| 1 | #From hankedr@manatee.dms.auburn.edu Tue Oct 13 22:15:59 1998
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| 2 | #Return-Path: <hankedr@manatee.dms.auburn.edu>
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| 9 | # for <arnold@gnu.org>; Tue, 13 Oct 1998 10:25:32 -0400
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| 11 | # by manatee.dms.auburn.edu (8.9.1a/8.9.1) id JAA13348;
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| 12 | # Tue, 13 Oct 1998 09:22:29 -0500 (CDT)
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| 13 | #Date: Tue, 13 Oct 1998 09:22:29 -0500 (CDT)
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| 14 | #Message-Id: <199810131422.JAA13348@manatee.dms.auburn.edu>
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| 15 | #From: Darrel Hankerson <hankedr@dms.auburn.edu>
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| 16 | #To: arnold@gnu.org
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| 17 | #In-reply-to: <199810131313.QAA31784@alpha.netvision.net.il> (message from
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| 18 | # Aharon Robbins on Tue, 13 Oct 1998 16:10:36 +0200)
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| 19 | #Subject: Re: full text of bug report?
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| 20 | #Mime-Version: 1.0
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| 21 | #Content-Type: text/plain; charset=US-ASCII
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| 22 | #X-UIDL: bf3fce492dad4ab030c561e7b2f27d0a
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| 23 | #Status: RO
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| 24 | #
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| 25 | # Do you have the full text of the a = a "\n" f() bug report?
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| 26 | # I can't find it.... I'm not sure there really is a bug.
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| 27 | #
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| 28 | #Yes, see below.
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| 29 | #
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| 30 | #His example has unnecessary fragments (in particular, the use of
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| 31 | #gensub is irrelevant). As I wrote to you earlier, the interesting
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| 32 | #question for me is:
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| 33 | #
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| 34 | # Is the concatenation result undefined? If the result is defined or
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| 35 | # implementation-dependent, then gawk has a bug.
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| 36 | #
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| 37 | #
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| 38 | #=== Original report =====================================================
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| 39 | #From: Attila Torcsvari <arcdev@mail.matav.hu>
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| 40 | #To: "'bug-gnu-utils@prep.ai.mit.edu'" <bug-gnu-utils@gnu.org>
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| 41 | #Subject: gawk 3.0.3 bug
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| 42 | #Date: Thu, 17 Sep 1998 18:12:13 +0200
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| 43 | #MIME-Version: 1.0
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| 44 | #Content-Transfer-Encoding: 7bit
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| 45 | #Resent-From: bug-gnu-utils@gnu.org
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| 46 | #X-Mailing-List: <bug-gnu-utils@gnu.org> archive/latest/3396
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| 47 | #X-Loop: bug-gnu-utils@gnu.org
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| 48 | #Precedence: list
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| 49 | #Resent-Sender: bug-gnu-utils-request@gnu.org
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| 50 | #Content-Transfer-Encoding: 7bit
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| 51 | #Content-Type: text/plain; charset="us-ascii"
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| 52 | #Content-Length: 618
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| 53 | #
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| 54 | #Bug-gnuers,
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| 55 | #please pass it to the responsible.
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| 56 | #
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| 57 | #The following generates something interesting:
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| 58 | #
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| 59 | BEGIN{
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| 60 | a="aaaaa"
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| 61 | a=a a #10
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| 62 | a=a a #20
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| 63 | a=a a #40
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| 64 | a=a a #80
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| 65 | a=a a #160
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| 66 | a=a a # i.e. a is long enough
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| 67 |
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| 68 | a=a"\n"f() # this causes the trouble
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| 69 | print a # guess the result
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| 70 | }
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| 71 |
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| 72 | function f()
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| 73 | {
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| 74 | #print "a before: ", a
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| 75 | #a=gensub("a","123,","g",a) # 'a' will be just a bit longer (4 times, but still should fit: 4*160=640)
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| 76 | gsub(/a/, "123", a)
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| 77 | #print "a after: ", a
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| 78 | return "X"
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| 79 | }
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| 80 | #
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| 81 | #Possible reason:
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| 82 | #during f the a is modified,
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| 83 | #it can be even freed, because gensub modifies its size
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| 84 | #the printout contains trash.
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| 85 | #
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| 86 | #Used version: VC compiled WinNT 32 bit Intel.
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| 87 | #
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| 88 | #Regards,
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| 89 | #
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| 90 | #Attila Torcsvari
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| 91 | #Arcanum Development
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| 92 | #
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