GNU bug report logs - #15414
24.3; piping problems in eshell

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Joseph Mingrone <jrm <at> ftfl.ca>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.3; piping problems in eshell
Date: Wed, 18 Sep 2013 22:47:15 -0300

1. emacs -Q
2. M-x eshell
3. cat a_file | wc -l

The output of 3. will be wrong for most files longer than something like
40 lines and it will often give different results each time 3. is run.
No error messages are given.


In GNU Emacs 24.3.1 (i386-portbld-freebsd9.1, X toolkit)
 of 2013-08-08 on gly.ath.cx
Windowing system distributor `The X.Org Foundation', version 11.0.11204000
Configured using:
 `configure '--localstatedir=/var' '--without-rsvg'
 '--with-x-toolkit=athena' '--without-xaw3d'
 '--without-toolkit-scroll-bars' '--without-gif' '--with-xft'
 '--without-m17n-flt' '--with-otf' '--without-imagemagick'
 '--without-gsettings' '--without-gconf' '--with-xim' '--with-sound'
 '--without-dbus' '--with-xml2' '--with-gnutls'
 '--x-libraries=/usr/local/lib' '--x-includes=/usr/local/include'
 '--prefix=/usr/local' '--mandir=/usr/local/man'
 '--infodir=/usr/local/info/' '--build=i386-portbld-freebsd9.1'
 'build_alias=i386-portbld-freebsd9.1' 'CC=cc' 'CFLAGS=-O2 -pipe
 -fno-strict-aliasing' 'LDFLAGS= -L/usr/local/lib
 -Wl,-rpath=/usr/local/lib' 'CPPFLAGS=-I/usr/local/include' 'CPP=cpp''

Important settings:
  value of $LANG: en_CA.UTF-8
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: EShell

Minor modes in effect:
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  transient-mark-mode: t

Recent input:
M-x 
r e p o r t <tab> <return>

Recent messages:
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Checking 77 files in /usr/local/share/emacs/24.3/lisp/obsolete...
Checking 1 files in /usr/local/share/emacs/24.3/leim...
Checking for load-path shadows...done
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Wrote /tmp/docview1001/modified-lr-supplementary.pdf
Type C-c C-c to toggle between editing or viewing the document.
Mark all unread articles as read? (y or n)  y

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/home/jrm/.emacs.d/elpa/slime-20130626.1151/slime-autoloads hides /home/jrm/quicklisp/dists/quicklisp/software/slime-20130720-cvs/slime-autoloads

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multi-tty emacs)

Message #8 received at 15414 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Joseph Mingrone <jrm <at> ftfl.ca>
Cc: 15414 <at> debbugs.gnu.org
Subject: Re: bug#15414: 24.3; piping problems in eshell
Date: Wed, 18 Sep 2013 22:59:14 -0400

Joseph Mingrone wrote:

> 1. emacs -Q
> 2. M-x eshell
> 3. cat a_file | wc -l
>
> The output of 3. will be wrong for most files longer than something like
> 40 lines and it will often give different results each time 3. is run.

FWIW, I did not see this in 100 repetitions on a 100 line file, on
either of two systems. I got the correct answer every time.

I did notice that

  cat does-not-exist | wc -l 

returns 1 though.

Message #11 received at 15414 <at> debbugs.gnu.org (full text, mbox):

From: Joseph Mingrone <jrm <at> ftfl.ca>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 15414 <at> debbugs.gnu.org
Subject: Re: bug#15414: 24.3; piping problems in eshell
Date: Thu, 19 Sep 2013 12:04:00 -0300

Glenn Morris <rgm <at> gnu.org> writes:

> Joseph Mingrone wrote:
>
>> 1. emacs -Q
>> 2. M-x eshell
>> 3. cat a_file | wc -l
>>
>> The output of 3. will be wrong for most files longer than something like
>> 40 lines and it will often give different results each time 3. is run.
>
> FWIW, I did not see this in 100 repetitions on a 100 line file, on
> either of two systems. I got the correct answer every time.
>
> I did notice that
>
>   cat does-not-exist | wc -l 
>
> returns 1 though.

Were either of those systems running FreeBSD?

