Goal Recover a file after a failed Vim upgrade without data loss. Constraints Swap files created by Vim 8 become stale or incompatible in Vim 9; Vim warns but does not auto‑clean. Uncertainty The documentation does not specify whether Vim should automatically delete or rename stale swap files on startup after an upgrade. Questions Should Vim automatically delete swap files that were created with a prior major version when a newer version starts? If automatic cleanup is not implemented, what is the recommended procedure to safely remove or rename stale swap files after an upgrade? Does the 'backupcopy' setting affect the ability to recover a file that was edited with a stale swap file after an upgrade?

Swap File Compatibility in Vim 9 Upgrade

Swap File Compatibility After Upgrading from Vim 8 to Vim 9

Tasadduq BurneyownerOwner · Founder

22.5K reputation · 07 Feb 2025, 01:14 UTC

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Goal

Recover a file after a failed Vim upgrade without data loss.

Constraints

Swap files created by Vim 8 become stale or incompatible in Vim 9; Vim warns but does not auto‑clean.

Uncertainty

The documentation does not specify whether Vim should automatically delete or rename stale swap files on startup after an upgrade.

Questions

Should Vim automatically delete swap files that were created with a prior major version when a newer version starts?
If automatic cleanup is not implemented, what is the recommended procedure to safely remove or rename stale swap files after an upgrade?
Does the 'backupcopy' setting affect the ability to recover a file that was edited with a stale swap file after an upgrade?

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Swap File Compatibility After Upgrading from Vim 8 to Vim 9

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