[Bug c++/89928] New: [8 Regression] errors out in c++17 mode

[doko at debian dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89928

            Bug ID: 89928
           Summary: [8 Regression] errors out in c++17 mode
           Product: gcc
           Version: 8.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: doko at debian dot org
  Target Milestone: ---

Created attachment 46074
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46074&action=edit
preprocessed source

[forwarded from https://bugs.debian.org/926234]

fails with r269936 on the gcc-8-branch, succeeds with the 8.3.0 release.

g++ -std=c++17 main.cpp

but works with

g++ -std=c++14 main.cpp

currently reducing ...