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  1. Qt
  2. QTBUG-41766

Regression: crash compiling do{} while() loop

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Details

    • b74268ef3e82f0fb9c1ed5392efd0e19c08ee5d5

    Description

      Use of a do() while loop crashes 

      function crash()
{
    var x = -1;
    do {
        if (x >= 1) {
            x = 0;
        }
    } while (x != 0);
}

      5.3 works fine. 5.4 crashes on load.

      Naturally the example above would infinite loop and be rubbish, but it's a simplified version of more legitimate code.

      Attachments

        1. qtbug41766_repro.diff
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        2. qtbug41766_stack.tasks
          2 kB
        3. qtbug41766_stack.txt
          30 kB

        Issue Links

          duplicates

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-42379 Combination of "do { } while" with nested "if" makes QML JIT compiler crash

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-42026 Qmlscene crashes with a simple JavaScript

          • 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
          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-42811 Assertion fails in qv4ssa.cpp

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
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              mapaaso Matti Paaso
              davidedmundson David Edmundson
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              Dates

                Created:
                Updated:
                Resolved:

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