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c48ef50b72
Remove sources of panic when laying out an iframe without a nested browsing context <!-- Please describe your changes on the following line: --> At the moment, layout panics if it discovers an iframe without a nested browsing context. Under normal circumstances, this is reasonable, but it requires very tight synchronization between script, layout, the constellation and the compositor. In particular, if a layout is in progress when an iframe's browsing context is discarded, this can trigger panic. This PR fixes this in two ways: 1. Making the pipeline and browsing context ids optional in layout's representation of an iframe. 2. Shutting down layout before discarding a browsing context, rather than after. This is belt and braces. --- <!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: --> - [X] `./mach build -d` does not report any errors - [X] `./mach test-tidy` does not report any errors - [X] These changes fix #17482 and #18477 - [X] These changes do not require tests because the PR is fixing a panic caused by a race condition <!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.--> <!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. --> <!-- Reviewable:start --> --- This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/18514) <!-- Reviewable:end --> |
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| .. | ||
| animation.rs | ||
| block.rs | ||
| Cargo.toml | ||
| construct.rs | ||
| context.rs | ||
| data.rs | ||
| display_list_builder.rs | ||
| flex.rs | ||
| floats.rs | ||
| flow.rs | ||
| flow_list.rs | ||
| flow_ref.rs | ||
| fragment.rs | ||
| generated_content.rs | ||
| incremental.rs | ||
| inline.rs | ||
| layout_debug.rs | ||
| lib.rs | ||
| linked_list.rs | ||
| list_item.rs | ||
| model.rs | ||
| multicol.rs | ||
| opaque_node.rs | ||
| parallel.rs | ||
| persistent_list.rs | ||
| query.rs | ||
| sequential.rs | ||
| table.rs | ||
| table_caption.rs | ||
| table_cell.rs | ||
| table_colgroup.rs | ||
| table_row.rs | ||
| table_rowgroup.rs | ||
| table_wrapper.rs | ||
| text.rs | ||
| traversal.rs | ||
| webrender_helpers.rs | ||
| wrapper.rs | ||
