Program received signal SIGSEGV, Segmentation fault.                                                                                                                                                                                         
0xb5d12b7a in QTextEngine::itemize (this=<error reading variable: Cannot access memory at address 0xbf7ffc70>) at text/qtextengine.cpp:1503                                                                                                  
1503    text/qtextengine.cpp: No such file or directory.                                                                                                                                                                                     
(gdb) bt                                                                                                                                                                                                                                     
#0  0xb5d12b7a in QTextEngine::itemize (this=<error reading variable: Cannot access memory at address 0xbf7ffc70>) at text/qtextengine.cpp:1503                                                                                              
#1  0xb5d14e0d in QTextEngine::attributes (this=0xbff23d8) at text/qtextengine.cpp:1410                                                                                                                                                      
#2  0xb5d2193d in QTextLine::layout_helper (this=this@entry=0xbf803268, maxGlyphs=maxGlyphs@entry=2147483647) at text/qtextlayout.cpp:1737                                                                                                   
#3  0xb5d23837 in QTextLine::setLineWidth (this=0xbf803268, width=<optimized out>) at text/qtextlayout.cpp:1525                                                                                                                              
#4  0xb5f9c6ed in QPlainTextDocumentLayout::layoutBlock (this=0x87d3270, block=...) at widgets/qplaintextedit.cpp:384                                                                                                                        
#5  0xb5f9cb33 in blockBoundingRect (block=..., this=0x87d3270) at widgets/qplaintextedit.cpp:200                                                                                                                                            
#6  QPlainTextDocumentLayout::blockBoundingRect (this=0x87d3270, block=...) at widgets/qplaintextedit.cpp:195                                                                                                                                
#7  0xb5d6b529 in blockLayout (block=..., this=<optimized out>) at text/qtextcursor.cpp:881                                                                                                                                                  
#8  QTextCursorPrivate::blockLayout (this=0x9077a10, block=...) at text/qtextcursor.cpp:878                                                                                                                                                  
#9  0xbf803410 in ?? ()                                                                                                                                                                                                                      
Backtrace stopped: previous frame inner to this frame (corrupt stack?)