[Bug fortran/118793] request NAMELIST reports of input errors indicate position of error and show line containing error

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118793

--- Comment #10 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jerry DeLisle <jvdelisle@gcc.gnu.org>:

https://gcc.gnu.org/g:523be91d54c05016ee09c2f7ffc74d35f56e48e5

commit r17-1907-g523be91d54c05016ee09c2f7ffc74d35f56e48e5
Author: Jerry DeLisle <jvdelisle@gcc.gnu.org>
Date:   Tue Jun 23 18:17:27 2026 -0700

    fortran: [PR118793] Provide expanded diagnostics for namelist read

    The change implements additional diagnostic information for namelist
    read. In particular, error messages provide line number, column
    position, the specific file name, and a portion of the input line
    where the error ocurred.

            PR libfortran/118793

    libgfortran/ChangeLog:

            * io/file_pos.c (st_rewind): Reset line and column numbers.
            * io/io.h: Add line and column number to the gfc_unit
            structure.
            * io/list_read.c (next_char_default): Increment the column
            position and line number as needed.
            (next_char_internal): Likewise.
            (next_char_utf8): Likewise.
            (nml_err_ret): Build the expanded diagnostic message.
            * io/unit.c (insert_unit): Initialize the line_number.

    gcc/testsuite/ChangeLog:

            * gfortran.dg/namelist_40.f90: Update expected dg-output.
            * gfortran.dg/namelist_47.f90: Likewise