Commit 8758221e authored by Committed by GitHub
Fix frontend crash when deleting announcements (#13283)
This two-line change fixes a crash in the front end that occurred under the following circumstances: * A server had more than one announcement, * A user was displaying the announcements, and * An announcement was deleted (or unpublished, which amounts to the same thing.) As might be expected, the bug was caused by attempting to access a notification using an index value outside the bounds of the existing announcements. Specifically, in two places. First, `_markAnnouncementAsRead` attempts to modify announcements based on the current index. This is what caused the front end crash. Second, when rendering the `Announcements` component, the code paginates the announcements and displays the current one. This did not cause a crash, but caused the front end to confusingly display a blank announcement (in situations that would have caused a crash) with no way for the user to navigate back to previous announcements. This commit fixes both issues by adding a check to ensure that the code never attempts to access an announcement with an index greater than or equal to the number of announcements present.
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