In normal "use whole disk" installs, the disk hasn't been overwritten yet when you get the warning. This situation is different.
However, if you install onto a blank disk, then the partman/confirm question includes the text:
WARNING: This will destroy all data on any partitions you have
removed as well as on the partitions that are going to be formatted.
I think the rest of this question is appropriate (it's asking you to confirm the automatic partitioning setup), but that the warning is not appropriate in the case of a blank disk or one that has just been wiped by partman-crypto. partman should omit this paragraph from partman/confirm in those cases.
In normal "use whole disk" installs, the disk hasn't been overwritten yet when you get the warning. This situation is different.
However, if you install onto a blank disk, then the partman/confirm question includes the text:
WARNING: This will destroy all data on any partitions you have
removed as well as on the partitions that are going to be formatted.
I think the rest of this question is appropriate (it's asking you to confirm the automatic partitioning setup), but that the warning is not appropriate in the case of a blank disk or one that has just been wiped by partman-crypto. partman should omit this paragraph from partman/confirm in those cases.