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Subject: [Bug c++/105098] New: ICE: endless recursion during auto deduction
Date: Tue, 29 Mar 2022 14:59:21 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105098

            Bug ID: 105098
           Summary: ICE: endless recursion during auto deduction
           Product: gcc
           Version: 11.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: a3at.mail at gmail dot com
  Target Milestone: ---

Created attachment 52711
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D52711&action=3Dedit
original cpp code

While switching to libcxx from llvm-14 (actually llvm-13 fails too), using
tuple w/o explicitly passing types leads to ICE with gcc-11.2 (gcc-12 works
fine).

Note, that you can reproduce this with simple usage of tuple from libcxx 13=
+,
i.e.:

    # /usr/include/c++/v1 - path to libcxx
    g++ -std=3Dgnu++20 -c -o /dev/null -isystem /usr/include/c++/v1 -nostdi=
nc++
libcxx-tuple.cpp=