Bug 15731 – REGRESSION(r27176): Reproducible crash while trying to order dinner makes bdash sad

• Status: RESOLVED
• Resolution: FIXED
• Component: New Bugs

[Mark Rowe (bdash)]

Steps to reproduce:
1. Visit http://www.menulog.com.au/search.php?submit2=T&searchMode=takeaway&cartType=delivery&majorRegionId=28&postcode=2010
2. Click the "Order" button alongside one of the restaurants that prepares yummy food.
3. Click "Order Delivery".
4. Click on "Surry Hills - 2010" so that the food can be delivered to me.

Expected results:
Tasty food delivered to my door.

Actual results:
Crash after step 5.

Notes:
This worked as recently as last Wednesday.

[Mark Rowe (bdash)]

Created attachment 16911 [details]
Crash log

[Mark Rowe (bdash)]

Top of the crash log for easy reference:

Exception Type:  EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000000000000
Crashed Thread:  0

Thread 0 Crashed:
0   com.apple.WebCore             	0x01e7838c KJS::Window::pauseTimeouts() + 248 (kjs_window.cpp:1564)
1   com.apple.WebCore             	0x020a15af WebCore::CachedPage::CachedPage(WebCore::Page*) + 615 (CachedPage.cpp:101)
2   com.apple.WebCore             	0x020a1668 WebCore::CachedPage::CachedPage(WebCore::Page*) + 24 (CachedPage.cpp:110)
3   com.apple.WebCore             	0x020a169b WebCore::CachedPage::create(WebCore::Page*) + 49 (CachedPage.cpp:72)

[Mark Rowe (bdash)]

> Actual results:
> Crash after step 5.

This should have said step 4.

[Eric Seidel (no email)]

Doesn't crash for me in a debug build.

[Mark Rowe (bdash)]

Hrm, in step 2 try the second restaurant in the list, "Foodgame".  Some others appear to not crash.

[Mark Rowe (bdash)]

"git bisect" has narrowed this down to Maciej's HashTable change in http://trac.webkit.org/projects/webkit/changeset/27176.  Previous revisions do not crash.

[John Moe]

Reduction:
<script>
setTimeout('',1000);
clearTimeout(0);
clearTimeout(0);
window.location = 'about:blank';
</script>

In pauseTimeouts, d->m_timeouts.size() is returning a negative number.

[David Kilzer (:ddkilzer)]

Created attachment 16924 [details]
Reduction from Comment #7

[David Kilzer (:ddkilzer)]

(In reply to comment #7)
> Reduction: [...[
> 
> In pauseTimeouts, d->m_timeouts.size() is returning a negative number.

Thanks, John!

[Maciej Stachowiak]

Created attachment 16929 [details]
let bdash have dinner

[Mark Rowe (bdash)]

Comment on attachment 16929 [details]
let bdash have dinner

r=me