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Subject: [Bug c++/113580] -Wunused-parameter in template imported from module
 causes segmentation fault
Date: Fri, 26 Jan 2024 22:29:31 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113580

--- Comment #1 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Nathaniel Shead <nshead@gcc.gnu.org>:

https://gcc.gnu.org/g:ec57d183d35412aa5e0bcd7a448ccb75a4e1eab7

commit r14-8462-gec57d183d35412aa5e0bcd7a448ccb75a4e1eab7
Author: Nathaniel Shead <nathanieloshead@gmail.com>
Date:   Fri Jan 26 16:55:52 2024 +1100

    c++: Stream additional fields for DECL_STRUCT_FUNCTION [PR113580]

    Currently the DECL_STRUCT_FUNCTION for a declaration is always
    reconstructed from scratch. This causes issues though, as some fields
    used by other parts of the compiler (in this case, specifically
    'function_{start,end}_locus') are then not correctly initialised. This
    patch makes sure that these fields are also read and written.

            PR c++/113580

    gcc/cp/ChangeLog:

            * module.cc (struct post_process_data): Create.
            (trees_in::post_decls): Use.
            (trees_in::post_process): Return entire vector at once.
            Change overload to take post_process_data instead of tree.
            (trees_out::write_function_def): Write needed flags from
            DECL_STRUCT_FUNCTION.
            (trees_in::read_function_def): Read them and pass to
            post_process.
            (module_state::read_cluster): Write flags into cfun.

    gcc/testsuite/ChangeLog:

            * g++.dg/modules/pr113580_a.C: New test.
            * g++.dg/modules/pr113580_b.C: New test.

    Signed-off-by: Nathaniel Shead <nathanieloshead@gmail.com>=