Uploaded image for project: 'Qt'
  1. Qt
  2. QTBUG-56255

Malformed expression crashes JS optimizer

    XMLWordPrintable

Details

    Description

      Run qtqtuickcompiler on the attached file:

      ./qtquickcompiler -s /tmp/000000.qml /dev/null

      It will crash:

      1 (anonymous namespace)::optimizeSSA     qv4ssa.cpp          4030 0x59e49c 
2 QV4::IR::Optimizer::run                qv4ssa.cpp          5410 0x5e34a6 
3 QmlC::InstructionSelection::run        isel.cpp            190  0x40fafb 
4 QV4::EvalInstructionSelection::compile qv4isel_p.cpp       82   0x4e2350 
5 compileQmlFile                         qtquickcompiler.cpp 119  0x43a8f8 
6 main                                   main.cpp            462  0x40c04c

      qtquickcompiler might not be able to generate valid C++ from this file, but it should never crash.

      Attachments

        1. 000000.qml
          0.3 kB
        2. backtrace.txt
          16 kB

        Issue Links

          duplicates

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-57985 Unused JS conditional var in unused function crashes QQmlEngine

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
          For Gerrit Dashboard: QTBUG-56255
          # Subject Branch Project Status CR V
          117248,1 0,0 slice problem fixed develop qt/qtdatavis3d Status: MERGED +2 0
          177452,2 Improved robustness of the optimizer when removing expressions 5.6 qt/qtdeclarative Status: MERGED +2 0

          Activity

            People

              shausman Simon Hausmann
              rlohning Robert Löhning
              Votes:
              0 Vote for this issue
              Watchers:
              4 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved:

                Gerrit Reviews

                  There are no open Gerrit changes