[Bug 210798] devel/gdb: compile-loc2c.c's do_compile_dwarf_expr_to_c( . . . ) uses uoffset += . . . with uoffset uninitialized as of -r417989

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=210798

            Bug ID: 210798
           Summary: devel/gdb: compile-loc2c.c's
                    do_compile_dwarf_expr_to_c( . . . ) uses uoffset += .
                    . . with uoffset uninitialized as of -r417989
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: freebsd-ports-bugs at FreeBSD.org
          Reporter: markmi at dsl-only.net
                CC: luca.pizzamiglio at gmail.com
             Flags: maintainer-feedback?(luca.pizzamiglio at gmail.com)
                CC: luca.pizzamiglio at gmail.com

-r417989 context:

compile/compile-loc2c.c's do_compile_dwarf_expr_to_c (. . .) has (note
uoffset's initialization status):

  while (op_ptr < op_end)
    {
      enum dwarf_location_atom op = (enum dwarf_location_atom) *op_ptr;
      uint64_t uoffset, reg;
      int64_t offset;
. . . no assignments to uoffset . . .
      switch (op)
. . .
        case DW_OP_addr:
. . .
          if (op_ptr >= op_end || *op_ptr != DW_OP_GNU_push_tls_address)
            uoffset += dwarf2_per_cu_text_offset (per_cu);
          push (indent, stream, uoffset);
          break;

Note the "uoffset +=".

This was reported by the compiler during the build.

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