Bug 15008 – ASSERTION FAILED: !firstLineBox() == !lastLineBox() setting content on image

• Status: RESOLVED
• Resolution: FIXED
• Component: Layout and Rendering

[Jan Van Boghout]

Safari will always crash when visiting this page: http://macrabbit.com/webkit-bugs/img-content/

Crash report: http://macrabbit.com/webkit-bugs/img-content/CrashReport.crash.log
Note from user: http://macrabbit.com/webkit-bugs/img-content/CrashReport.note

[Jan Van Boghout]

*** Bug 15007 has been marked as a duplicate of this bug. ***

[David Kilzer (:ddkilzer)]

<rdar://problem/5421397>

[Matt Lilek]

Confirmed with r25142 debug build which hits this assert:
ASSERTION FAILED: !firstLineBox() == !lastLineBox()
(/Users/matt/Code/WebKit/WebCore/rendering/RenderInline.cpp:327 virtual int WebCore::RenderInline::height() const)

I can't get this to crash in a release build though (using r25145 nightly).

Thread 0 Crashed:
0   com.apple.WebCore        	0x0119d01c WebCore::RenderInline::height() const + 144 (RenderInline.cpp:327)
1   com.apple.WebCore        	0x01195a80 WebCore::RenderFlow::absoluteClippedOverflowRect() + 1164 (RenderFlow.cpp:503)
2   com.apple.WebCore        	0x011b5c00 WebCore::RenderObject::repaint(bool) + 228 (RenderObject.cpp:1753)
3   com.apple.WebCore        	0x0117a1b8 WebCore::RenderBox::imageChanged(WebCore::CachedImage*) + 292 (RenderBox.cpp:464)
4   com.apple.WebCore        	0x0112cc04 WebCore::CachedImage::ref(WebCore::CachedResourceClient*) + 152 (CachedImage.cpp:83)
5   com.apple.WebCore        	0x011994cc WebCore::RenderImage::setCachedImage(WebCore::CachedImage*) + 184 (RenderImage.cpp:71)
6   com.apple.WebCore        	0x01337390 WebCore::HTMLImageLoader::notifyFinished(WebCore::CachedResource*) + 144 (HTMLImageLoader.cpp:142)
7   com.apple.WebCore        	0x0112cfc0 WebCore::CachedImage::checkNotify() + 108 (CachedImage.cpp:218)
8   com.apple.WebCore        	0x0112d2ec WebCore::CachedImage::data(WTF::PassRefPtr<WebCore::SharedBuffer>, bool) + 428 (CachedImage.cpp:201)
9   com.apple.WebCore        	0x01131f68 WebCore::Loader::didFinishLoading(WebCore::SubresourceLoader*) + 408 (loader.cpp:116)
10  com.apple.WebCore        	0x01493034 WebCore::SubresourceLoader::didFinishLoading() + 204 (SubresourceLoader.cpp:195)
11  com.apple.WebCore        	0x01490e38 WebCore::ResourceLoader::didFinishLoading(WebCore::ResourceHandle*) + 60
12  com.apple.WebCore        	0x01464a68 -[WebCoreResourceHandleAsDelegate connectionDidFinishLoading:] + 204 (ResourceHandleMac.mm:443)
13  com.apple.Foundation     	0x92c1389c -[NSURLConnection(NSURLConnectionInternal) _sendDidFinishLoadingCallback] + 188
14  com.apple.Foundation     	0x92c11b08 -[NSURLConnection(NSURLConnectionInternal) _sendCallbacks] + 556

[David Kilzer (:ddkilzer)]

With a local debug build of WebKit r25142 with Safari 3 Public Beta v. 3.0.3 (522.12.1) on Mac OS X 10.4.10 (8R218), I get an assertion failure:

ASSERTION FAILED: !firstLineBox() == !lastLineBox()
(/path/to/WebKit/WebCore/rendering/RenderInline.cpp:327 virtual int WebCore::RenderInline::height() const)
Segmentation fault

With WebKit Nightly r25145 and Safari 3 Public Beta v. 3.0.3 on 10.4.10, I don't see a crash.

With the Safari 3 Public Beta v. 3.0.3 with its original WebKit on 10.4.10, I DO see the crash described in this bug.

With Safari 2.0.4 (419.3) with its original WebKit on 10.4.10, I do not see the crash.

P1 since this does lead to a crash. I am preparing a patch now.

Created attachment 16023 [details]
Check that the renderer is an image before calling RenderImage methods

Follows the existing behavior of loading the image even if it is not to be rendered.

[Adam Roben (:aroben)]

Comment on attachment 16023 [details]
Check that the renderer is an image before calling RenderImage methods

+    if (RenderObject* renderer = element()->renderer()) {
+        if (renderer->isImage())
+            static_cast<RenderImage*>(renderer)->resetAnimation();
+    }

The braces here aren't necessary (or anywhere else in the lines you added in this patch).

r=me

[Matt Lilek]

Committed revision 25150 with the brace tweaks Adam mentioned.