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Serious stability issues affecting Qt 5.6.1 builds #80

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rdumusc opened this issue Aug 19, 2016 · 1 comment
Closed

Serious stability issues affecting Qt 5.6.1 builds #80

rdumusc opened this issue Aug 19, 2016 · 1 comment
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@rdumusc
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rdumusc commented Aug 19, 2016

A segfault may occur in tideMaster's main thread in QV4::QmlContextWrapper::get().
Reproduction steps:

  • Open at least one window (any type)
  • Interact quickly with multiple touch points on the Content + Title bar for a while
  • segfault occurs

Affected Qt versions:

  • 5.6.1
  • 5.6.1-1

Earlier versions which are not affected:

  • 5.4.1
  • 5.5.1

Later version not affected:

segfault_backtrace.txt

@rdumusc rdumusc added the bug label Aug 19, 2016
@rdumusc rdumusc changed the title Serious stability issues affecting Qt 5.6.1 - 5.7.0 builds Serious stability issues affecting Qt 5.6.1 builds Sep 16, 2016
@rdumusc
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rdumusc commented Sep 19, 2016

The refactoring of the MultitouchArea introduced by #84 somehow solved the problem for Qt >= 5.6.
It seems the previous code could lead to an obscure race condition in the QV4 JavaScript engine when changing the State property of the ContentWindow between resizing / moving / none.

@rdumusc rdumusc closed this as completed Sep 19, 2016
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