https://bugs.kde.org/show_bug.cgi?id=439492
Bug ID: 439492
Summary: TextCreator::create() crashes in QSyntaxHighligher.
Product: kio-extras
Version: unspecified
Platform: Compiled Sources
OS: All
Status: REPORTED
Severity: crash
Priority: NOR
Component: Thumbnails and previews
Assignee: plasma-b...@kde.org
Reporter: rjvber...@gmail.com
Depends on: 439491
Target Milestone: ---
SUMMARY
TextCreator::create() creates a locate instance using
`KSyntaxHighlighting::SyntaxHighlighter syntaxHighlighter;` which leads to a
nullptr dereference in `QSyntaxHighlighter::QSyntaxHighlighter(QObject*)`.
STEPS TO REPRODUCE
1. Open a directory in Dolphin, activate hover-on previews
2. Hover the cursor over a .txt file
OBSERVED RESULT
kdeinit5 crashes because of the nullptr dereference.
EXPECTED RESULT
No crash.
SOFTWARE/OS VERSIONS
Happens on Mac & Linux; as far as I can tell this should happen with the
current Qt5 release and the most recent versions of kio-extras and
KSyntaxHighlighting.
ADDITIONAL INFORMATION
The function should call `KSyntaxHighlighting::SyntaxHighlighter
syntaxHighlighter(&textDocument);` which makes the later call to
`setDocument()` unnecessary.
Referenced Bugs:
https://bugs.kde.org/show_bug.cgi?id=439491
[Bug 439491] SyntaxHighlighter::SyntaxHighlighter(QObject*) should NOT use a
default nullptr
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