~ $ uname -a
Linux node8 3.5.0-27-generic #46~precise1-Ubuntu SMP Tue Mar 26 19:33:21
UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
$ wc -l q08-02a.qzp
82 q08-02a.qzp
~ $ cat q08-02a.qzp | wc -l
82


$ uname -a
FreeBSD phe 9.1-STABLE FreeBSD 9.1-STABLE #0 r247012: Tue Feb 19 21:45:31 AST 2013     root <at> phe.ath.cx:/usr/obj/usr/src/sys/PHE  amd64
$ wc -l q08-02a.qzp 
      82 q08-02a.qzp
$ cat q08-02a.qzp | wc -l
      51

If there is anything else I can test, please let me know.

Joseph

Message #14 received at 15414 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Joseph Mingrone <jrm <at> ftfl.ca>
Cc: 15414 <at> debbugs.gnu.org
Subject: Re: bug#15414: 24.3; piping problems in eshell
Date: Thu, 19 Sep 2013 13:07:17 -0400

Joseph Mingrone wrote:

> Were either of those systems running FreeBSD?

As it happens, no.

> If there is anything else I can test, please let me know.

Maybe pipe cat to cat -v -n, and see what goes missing / gets added?

Message #17 received at 15414 <at> debbugs.gnu.org (full text, mbox):

From: Joseph Mingrone <jrm <at> ftfl.ca>
To: Glenn Morris <rgm <at> gnu.org>
Subject: Re: bug#15414: 24.3; piping problems in eshell
Date: Sat, 21 Sep 2013 20:41:58 -0300

Glenn Morris <rgm <at> gnu.org> writes:
> Maybe pipe cat to cat -v -n, and see what goes missing / gets added?

% cat test.in | cat -v > test.out
% diff test.in test.out

The diff shows that test.out gets truncated after 1984 characters
(that's what wc -m test.out reports).

The contents of test.in, test.out and the diff follow.

Joseph

---------------------- test.in ----------------------
// Stat2080 Assignment 8  Winter 2012/2013

// Question 2a

/LET itX = mathBeg_m+"X"+mathEnd_m
/LET itY = mathBeg_m+"Y"+mathEnd_m
/LET itSSxx = mathBeg_m+"SS"+mathEnd_m+subBeg_m+"xx"+subEnd_m
/LET itSSyy = mathBeg_m+"SS"+mathEnd_m+subBeg_m+"yy"+subEnd_m
/LET itSSxy = mathBeg_m+"SS"+mathEnd_m+subBeg_m+"xy"+subEnd_m
/LET itH0 = mathBeg_m+"H"+mathEnd_m+subBeg_m+"0"+subEnd_m
/LET itHa = mathBeg_m+"H"+mathEnd_m+subBeg_m+"a"+subEnd_m
/LET itF = mathBeg_m+"F"+mathEnd_m

/LET n = 10
/LET xm = 5.
/LET ym = 12.
/LET SSxy = 121.+random(1,8)
/LET SSxx = 136.+random(1,8)
/LET SSyy = 155.
/LET b1 = SSxy/SSxx	// beta1_hat
/LET b0 = ym-b1*xm	// bet0_hat
/LET b1 = roundto(b1,2)
/LET b0 = roundto(b0,2)

/LET dft = n-1
/LET dfr = 1
/LET dfe = dft-dfr
/LET SSR = SSxy*SSxy/SSxx
/LET SST = SSyy
/LET SSE = SST-SSR
/LET MSR = SSR/dfr
/LET MSE = SSE/dfe
/LET R2  = SSR/SST
/LET SEb1= sqrt(MSE/SSxx)

