this be a little lower now that it is per child? Before a viewport with 3 sliver children would allow 10 passes, now it would be 30.
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I don't think any reasonable sliver would need more than a handful of passes, the problem is that you can have nested slivers in MultiSliver or even SliverMainAxisGroup (but I don't think that one properly propagates scrollOffsetCorrection?) and we have no good way to count correction count per actual source sliver. For that we would probably need changes to SliverGeometry.
So lowering the mainLayoutCycles could potentially be breaking change for someone that has nested slivers.
More importantly I do think that the check is meant to detect pathological cases where the layout is stuck in a loop of corrections, and as such it does matter if it is 10 passes or 30? It will throw an exception anyway so it is not something that happens during regular layout process.
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SGTM, thanks for explaining your thinking here. :)
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Is there an issue filed for SliverMainAxisGroup not handling the correction? We should follow up on that. :)
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@Piinks, seems like maybe you still need to approve the PR? :) I'll create issue for |
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Oh sorry about that! I had that happen a couple times last week. 🙃
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…lutter#144104) Fixesflutter#144102 ## Pre-launch Checklist - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [x] I signed the [CLA]. - [x] I listed at least one issue that this PR fixes in the description above. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] I added new tests to check the change I am making, or this PR is [test-exempt]. - [x] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-new channel on [Discord]. <!-- Links --> [Contributor Guide]: https://github.com/flutter/flutter/wiki/Tree-hygiene#overview [Tree Hygiene]: https://github.com/flutter/flutter/wiki/Tree-hygiene [test-exempt]: https://github.com/flutter/flutter/wiki/Tree-hygiene#tests [Flutter Style Guide]: https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo [Features we expect every widget to implement]: https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo#features-we-expect-every-widget-to-implement [CLA]: https://cla.developers.google.com/ [flutter/tests]: https://github.com/flutter/tests [breaking change policy]: https://github.com/flutter/flutter/wiki/Tree-hygiene#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/wiki/Chat [Data Driven Fixes]: https://github.com/flutter/flutter/wiki/Data-driven-Fixes
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Fixes#144102
Pre-launch Checklist
///).If you need help, consider asking for advice on the #hackers-new channel on Discord.