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Avoid crash in QTextMarkdownWriter::writeBlock() 

The inner loop would go out of bounds whenever it tried to find the end
of a run of spaces in a fragment that contained only spaces.

Fixes: QTBUG-104999
Change-Id: I5dda03b31194fff12f6052c458a0eb85d0be5c2b
Pick-to: 6.2 6.3 6.4 6.4.0
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
bb10
Shawn Rutledge 2022-09-09 22:35:24 +02:00
parent 7927b05b2f
commit 9807c4e5af
1 changed files with 2 additions and 2 deletions
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4
src/gui/text/qtextmarkdownwriter.cpp
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@ -540,13 +540,13 @@ int QTextMarkdownWriter::writeBlock(const QTextBlock &block, bool wrap, bool ign
}
if (wrap && col + markers.length() * 2 + fragmentText.length() > ColumnLimit) {
int i = 0;
int fragLen = fragmentText.length();
const int fragLen = fragmentText.length();
bool breakingLine = false;
while (i < fragLen) {
if (col >= ColumnLimit) {
m_stream << Newline << wrapIndentString;
col = m_wrappedLineIndent;
while (fragmentText[i].isSpace())
while (i < fragLen && fragmentText[i].isSpace())
++i;
}
int j = i + ColumnLimit - col;