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Code Issues Releases Wiki Activity

fixed possible crash in History::addOlderSlice

This commit is contained in:
John Preston 2016-01-26 14:01:15 +03:00
parent 07c81db79a
commit 62c28cb58b
1 changed files with 4 additions and 5 deletions
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9
Telegram/SourceFiles/history.cpp
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@ -1918,11 +1918,6 @@ void History::addOlderSlice(const QVector<MTPMessage> &slice, const QVector<MTPM
const MTPMessageGroup *groupsBegin = (isChannel() && collapsed) ? collapsed->constData() : 0, *groupsIt = groupsBegin, *groupsEnd = (isChannel() && collapsed) ? (groupsBegin + collapsed->size()) : 0; const MTPMessageGroup *groupsBegin = (isChannel() && collapsed) ? collapsed->constData() : 0, *groupsIt = groupsBegin, *groupsEnd = (isChannel() && collapsed) ? (groupsBegin + collapsed->size()) : 0;
HistoryItem *oldFirst = 0, *last = 0; HistoryItem *oldFirst = 0, *last = 0;
if (!blocks.isEmpty()) {
t_assert(blocks.size() > 1);
oldFirst = blocks.at(1)->items.front();
}
HistoryBlock *block = new HistoryBlock(this); HistoryBlock *block = new HistoryBlock(this);
block->items.reserve(slice.size() + (collapsed ? collapsed->size() : 0)); block->items.reserve(slice.size() + (collapsed ? collapsed->size() : 0));
for (QVector<MTPmessage>::const_iterator i = slice.cend(), e = slice.cbegin(); i != e;) { for (QVector<MTPmessage>::const_iterator i = slice.cend(), e = slice.cbegin(); i != e;) {
@ -1947,6 +1942,10 @@ void History::addOlderSlice(const QVector<MTPMessage> &slice, const QVector<MTPM
last = addMessageGroupAfterPrevToBlock(group, last, block); last = addMessageGroupAfterPrevToBlock(group, last, block);
} }
if (!blocks.isEmpty()) {
t_assert(blocks.size() > 1);
oldFirst = blocks.at(1)->items.front();
}
while (oldFirst && last && oldFirst->type() == HistoryItemGroup && last->type() == HistoryItemGroup) { while (oldFirst && last && oldFirst->type() == HistoryItemGroup && last->type() == HistoryItemGroup) {
static_cast<HistoryGroup*>(last)->uniteWith(static_cast<HistoryGroup*>(oldFirst)); static_cast<HistoryGroup*>(last)->uniteWith(static_cast<HistoryGroup*>(oldFirst));
oldFirst->destroy(); oldFirst->destroy();