(In reply to Arthur K. [He/Him] from comment #4) > (In reply to Andrei Hajdukewycz [:sancus] from comment #3) > I agree that this seems like outlier user behavior that shouldn't be supported. What, in a related situation or built into TB, is considered within scope / supported behavior if a user were to try to rebuild? In bug 1780549 I suggested greying out the Repair Folder button while offline, I think that's probably the way to go, at least for IMAP. There are a lot of ways to shoot yourself in the foot by trying to repair even just the index without access to the server. For example, there is no guarantee that an offline IMAP folder has all mails downloaded.
Bug 1780551 Comment 5 Edit History
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(In reply to Arthur K. [He/Him] from comment #4) > (In reply to Andrei Hajdukewycz [:sancus] from comment #3) > I agree that this seems like outlier user behavior that shouldn't be supported. What, in a related situation or built into TB, is considered within scope / supported behavior if a user were to try to rebuild? In bug 1780549 I suggested greying out the Repair Folder button while offline, I think that's probably the way to go, at least for IMAP. There are a lot of ways to shoot yourself in the foot by trying to repair even just the index without access to the server. For example, there is no guarantee that an offline IMAP folder has all mails downloaded. I think it's reasonable to expect that, if you want to fix the state of an IMAP folder, you need access to the IMAP server which is the source of truth.