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Bug 368860. Don't perform out-of-bounds access if we have a bogus empty previous-text-frame. r+sr=dbaron

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roc+@cs.cmu.edu 2007-04-03 19:28:27 -07:00
parent 9d118160b7
commit f1007b83a5
1 changed files with 5 additions and 2 deletions
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7
layout/generic/nsTextFrame.cpp
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@ -4996,9 +4996,12 @@ static PRBool CanBreakBetween(nsTextFrame* aBefore,
firstAfter = fragAfter->CharAt(afterOffset);
}
while (IS_DISCARDED(lastBefore)) {
NS_ASSERTION(beforeOffset > 0,
"Before-textframe maps no content, should not have called SetTrailingTextFrame");
--beforeOffset;
if (beforeOffset == 0) {
// aBefore was entirely skipped. Who knows why it called SetTrailingTextFrame.
NS_WARNING("Before-frame should not have called SetTrailingTextFrame");
return PR_FALSE;
}
lastBefore = fragBefore->CharAt(beforeOffset - 1);
}