Bug 241394

Summary:	crash when trying to configure stdin datasource
Product:	[Applications] kst	Reporter:	Timo Lindfors <timo.lindfors>
Component:	general	Assignee:	kst
Status:	RESOLVED FIXED
Severity:	crash
Priority:	NOR
Version:	1.7.0
Target Milestone:	---
Platform:	Debian unstable
OS:	Linux
Latest Commit:		Version Fixed In:

Description Timo Lindfors 2010-06-11 10:50:58 UTC

Version:           1.7.0 (using KDE 4.4.3) 
OS:                Linux

Steps to reproduce:
1) while true; do echo $RANDOM; sleep 1; done | kst -y 1 stdin
2) Data->Data Manager
3) 1 Data Vector->Edit
4) Configure

Expected results:
4) kst does not crash

Actual results:
4) kst crashes:

kst: ascii.cpp:923: virtual void ConfigWidgetAscii::load(): Assertion `src' failed.
KCrash: Application 'kst' crashing...
KCrash cannot reach kdeinit, launching directly.


Reproducible: Always

Comment 1 Andrew Walker 2010-06-11 21:12:52 UTC

SVN commit 1137142 by arwalker:

BUG:241394 cleanup several underlying problems with the stdin data source

 M  +17 -3     datasources/ascii/ascii.cpp  
 M  +8 -3      kst/main.cpp  
 M  +6 -1      libkst/kstdatasource.cpp  
 M  +1 -0      libkst/kstdatasource.h  
 M  +5 -0      libkst/stdinsource.cpp  
 M  +1 -0      libkst/stdinsource.h  


WebSVN link: http://websvn.kde.org/?view=rev&revision=1137142

Comment 2 Nicolas Brisset 2010-06-14 08:32:27 UTC

Does this need to be applied to kst 2.x as well?

Comment 3 Timo Lindfors 2010-06-14 10:25:36 UTC

Please reopen. Now even step 1 fails:

$ while true; do echo $RANDOM; sleep 1; done | src/kst/kst -y 1 stdin
kst: ERROR: No data in file stdin.  Trying to continue...

and using a temporary file does not help:

$ while true; do echo $RANDOM; sleep 1; done > a
$ head a
31215
25986
25817
$ src/kst/kst -y 1 stdin < a
kst: ERROR: No data in file stdin.  Trying to continue...

Comment 4 Andrew Walker 2010-06-14 20:13:19 UTC

This was by design. When kst first tries to read the temp file it will be 
empty and so an error was reported.

I've removed the error reported on stdout, and changed the error message in 
the debug log to a warning message.

Beyond that the data is displayed as expected.

Andrew

----- Original Message ----- 
From: "Timo Lindfors" <timo.lindfors@iki.fi>
To: <kst@kde.org>
Sent: Monday, June 14, 2010 1:25 AM
Subject: [Kst] [Bug 241394] crash when trying to configure stdin datasource


> https://bugs.kde.org/show_bug.cgi?id=241394
>
>
>
>
>
> --- Comment #3 from Timo Lindfors <timo lindfors iki fi>  2010-06-14 
> 10:25:36 ---
> Please reopen. Now even step 1 fails:
>
> $ while true; do echo $RANDOM; sleep 1; done | src/kst/kst -y 1 stdin
> kst: ERROR: No data in file stdin.  Trying to continue...
>
> and using a temporary file does not help:
>
> $ while true; do echo $RANDOM; sleep 1; done > a
> $ head a
> 31215
> 25986
> 25817
> $ src/kst/kst -y 1 stdin < a
> kst: ERROR: No data in file stdin.  Trying to continue...
>
> -- 
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>

Comment 5 Timo Lindfors 2010-06-14 20:57:38 UTC

Hmm? But "head a" printed lines so surely the input file "a" was not empty?