#From dhw@gamgee.acad.emich.edu Sat Oct 31 22:54:07 1998 #Return-Path: #Received: from cssun.mathcs.emory.edu (cssun.mathcs.emory.edu [170.140.150.1]) # by amx.netvision.net.il (8.9.0.Beta5/8.8.6) with ESMTP id HAA08891 # for ; Sat, 31 Oct 1998 07:14:07 +0200 (IST) #Received: from mescaline.gnu.org (we-refuse-to-spy-on-our-users@mescaline.gnu.org [158.121.106.21]) by cssun.mathcs.emory.edu (8.7.5/8.6.9-940818.01cssun) with ESMTP id AAA14947 for ; Sat, 31 Oct 1998 00:14:32 -0500 (EST) #Received: from gamgee.acad.emich.edu (gamgee.acad.emich.edu [164.76.102.76]) # by mescaline.gnu.org (8.9.1a/8.9.1) with SMTP id AAA20645 # for ; Sat, 31 Oct 1998 00:17:54 -0500 #Received: by gamgee.acad.emich.edu (Smail3.1.29.1 #57) # id m0zZUKY-000IDSC; Sat, 31 Oct 98 00:16 CST #Message-Id: #Date: Sat, 31 Oct 98 00:16 CST #From: dhw@gamgee.acad.emich.edu (David H. West) #To: bug-gnu-utils@gnu.org #Subject: gawk 3.0.3 bug report #Cc: arnold@gnu.org #X-UIDL: 7474b825cff989adf38f13883d84fdd7 #Status: RO # #gawk version: 3.03 #System used: Linux, kernel 2.0.28, libc 5.4.33, AMD K5PR133 (i586 clone) #Remark: There seems to be at least one bug shown by the demo below. # There may also be a Dark Corner involving the value of NR in an # END block, a topic on which the info file is silent. In gawk # 3.0.3, NR often seems to have the least-surprise value in an # END block, but sometimes it doesn't - see example below. #Problem descr: the log below shows a case where: # a) (this may be a red herring) the output of the gawk script # is different depending on whether its input file is named on # the command line or catted to stdin, without any use of the # legitimate means which could produce this effect. # b) NR is clearly getting clobbered; I have tried to simplify # the 19-line script "awkerr1" below, but seemingly unrelated # changes, like shortening constant strings which appear only in # print statements, or removing unexecuted or irrelevant code, # cause the clobbering to go away. Some previous (larger) # versions of this code would clobber NR also when reading from # stdin, but I thought you'd prefer a shorter example :-). #Reproduce-By: using the gawk script "awkerr1", the contents of # which appear in the transcript below as the output of the # command "cat awkerr1". Comments following # were added # to the transcript later as explanation. #---------------------------------------------- Script started on Fri #Oct 30 20:04:16 1998 chipmunk:/ram0# ls -l a1 awkerr1 -rw-r--r-- 1 #root root 2 Oct 30 18:42 a1 -rwxr-xr-x 1 root root #389 Oct 30 19:54 awkerr1 chipmunk:/ram0# cat a1 #a1 contains #one printable char and a newline a chipmunk:/ram0# od -c xc a1 #0000000 0a61 # a \n #0000002 chipmunk:/ram0# cat a1 | awkerr1 #no surprises here #1 lines in 1 sec: 1 lines/sec; nlines=1 chipmunk:/ram0# awkerr1 a1 È #lines in 1 sec: 1 lines/sec; nlines=1 #?! first char is an uppercase #E-grave chipmunk:/ram0# awkerr1 a1 | od -N1 -xc 0000000 00c8 # 310 \0 #0000001 chipmunk:/ram0# cat awkerr1 #the apparent ^M's are not #actually in the file #!/usr/bin/awk -f function process(w) { if(w in ws) { printf " : found\n"; lc[p " " w]++; rc[w " " n]++; } } BEGIN { } /^/ {if(NR % 10 ==0)print "processing line " NR; process($1); nlines++; } END {p=w; w=n; n=""; if(w)process(w); t=1; print NR " lines in " t " sec: " NR+0 " lines/sec; nlines=" nlines; } #chipmunk:/ram0# exit Script done on Fri Oct 30 20:07:31 1998 #--------------------------------------------- # #-David West dhw@gamgee.acad.emich.edu #