Re: [Bug-XBoard] xboard crashes with engine

[Eric Mullins]

h.g. muller wrote:
> The problem is that for me this seems to work, which makes debugging hard.
> When this problem occurs, did you start up XBoard with the 
> engine-output window
> open or closed. If my theory is correct, when the window has never 
> been opened,
> this code should not be executed. (But once opened, closing just hides 
> it, and
> the contents will be updated.) If the crash occurs without 
> engine-output window,
> it must have a different cause.

It might be prudent to determine why we aren't getting the same 
behavior.  Perhaps git is different than your tree, or it's related to 
some config setting required that isn't being used on mine because of 
whatever the resources issue is I'm having.

> But otherwise, in xengineoutput.c there is the code
>
> void InsertIntoMemo( int which, char * text, int where )
> {
>         Arg arg; XawTextBlock t; Widget edit;
>
>         if(t.ptr = strchr(text, '\r')) *t.ptr = ' ';
>         t.ptr = text; t.firstPos = 0; t.length = strlen(text); 
> t.format = XawFmt8Bit;
>         edit = XtNameToWidget(engineOutputShell, which ? "*form2.text" 
> : "*form.text");
>         XawTextReplace(edit, where, where, &t);
> //      XtSetArg(arg, XtNstring, (XtArgVal) text);
> //      XtSetValues(outputField[which][nMemo], &arg, 1);
> }
>
> which is new in  two respects: the parameter 'where' used to be a hard 
> zero,
> and the if to suppress the '\r' was added. So perhaps you could test 
> what happens
> when you
>
> 1) comment out the if() statement
> 2) replace it by "where = 0;"
>
> The latter should be always valid as parameter to XawTextReplace.


These changes made no difference.