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[Bug symtab/17236] New: bug in dwarf2_add_member_fn


https://sourceware.org/bugzilla/show_bug.cgi?id=17236

            Bug ID: 17236
           Summary: bug in dwarf2_add_member_fn
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: symtab
          Assignee: unassigned at sourceware dot org
          Reporter: tromey at redhat dot com

-Wunused-but-set-variable flags dwarf2read.c:

../../binutils-gdb/gdb/dwarf2read.c: In function âdwarf2_add_member_fnâ:
../../binutils-gdb/gdb/dwarf2read.c:12739:27: error: variable âblkâ set but not
used [-Werror=unused-but-set-variable]
        struct dwarf_block blk;
                           ^

The code:

          struct dwarf_block blk;
          int offset;

          offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref
            ? 1 : 2);
          blk.size = DW_BLOCK (attr)->size - offset;
          blk.data = DW_BLOCK (attr)->data + offset;
          fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu);

Probably that call to decode_locdesc should pass &blk as its
first argument.

Currently I imagine this branch is not taken due to
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44126

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