Bug 116861

SVN -r 460545 crashes (3.5rc1 too). 
khtml (render): Widows: 1
khtml (render): Widows: 1
khtml (render): Widows: 1

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1208084096 (LWP 20859)]
0x087b5e9f in _int_malloc () from /lib/tls/libc.so.6
(gdb) bt
#0  0x087b5e9f in _int_malloc () from /lib/tls/libc.so.6
#1  0x087b7f01 in malloc () from /lib/tls/libc.so.6
#2  0x00d23357 in operator new () from /usr/lib/libstdc++.so.6
#3  0x0560ac0e in QGArray::newData () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#4  0x0560ad2b in QGArray::QGArray$base ()
   from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#5  0x055fd4fe in QCString::QCString () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#6  0x002fdece in KEntry (this=0xbf4001b0) at ../../kdecore/kconfigdata.h:36
#7  0x00f85816 in KConfig::lookupData (this=0x8dfec18, _key=@0xbf4001c0)
    at kconfig.cpp:250
#8  0x00f7e3a3 in KConfigBase::readEntryUtf8 (this=0x8dfec18,
    pKey=0x92e3200 "InfoOutput") at kconfigbase.cpp:324
#9  0x00f7f740 in KConfigBase::readNumEntry (this=0x8dfec18,
    pKey=0x92e3200 "InfoOutput", nDefault=2) at kconfigbase.cpp:586
#10 0x00f7f6fc in KConfigBase::readNumEntry (this=0x8dfec18, pKey=@0xbf401300,
    nDefault=2) at kconfigbase.cpp:581
#11 0x00f6ebd3 in kDebugBackend (nLevel=0, nArea=6040,
    data=0x92e3188 "Widows: 1\n") at kdebug.cpp:241
#12 0x00f6f418 in kdbgstream::flush (this=0xbf4014c0) at kdebug.cpp:336
#13 0x009abd87 in kdbgstream::operator<< (this=0xbf4014c0,
    string=0x9cef29 "\n") at /opt/kde35b1/include/kdebug.h:232
#14 0x009abdc1 in endl (s=@0xbf4014c0) at /opt/kde35b1/include/kdebug.h:430
#15 0x009abbfe in kdbgstream::operator<< (this=0xbf4014c0,
    f=0x9abd9c <endl(kdbgstream&)>) at /opt/kde35b1/include/kdebug.h:260
#16 0x05c7e471 in khtml::RenderBlock::layoutInlineChildren (this=0x92354ec,
    relayoutChildren=true, breakBeforeLine=0) at bidi.cpp:1559
#17 0x05c7e54d in khtml::RenderBlock::layoutInlineChildren (this=0x92354ec,
    relayoutChildren=true, breakBeforeLine=0) at bidi.cpp:1571
#18 0x05c7e54d in khtml::RenderBlock::layoutInlineChildren (this=0x92354ec,
    relayoutChildren=true, breakBeforeLine=0) at bidi.cpp:1571
#19 0x05c7e54d in khtml::RenderBlock::layoutInlineChildren (this=0x92354ec,
    relayoutChildren=true, breakBeforeLine=0) at bidi.cpp:1571
#20 0x05c7e54d in khtml::RenderBlock::layoutInlineChildren (this=0x92354ec,
    relayoutChildren=true, breakBeforeLine=0) at bidi.cpp:1571
#21 0x05c7e54d in khtml::RenderBlock::layoutInlineChildren (this=0x92354ec,
    relayoutChildren=true, breakBeforeLine=0) at bidi.cpp:1571
#22 0x05c7e54d in khtml::RenderBlock::layoutInlineChildren (this=0x92354ec,
    relayoutChildren=true, breakBeforeLine=0) at bidi.cpp:1571

It runs out of stack space here, dumping out "Widows:1"... Reporter: I guess you don't have any ulimit on stack size?

*** Bug 116881 has been marked as a duplicate of this bug. ***

I did not have any ulimit set. When I do restrict the process virtual memory size, I get a segfault. So I think that the same thing is happening. It's just that in your system it terminated after running out of stack space, whereas on mine it just kept consuming system memory.

*** Bug 116949 has been marked as a duplicate of this bug. ***

*** Bug 87008 has been marked as a duplicate of this bug. ***

*** Bug 118198 has been marked as a duplicate of this bug. ***

*** Bug 118630 has been marked as a duplicate of this bug. ***

*** Bug 119016 has been marked as a duplicate of this bug. ***

*** Bug 119551 has been marked as a duplicate of this bug. ***

Here's another case. This one's a very simple page.
http://llvm.cs.uiuc.edu/docs/Stacker.html

I was able to print two very similar documents from the same documentation set even though they were longer.

Same problem occurs on

http://www.rtd-denver.com/Routes/Route16/016Weekdays.html

(kde 3.5.0 on i386 centos 3.6)

SVN commit 497616 by carewolf:

Don't attempt to break before the first line in a text-run
BUG:116861


 M  +7 -2      bidi.cpp  


--- branches/KDE/3.5/kdelibs/khtml/rendering/bidi.cpp #497615:497616
@@ -834,7 +834,11 @@
             box = box->prevLineBox();
         }
 
-        if (orphans < style()->orphans()) {
+        if (orphans == 0) {
+            setNeedsPageClear(true);
+            doPageBreak = false;
+        } else
+        if (orphans < style()->orphans() ) {
 #ifdef PAGE_DEBUG
             kdDebug(6040) << "Orphans: " << orphans << endl;
 #endif
@@ -1555,7 +1559,8 @@
                 widows++;
             lineBox = lineBox->nextLineBox();
         }
-        if (widows < style()->widows()) {
+        // Widows rule broken and more orphans left to use
+        if (widows < style()->widows() && orphans > 0) {
             kdDebug( 6040 ) << "Widows: " << widows << endl;
             // Check if we have enough orphans after respecting widows count
             int newOrphans = orphans - (style()->widows() - widows);

*** Bug 120230 has been marked as a duplicate of this bug. ***

*** Bug 120879 has been marked as a duplicate of this bug. ***