Bug 12016 – REGRESSION(r18342): fast/text/stroking-decorations.html test fails with bus error in no-svg build

• Status: RESOLVED
• Resolution: FIXED
• Component: Tools / Tests

[David Kilzer (:ddkilzer)]

The fast/text/stroking-decorations.html test failes with a Bus Error in the no-svg build.  Stack trace:

Thread 0 Crashed:
0   libSystem.B.dylib           0x9000af30 __vfprintf + 479
1   libSystem.B.dylib           0x9000ad40 sprintf + 480
2   com.apple.WebCore           0x0100e850 WebCore::TextStream::operator<<(float) + 56 (TextStream.cpp:102)
3   com.apple.WebCore           0x01031921 WebCore::operator<<(WebCore::TextStream&, WebCore::RenderObject const&) + 211
7 (RenderTreeAsText.cpp:170)
4   com.apple.WebCore           0x010326dc WebCore::write(WebCore::TextStream&, WebCore::RenderObject const&, int) + 36 
(RenderTreeAsText.cpp:299)
5   com.apple.WebCore           0x010327c3 WebCore::write(WebCore::TextStream&, WebCore::RenderObject const&, int) + 267
 (RenderTreeAsText.cpp:309)
6   com.apple.WebCore           0x010327c3 WebCore::write(WebCore::TextStream&, WebCore::RenderObject const&, int) + 267
 (RenderTreeAsText.cpp:309)
7   com.apple.WebCore           0x01032bbc WebCore::write(WebCore::TextStream&, WebCore::RenderLayer&, WebCore::IntRect 
const&, WebCore::IntRect const&, WebCore::IntRect const&, WebCore::IntRect const&, int, int) + 694 (RenderTreeAsText.cpp
:367)
8   com.apple.WebCore           0x010325e1 WebCore::writeLayers(WebCore::TextStream&, WebCore::RenderLayer const*, WebCo
re::RenderLayer*, WebCore::IntRect const&, int) + 459 (RenderTreeAsText.cpp:393)
9   com.apple.WebCore           0x01032692 WebCore::writeLayers(WebCore::TextStream&, WebCore::RenderLayer const*, WebCo
re::RenderLayer*, WebCore::IntRect const&, int) + 636 (RenderTreeAsText.cpp:401)
10  com.apple.WebCore           0x01032caf WebCore::externalRepresentation(WebCore::RenderObject*) + 235 (RenderTreeAsTe
xt.cpp:463)
11  com.apple.WebCore           0x0107fcae -[WebCoreFrameBridge renderTreeAsExternalRepresentation] + 36 (WebCoreFrameBr
idge.mm:894)
12  com.apple.WebKit            0x0020be99 -[WebFrame(WebKitDebug) renderTreeAsExternalRepresentation] + 57
13  DumpRenderTree              0x00007903 dump + 828 (DumpRenderTree.m:546)
14  DumpRenderTree              0x0000891e -[WaitUntilDoneDelegate webView:locationChangeDone:forDataSource:] + 148 (Dum
pRenderTree.m:719)
15  DumpRenderTree              0x00008aa1 -[WaitUntilDoneDelegate webView:didFinishLoadForFrame:] + 67 (DumpRenderTree.
m:746)
16  libobjc.A.dylib             0x90a59d76 objc_msgSendv + 54
17  com.apple.Foundation        0x925ff43e -[NSInvocation invoke] + 932
18  com.apple.Foundation        0x92625433 -[NSInvocation invokeWithTarget:] + 67
19  com.apple.WebKit            0x00268732 -[_WebSafeForwarder forwardInvocation:] + 448 (WebView.mm:1660)
20  com.apple.Foundation        0x925fe4f4 -[NSObject(NSForwardInvocation) forward::] + 469
21  libobjc.A.dylib             0x90a59cc1 _objc_msgForward + 49
22  com.apple.WebKit            0x0029bc9d WebFrameLoaderClient::dispatchDidFinishLoad() + 153 (WebFrameLoaderClient.mm:
630)
23  com.apple.WebCore           0x012891e8 WebCore::FrameLoader::checkLoadCompleteForThisFrame() + 1080 (FrameLoaderMac.
mm:1043)
24  com.apple.WebCore           0x0129dd8c WebCore::FrameLoader::checkLoadComplete() + 144 (FrameLoader.cpp:2124)
25  com.apple.WebCore           0x0129e445 WebCore::FrameLoader::finishedLoading() + 227 (FrameLoader.cpp:1956)
26  com.apple.WebCore           0x0128f7c5 WebCore::MainResourceLoader::didFinishLoading() + 211 (MainResourceLoaderMac.
mm:324)
27  com.apple.WebCore           0x0128d858 WebCore::ResourceLoader::didFinishLoading(WebCore::ResourceHandle*) + 24 (Res
ourceLoaderMac.mm:447)
28  com.apple.WebCore           0x0129944d -[WebCoreResourceHandleAsDelegate connectionDidFinishLoading:] + 79 (Resource
HandleMac.mm:296)
29  com.apple.Foundation        0x9265ee00 -[NSURLConnection(NSURLConnectionInternal) _sendDidFinishLoadingCallback] + 1
76
30  com.apple.Foundation        0x9265cea5 -[NSURLConnection(NSURLConnectionInternal) _sendCallbacks] + 748
31  com.apple.Foundation        0x9265cb41 _sendCallbacks + 201
32  com.apple.CoreFoundation    0x9082afd2 CFRunLoopRunSpecific + 1213
33  com.apple.CoreFoundation    0x9082ab0e CFRunLoopRunInMode + 61
34  com.apple.Foundation        0x9262ddc6 -[NSRunLoop runMode:beforeDate:] + 182
35  DumpRenderTree              0x00009dfe runTest + 950 (DumpRenderTree.m:1086)
36  DumpRenderTree              0x00006da9 dumpRenderTree + 3355 (DumpRenderTree.m:400)
37  DumpRenderTree              0x00006fb0 main + 70 (DumpRenderTree.m:450)
38  DumpRenderTree              0x00002da2 _start + 216
39  DumpRenderTree              0x00002cc9 start + 41

[David Kilzer (:ddkilzer)]

Considering this a regression since DRT didn't crash before r18342 when LayoutTests/fast/text/stroking-decorations.html was added.

[David Kilzer (:ddkilzer)]

Created attachment 12086 [details]
Patch v1

Fixes incorrect initialization of precisionFormats array (missing comma caused pre-processor concatenation of last two strings) in TextStream.cpp.

Fixes RenderTreeAsText::externalRepresentation() to set the precision of the TextStream regardless of SVG support.  This allows fast/text/stroking-decorations.html and fast/text/stroking.html to pass on the no-svg build.

[David Kilzer (:ddkilzer)]

(In reply to comment #2)
> Created an attachment (id=12086) [edit]
> Patch v1

I ran all tests in both the svg and no-svg builds, and there are no regressions caused by these changes (only fixes to the stroking tests for the no-svg build).

Comment on attachment 12086 [details]
Patch v1

Missing space:
+        - fixhttp://bugs.webkit.org/show_bug.cgi?id=12016

"Make fast/text/stroking-decorations.html and fast/text/stroking.html pass on no-svg build" just repeats the bug's summary, adding the name of another failing test. It's redundant. You could explain the change (HTML tests now print out the stroke width, which is a float, so the precision needs to be set) or just not write anything.

r=me

[David Kilzer (:ddkilzer)]

Committed revision 18459.

[Darin Adler]

<rdar://problem/4897040> no-svg Buildbot crash at WebCore::TextStream::operator<<(float) + 72