A straight line is fitted to some data using least squares and the following summary statistics:/DIS(newLine_m)
/DIS(n_gw+eq_m)/DIS(n),/DIS(hSpace1_m) /DIS(xbar_gw+eq_m)/DIS(xm:0f),/DIS(hSpace1_m) /DIS(ybar_gw+eq_m)/DIS(ym:0f),/DIS(hSpace1_m) 
/DIS(itSSxy+eq_m)/DIS(SSxy:0f), /DIS(newLine_m) /DIS(itSSxx+eq_m)/DIS(SSxx:0f),/DIS(hSpace1_m) /DIS(itSSyy+eq_m)/DIS(SSyy:0f)./DIS(newLine_m)
The least squares intercept and slope are /DIS(b0:2f) and /DIS(b1:2f), respectively, and the ANOVA table is 
/DIS(vSpace10_m)
/DIS(web("","\begin{tabular}{|l|c|c|c|} \hline","<table border='1' cellpadding='4'><tr><th>")) \
Source /DIS(seph_m) DF /DIS(seph_m) SS /DIS(seph_m) MS 
/DIS(nllh_m)
/DIS(web("","","<tr align='center'><td>")) \
Regression /DIS(sep_m) /DIS(dfr) /DIS(sep_m) /DIS(SSR:2f) /DIS(sep_m) /DIS(MSR:2f) /DIS(nll_m)
/DIS(web("","","<tr align='center'><td>")) \
Residual /DIS(sep_m) /DIS(dfe) /DIS(sep_m) /DIS(SSE:2f) /DIS(sep_m) /DIS(MSE:2f)  /DIS(nll_m)
/DIS(web("","","<tr align='center'><td>")) \
Total /DIS(sep_m) /DIS(dft) /DIS(sep_m) /DIS(SST:2f)/DIS(sep_m)/DIS(nbsp_m) /DIS(nll_m)
/DIS(web("","\end{tabular}","</table>"))
/DIS(vSpace10_m)

/LET xstar = random(7,10)
/LET yhat = b0+b1*xstar

/IMP "/dalphysicslib/Tools/Problem"
What is the estimated mean value for /DIS(y_gw) when /DIS(x_gw+eq_m)/DIS(xstar)?

/ANS(yhat:2f, tol=0.03, wgt=wgt_v, tries=tries_v)

/LET yhat = random(18,22)
/LET xstar = (yhat-b0)/b1

/IMP "/dalphysicslib/Tools/Problem"
If the fitted value for /DIS(y_gw) is /DIS(yhat), what is the corresponding value for /DIS(x_gw)?

/ANS(xstar:2f, tol=0.03, wgt=wgt_v, tries=tries_v)

/LET percent = R2*100

/IMP "/dalphysicslib/Tools/Problem"
What percent of the variation in /DIS(y_gw) is explained by the regression in /DIS(x_gw)? Enter an integer, without the /DIS(pct_u) sign.

/ANS(percent:0f, tol=0.6, wgt=wgt_v, tries=tries_v)

/IMP "/dalphysicslib/Tools/Problem"
What is the standard error of the slope estimate? Enter 3 decimals.

/ANS(SEb1:3f, tol=0.01, wgt=wgt_v, tries=tries_v)

---------------------- test.out ----------------------
// Stat2080 Assignment 8  Winter 2012/2013

// Question 2a

/LET itX = mathBeg_m+"X"+mathEnd_m
/LET itY = mathBeg_m+"Y"+mathEnd_m
/LET itSSxx = mathBeg_m+"SS"+mathEnd_m+subBeg_m+"xx"+subEnd_m
/LET itSSyy = mathBeg_m+"SS"+mathEnd_m+subBeg_m+"yy"+subEnd_m
/LET itSSxy = mathBeg_m+"SS"+mathEnd_m+subBeg_m+"xy"+subEnd_m
/LET itH0 = mathBeg_m+"H"+mathEnd_m+subBeg_m+"0"+subEnd_m
/LET itHa = mathBeg_m+"H"+mathEnd_m+subBeg_m+"a"+subEnd_m
/LET itF = mathBeg_m+"F"+mathEnd_m

/LET n = 10
/LET xm = 5.
/LET ym = 12.
/LET SSxy = 121.+random(1,8)
/LET SSxx = 136.+random(1,8)
/LET SSyy = 155.
/LET b1 = SSxy/SSxx	// beta1_hat
/LET b0 = ym-b1*xm	// bet0_hat
/LET b1 = roundto(b1,2)
/LET b0 = roundto(b0,2)

/LET dft = n-1
/LET dfr = 1
/LET dfe = dft-dfr
/LET SSR = SSxy*SSxy/SSxx
/LET SST = SSyy
/LET SSE = SST-SSR
/LET MSR = SSR/dfr
/LET MSE = SSE/dfe
/LET R2  = SSR/SST
/LET SEb1= sqrt(MSE/SSxx)

