Index: fix-cursortox-crash.patch
===================================================================
--- fix-cursortox-crash.patch	(revision 0)
+++ fix-cursortox-crash.patch	(arbetskopia)
@@ -0,0 +1,28 @@
+commit cac12f4592477d99ef6fffaad40345bf85ef53b5
+Author: Jiang Jiang <jiang.jiang@nokia.com>
+Date:   Mon Apr 2 12:32:05 2012 +0200
+
+    Fix a crash in cursorToX() when new block is added
+    
+    When an empty new block is being added, the layoutData->memory data
+    will be 0, thus QTextEngine::attributes() will return 0. We should
+    only access the attributes pointer when some text actually exist.
+    
+    Task-number: QTBUG-24718
+    Change-Id: I9ce9f7b57bccf24099a02832ce30fb6cebfaad33
+
+diff --git a/src/gui/text/qtextlayout.cpp b/src/gui/text/qtextlayout.cpp
+index ee658d9..16f7150 100644
+--- a/src/gui/text/qtextlayout.cpp
++++ b/src/gui/text/qtextlayout.cpp
+@@ -2508,6 +2508,10 @@ qreal QTextLine::cursorToX(int *cursorPos, Edge edge) const
+     int pos = *cursorPos;
+     int itm;
+     const HB_CharAttributes *attributes = eng->attributes();
++    if (!attributes) {
++        *cursorPos = 0;
++        return x.toReal();
++    }
+     while (pos < line.from + line.length && !attributes[pos].charStop)
+         pos++;
+     if (pos == line.from + (int)line.length) {
Index: PKGBUILD
===================================================================
--- PKGBUILD	(revision 156051)
+++ PKGBUILD	(arbetskopia)
@@ -5,7 +5,7 @@
 pkgbase=qt
 pkgname=('qt' 'qt-private-headers')
 pkgver=4.8.1
-pkgrel=1
+pkgrel=2
 arch=('i686' 'x86_64')
 url='http://qt-project.org/'
 license=('GPL3' 'LGPL')
@@ -18,18 +18,21 @@
 source=("http://get.qt.nokia.com/qt/source/${_pkgfqn}.tar.gz"
         'assistant.desktop' 'designer.desktop' 'linguist.desktop'
         'qtconfig.desktop'
-        'gcc47.patch')
+        'gcc47.patch'
+        'fix-cursortox-crash.patch')
 md5sums=('7960ba8e18ca31f0c6e4895a312f92ff'
          'fc211414130ab2764132e7370f8e5caa'
          '85179f5e0437514f8639957e1d8baf62'
          'f11852b97583610f3dbb669ebc3e21bc'
          '6b771c8a81dd90b45e8a79afa0e5bbfd'
-         'd8a0e81075b290ddc18ecd33b9b7ee22')
+         'd8a0e81075b290ddc18ecd33b9b7ee22'
+         'bec6ed42e4bf501f1b6c150df00e65b7')
 
 build() {
   cd "${srcdir}"/${_pkgfqn}
 
   patch -p1 -i "${srcdir}"/gcc47.patch
+  patch -p1 -i "${srcdir}"/fix-cursortox-crash.patch
 
   export QT4DIR="${srcdir}"/${_pkgfqn}
   export LD_LIBRARY_PATH=${QT4DIR}/lib:${LD_LIBRARY_PATH}