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From: "nov.ondrej at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/113292] New: [modules] internal error when compiling header
 to module containing static thread_local variable
Date: Tue, 09 Jan 2024 16:14:57 +0000
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X-Bugzilla-Version: 13.2.1
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113292

            Bug ID: 113292
           Summary: [modules] internal error when compiling header to
                    module containing static thread_local variable
           Product: gcc
           Version: 13.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: nov.ondrej at gmail dot com
  Target Milestone: ---

may be similar to #99187

you can also see here : https://godbolt.org/z/o4Kf8ed85

class test {
    static const test &get_instance() {
        return instance;
    }
    static thread_local test instance;
};


Compile with :-std=3Dc++20 -fmodules-ts -x c++-header

internal compiler error: in tree_node, at cp/module.cc:9264
0x263852c internal_error(char const*, ...)
        ???:0
0xa4edb5 fancy_abort(char const*, int, char const*)
        ???:0
0xbbf621 trees_out::core_vals(tree_node*)
        ???:0
0xbc1ef8 trees_out::tree_value(tree_node*)
        ???:0
0xbbea88 trees_out::tree_node(tree_node*)
        ???:0
...



The error appears, when function is reading static thread_local variable

Ondrej=