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[Launchpad Bug Tracker <1443981@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package qtdeclarative-opensource-src -
5.4.1-1ubuntu5

---------------
qtdeclarative-opensource-src (5.4.1-1ubuntu5) vivid; urgency=medium

  * debian/patches/Protect-the-RegExp-against-early-garbage-collection.patch
    - Fix a potential random crasher with a fix from upstream (LP: #1443981)
 -- Timo Jyrinki <timo-jyrinki@xxxxxxxxxx>   Wed, 15 Apr 2015 07:19:34 +0000

** Changed in: qtdeclarative-opensource-src (Ubuntu Vivid)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1443981

Title:
  Protect the RegExp against early garbage collection

Status in qtdeclarative-opensource-src package in Ubuntu:
  Fix Released
Status in qtdeclarative-opensource-src source package in Vivid:
  Fix Released

Bug description:
  RegExp is not properly protected against garbage collection and can
  cause a crash depending on when the garbage collection kicks in.

  To reproduce the problem save http://paste.ubuntu.com/10821832/ to file.qml and run
  QV4_MM_AGGRESSIVE_GC=1 qmlscene file.qml

  The fix is accepted upstream at https://codereview.qt-
  project.org/#/c/110411/

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