Re: crashes using history

[Daniel J S. <dan...@ie...>]

Ethan A Merritt wrote:
> On Wednesday 28 June 2006 03:07 pm, Petr Mikulik wrote:
> 
>>>The problem actually appears to be something that was sitting in the code for 
>>>quite a while.
>>>SourceForge bugs-report isn't working right now.  I've attached the patch
>>
>>I've committed it to cvs.
> 
> 
> Unfortunately, I think this was a step backwards.
> Before this went in, I was unable to replicate the reported crashes.
> I'm sure they were real, but they must have been hard to trigger.
> With this new patch in cvs, I now get the following:
> 
> gnuplot> history !re
>   Executing:
>         reset
> gnuplot> history !rep
>   Executing:
>         replot
>          ^
>          no previous plot
> gnuplot> 
> *** glibc detected *** malloc(): memory corruption: 0x081e8260 ***
> 
> So I think there is a serious memory error in this code that
> was just added.

That or you found another bug.  I didn't touch anything with the malloc() command or the ! form of history.  Only the portion that displays the code, write_history_n().  The command sequence above should not make a call to write_history_n().

Give me a couple hours to see if there is another bug here.  I have tried your command sequence and can reproduce something similar.

Dan