A straight line is fitted to some data using least squares and the following summary statistics:/DIS(newLine_m)
/DIS(n_gw+eq_m)/DIS(n),/DIS(hSpace1_m) /DIS(xbar_gw+eq_m)/DIS(xm:0f),/DIS(hSpace1_m) /DIS(ybar_gw+eq_m)/DIS(ym:0f),/DIS(hSpace1_m) 
/DIS(itSSxy+eq_m)/DIS(SSxy:0f), /DIS(newLine_m) /DIS(itSSxx+eq_m)/DIS(SSxx:0f),/DIS(hSpace1_m) /DIS(itSSyy+eq_m)/DIS(SSyy:0f)./DIS(newLine_m)
The least squares intercept and slope are /DIS(b0:2f) and /DIS(b1:2f), respectively, and the ANOVA table is 
/DIS(vSpace10_m)
/DIS(web("","\begin{tabular}{|l|c|c|c|} \hline","<table border='1' cellpadding='4'><tr><th>")) \
Source /DIS(seph_m) DF /DIS(seph_m) SS /DIS(seph_m) MS 
/DIS(nllh_m)
/DIS(web("","","<tr align='center'><td>")) \
Regression /DIS(sep_m) /DIS(dfr) /DIS(sep_m) /DIS(SSR:2f) /DIS(sep_m) /DIS(MSR:2f) /DIS(nll_m)
/DIS(web("","","<tr align='center'><td>")) \
Residual /DIS(sep_m) /DIS(dfe) /DIS(sep_m) /DIS(SSE:2f) /DIS(sep_m) /DIS(MSE:2f)  /DIS(nll_m)
/DIS(web("","","<tr align='center'><td>")) \
Total /DIS(sep_m) /DIS(dft) /DIS(sep_m) /DIS(SST:2f)/DIS(sep_m)/DIS(nbsp_m) /DIS(nll_m)
/DIS(we

---------------------- diff output ----------------------
diff -c /home/jrm/test.in /home/jrm/test.out
*** /home/jrm/test.in	2013-09-21 20:31:23.000000000 -0300
--- /home/jrm/test.out	2013-09-21 20:32:06.000000000 -0300
***************
*** 47,79 ****
  Residual /DIS(sep_m) /DIS(dfe) /DIS(sep_m) /DIS(SSE:2f) /DIS(sep_m) /DIS(MSE:2f)  /DIS(nll_m)
  /DIS(web("","","<tr align='center'><td>")) \
  Total /DIS(sep_m) /DIS(dft) /DIS(sep_m) /DIS(SST:2f)/DIS(sep_m)/DIS(nbsp_m) /DIS(nll_m)
! /DIS(web("","\end{tabular}","</table>"))
! /DIS(vSpace10_m)
! 
! /LET xstar = random(7,10)
! /LET yhat = b0+b1*xstar
! 
! /IMP "/dalphysicslib/Tools/Problem"
! What is the estimated mean value for /DIS(y_gw) when /DIS(x_gw+eq_m)/DIS(xstar)?
! 
! /ANS(yhat:2f, tol=0.03, wgt=wgt_v, tries=tries_v)
! 
! /LET yhat = random(18,22)
! /LET xstar = (yhat-b0)/b1
! 
! /IMP "/dalphysicslib/Tools/Problem"
! If the fitted value for /DIS(y_gw) is /DIS(yhat), what is the corresponding value for /DIS(x_gw)?
! 
! /ANS(xstar:2f, tol=0.03, wgt=wgt_v, tries=tries_v)
! 
! /LET percent = R2*100
! 
! /IMP "/dalphysicslib/Tools/Problem"
! What percent of the variation in /DIS(y_gw) is explained by the regression in /DIS(x_gw)? Enter an integer, without the /DIS(pct_u) sign.
! 
! /ANS(percent:0f, tol=0.6, wgt=wgt_v, tries=tries_v)
! 
! /IMP "/dalphysicslib/Tools/Problem"
! What is the standard error of the slope estimate? Enter 3 decimals.
! 
! /ANS(SEb1:3f, tol=0.01, wgt=wgt_v, tries=tries_v)
--- 47,50 ----
  Residual /DIS(sep_m) /DIS(dfe) /DIS(sep_m) /DIS(SSE:2f) /DIS(sep_m) /DIS(MSE:2f)  /DIS(nll_m)
  /DIS(web("","","<tr align='center'><td>")) \
  Total /DIS(sep_m) /DIS(dft) /DIS(sep_m) /DIS(SST:2f)/DIS(sep_m)/DIS(nbsp_m) /DIS(nll_m)
! /DIS(we
\ No newline at end of file

Diff finished.  Sat Sep 21 20:38:34 2013

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