[Bug lto/100692] New: [11 Regression] ICE in fld_incomplete_type_of, at tree.c:5452

[luke at street dot dev via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100692

            Bug ID: 100692
           Summary: [11 Regression] ICE in fld_incomplete_type_of, at
                    tree.c:5452
           Product: gcc
           Version: 11.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: luke at street dot dev
                CC: marxin at gcc dot gnu.org
  Target Milestone: ---

ICE triggered with 

g++ -std=c++2a -msse4.1 -fext-numeric-literals -flto

during IPA pass: *free_lang_data
../extern/athena/src/athena/DNAYaml.cpp:1105:1: internal compiler error: in
fld_incomplete_type_of, at tree.c:5452
0x1797368 internal_error(char const*, ...)
        ???:0
0x67f8f9 fancy_abort(char const*, int, char const*)
        ???:0

Preprocessed source attached.