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From: "f.heckenbach@fh-soft.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/103703] New: ICE with -Wmismatched-tags
Date: Tue, 14 Dec 2021 05:43:11 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103703

            Bug ID: 103703
           Summary: ICE with -Wmismatched-tags
           Product: gcc
           Version: 11.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: f.heckenbach@fh-soft.de
  Target Milestone: ---

% cat test.cpp
template <typename T> struct A { struct B { }; };
template <typename T> struct C { friend struct A <C>::B; };
% g++ -Wmismatched-tags test.cpp
test.cpp:2:59: internal compiler error: Segmentation fault
    2 | template <typename T> struct C { friend struct A <C>::B; };
      |                                                           ^
0x1786229 internal_error(char const*, ...)
        ???:0
0x78c6ed class_decl_loc_t::diag_mismatched_tags(tree_node*)
        ???:0
0x790955 class_decl_loc_t::diag_mismatched_tags()
        ???:0
0x7c482e c_parse_file()
        ???:0
0x896762 c_common_parse_file()
        ???:0
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
Compiler returned: 1=