[Bug c++/105734] New: Regression: Incorrect "error: invalid use of 'auto'"

[llvm at rifkin dot dev via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105734

            Bug ID: 105734
           Summary: Regression: Incorrect "error: invalid use of 'auto'"
           Product: gcc
           Version: 12.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: llvm at rifkin dot dev
  Target Milestone: ---

The following code errors erroneously: https://godbolt.org/z/68vYYj8cc

A more minimal reproducible example is here: https://godbolt.org/z/f75Yx7K57.
Interestingly the error only manifests in conjunction with the explicit
destructor call.

This came up in conjunction with a library doing a lot of TMP shenanigans, I
will try to make a more minimal standalone reproducible example.