Bug 75903

Summary:	Crashes on document.formname.fieldname.focus() in Javascript
Product:	[Applications] konqueror	Reporter:	Hogne Titlestad <m0ns00n>
Component:	khtml	Assignee:	Konqueror Bugs <konqueror-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal
Priority:	NOR
Version First Reported In:	3.2
Target Milestone:	---
Platform:	Compiled Sources
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	login_screen.html backtrace.txt

Description Hogne Titlestad 2004-02-23 10:50:30 UTC

Version:           3.2 (using KDE KDE 3.2.0)
Installed from:    Compiled From Sources
Compiler:          Gcc 3.2.3 athlonxp
OS:          Linux

Konqueror 3.2 crashes every time I run this javascript code from a form:

function verifyFields()
{
	if ( document.loginform.username.value.length < 1 )
	{
		alert ( "Please enter a username" );
		document.loginform.username.focus();
		return -1;
	}
	if ( document.loginform.password.value.length < 1 )
	{
		alert ( "Please enter a password" );
		document.loginform.password.focus();
		return -1;
	}
}

This is a serious bug which prevents me from using Konqueror in development. All prior version of Konqueror 3.1.x ran this code without problems. Let's hope Konqueror 3.2.1 is a better one :)

Comment 1 Harri Porten 2004-02-23 11:12:39 UTC

I cannot reproduce this with the following example form (and current 3.2.x branch):

<form name="loginform" onsubmit="verifyFields()">
<input type="text" name="username">
<input type="text" name="password">
<input type="submit" name="Submit">
</form>

Could you provide a complete example, please?

Comment 2 Hogne Titlestad 2004-02-23 11:18:14 UTC

Hey!

That was fast!

I can!

I am attaching the HTML. Just click "Logg deg inn", the button, meaning "Log 
in", and it should crash. It does here in all variants every time. I am 
including the backtrace as well.

My best regards,

Hogne Titlestad

On Monday 23 February 2004 11:12, Harri Porten wrote:
> ------- You are receiving this mail because: -------
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>
> http://bugs.kde.org/show_bug.cgi?id=75903
>
>
>
>
> ------- Additional Comments From porten kde org  2004-02-23 11:12 -------
> I cannot reproduce this with the following example form (and current 3.2.x
> branch):
>
> <form name="loginform" onsubmit="verifyFields()">
> <input type="text" name="username">
> <input type="text" name="password">
> <input type="submit" name="Submit">
> </form>
>
> Could you provide a complete example, please?


Created an attachment (id=4851)
login_screen.html

Created an attachment (id=4852)
backtrace.txt

Comment 3 Harri Porten 2004-02-23 11:31:59 UTC

David was able to reproduce this crash. Still works for me. KHTMLPartBrowserExtension::updateEditActions calls inherits() on a NULL pointer.

Comment 4 Harri Porten 2004-02-23 11:41:23 UTC


*** This bug has been marked as a duplicate of 75353 ***

Comment 5 jspedron 2004-06-30 15:51:43 UTC

I reproduced this bug with Konqueror 3.2.2 on KDE 3.2.3.

I found that Konqueror crashes on the line
  document.forms[n].fieldname.focus();
when it follows an alert().

This example will segfault:
  alert("You didn't entered a name");
  document.forms[0].name.focus();

But this one won't:
  document.forms[0].name.focus();
  alert("You didn't entered a name");
(and the effect is the same)