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From: "ppalka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/105178] [11 Regression] g++ incorrectly reports
 invalid use of incomplete type
Date: Wed, 06 Apr 2022 13:43:25 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105178

Patrick Palka <ppalka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |11.3
             Status|UNCONFIRMED                 |NEW
           Keywords|                            |rejects-valid
                 CC|                            |ppalka at gcc dot gnu.org
   Last reconfirmed|                            |2022-04-06
     Ever confirmed|0                           |1
            Summary|g++ incorrectly reports     |[11 Regression] g++
                   |invalid use of incomplete   |incorrectly reports invalid
                   |type                        |use of incomplete type
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=3D104242

--- Comment #2 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Confirmed, trunk and 11.2.0 accept the testcase.=20

This is likely caused by r11-9303-g853b9d54365372 and the same bug as PR104=
242
except reported against 11 instead of trunk.  I can confirm that backporting
r12-7708-g7a42b1fa1a090e to the 11 branch fixes the testcase there.=