[Bug tools/28725] New: eu-ar -x -N COUNT uses instance [COUNT+1] of name

[panxh_ran at 163 dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28725

            Bug ID: 28725
           Summary: eu-ar -x -N COUNT uses instance [COUNT+1] of name
           Product: elfutils
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: tools
          Assignee: unassigned at sourceware dot org
          Reporter: panxh_ran at 163 dot com
                CC: elfutils-devel at sourceware dot org
  Target Milestone: ---

Created attachment 13880
  --> https://sourceware.org/bugzilla/attachment.cgi?id=13880&action=edit
the result of eu-ar -x -N COUNT

eu-ar -x -N COUNT should use instance [COUNT] of name, 
but it uses instance [COUNT+1] of name incorrectly.
Usage： -N  Use instance [COUNT] of name.

The attachments show the differences of command result between "eu-ar -x -N
COUNT"
and "ar -x -N COUNT".

do_oper_extract() in src/ar.c
Is it should be instance-- at Line522？
 522           if (res != NULL && (instance < 0 || instance-- == 0)
 523               && !found[(char **) res->data - argv])
 524             found[(char **) res->data - argv] = do_extract = true;
 525         }

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