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From: "fxue at os dot amperecomputing.com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/102214] New: ICE when compiling local class with -fno-weak
Date: Mon, 06 Sep 2021 09:23:55 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102214

            Bug ID: 102214
           Summary: ICE when compiling local class with -fno-weak
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: fxue at os dot amperecomputing.com
  Target Milestone: ---

Created attachment 51413
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D51413&action=3Dedit
testcase

Compiling attached testcase with option "-flto -O3 -fno-weak" will get:

during IPA pass: *free_lang_data=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20
ic.cpp:5:11: internal compiler error: in mangle_decl, at cp/mangle.c:4088=
=20=20=20=20=20=20=20
    5 |     class InnerParent {=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20
      |           ^~~~~~~~~~~=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20
0xbe3ef2 mangle_decl(tree_node*)=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20
        ../../gcc/cp/mangle.c:4088=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20
0x17b0ac4 decl_assembler_name(tree_node*)
        ../../gcc/tree.c:710
0x17bd358 assign_assembler_name_if_needed(tree_node*)
        ../../gcc/tree.c:6318
0x17bd471 free_lang_data_in_cgraph
        ../../gcc/tree.c:6366
0x17bd606 free_lang_data
        ../../gcc/tree.c:6411
0x17bd7ac execute
        ../../gcc/tree.c:6483=