Bug 13413 – Failed assertion in RenderTextControl::setSelectionRange in Google Spreadsheets

• Component: DOM
• Status: RESOLVED FIXED

[Adam Roben (:aroben)]

I'm seeing an assertion failure whenever I try to view a spreadsheet in Google Spreadsheets:

0x011859c0 in WebCore::RenderTextControl::setSelectionRange (this=0x17e426ec, start=0, end=0) at /Volumes/Data/Users/adamroben/dev/WebKit/OpenSource/WebCore/rendering/RenderTextControl.cpp:433
433         ASSERT(startPosition.isNotNull() && endPosition.isNotNull());

Repro steps:
1. Go to http://docs.google.com/ and log in
2. Click the "New spreadsheet" link
3. Click "OK" in the alert that tells you Safari is not supported

Here's a bit of the backtrace:

#0  0x011859c0 in WebCore::RenderTextControl::setSelectionRange (this=0x17e426ec, start=0, end=0) at /Volumes/Data/Users/adamroben/dev/WebKit/OpenSource/WebCore/rendering/RenderTextControl.cpp:433
#1  0x010ad23b in WebCore::HTMLTextAreaElement::setSelectionRange (this=0x17e4c5f0, start=0, end=0) at /Volumes/Data/Users/adamroben/dev/WebKit/OpenSource/WebCore/html/HTMLTextAreaElement.cpp:123
#2  0x010ad864 in WebCore::HTMLTextAreaElement::updateFocusAppearance (this=0x17e4c5f0, restorePreviousSelection=true) at /Volumes/Data/Users/adamroben/dev/WebKit/OpenSource/WebCore/html/HTMLTextAreaElement.cpp:229
#3  0x010ad7d0 in WebCore::HTMLTextAreaElement::focus (this=0x17e4c5f0) at /Volumes/Data/Users/adamroben/dev/WebKit/OpenSource/WebCore/html/HTMLTextAreaElement.cpp:218
#4  0x012a70bd in WebCore::JSHTMLTextAreaElementPrototypeFunction::callAsFunction (this=0x17c2d3e0, exec=0xbfffc43c, thisObj=0x17a33e50, args=@0xbfffc168) at /Volumes/Data/development/BuildProducts/Debug/DerivedSources/WebCore/JSHTMLTextAreaElement.cpp:271
#5  0x006918fa in KJS::JSObject::call (this=0x17c2d3e0, exec=0xbfffc43c, thisObj=0x17a33e50, args=@0xbfffc168) at /Volumes/Data/Users/adamroben/dev/WebKit/OpenSource/JavaScriptCore/kjs/object.cpp:97

Created attachment 14099 [details]
Reduction

Created attachment 14298 [details]
Possible fix

This fixes the reduction, but given bug 13467 I'm not sure what's the effect on Google Spreadsheets. There is also a subtle difference from Firefox, which allows you to enter text into a 0-height textarea. I don't know if it makes a difference in practice.

Comment on attachment 14298 [details]
Possible fix

With this patch, after rolling out r20972 (which caused bug 13467), I don't hit the assert in Google Spreadsheets and it seems to function okay, in that i can type into the first cell without having to click or do anything to focus it.

Created attachment 15006 [details]
Do not set the selection in zero-height text controls

Same as before, now with change log and a layout test.

[Adele Peterson]

Comment on attachment 15006 [details]
Do not set the selection in zero-height text controls

This seems reasonable to me

[Mark Rowe (bdash)]

Landed in r23565.