The file-write fallback path now preserves content in the temporary file if an in-place overwrite fails after the target has been truncated, giving you a chance to recover data. The error message now points you to the temp file path.
Error text: "writeFileAndFlush: in-place fallback write failed; content preserved at temp path" / "writeFileSyncAndFlush: in-place fallback write failed; content preserved at temp path"
Evidence
Content-preservation fallback (search for "content preserved at temp path") — hfr() at line ~55659, aEt() at line ~55513
Strings lifted out of the shipped bundle, so the claim above can be checked against them.