/* 
this produced an endless-loop:

void Download::getLocks(connIter it, uint64_t chunksize) {
    Detail::UsedRangePtr used = it->used;
    Detail::LockedRangePtr locked = it->locked;

    if (used && !locked) try { // got used, but no lock - try get a lock
        locked = used->getLock(chunksize);
    } catch (...) {       // lock failed - reset used and recurse
        used.reset();
        return getLocks(it, chunksize);
    } else if (!used) try {  // no used - try get new one
        used = m_pd->getRange(chunksize);
        locked.reset();
        return getLocks(it, chunksize); // and recurse, will attempt to lock now
    } catch (...) {            // usedrange failed, bail out
        used.reset();
        locked.reset();
    }
}
*/

void Download::getLocks(connIter it, uint64_t chunksize) {
    logTrace(TRACE, "getLocks()");
    Detail::UsedRangePtr used = it->used;
    Detail::LockedRangePtr locked = it->locked;

    used = m_pd->getRange(chunksize);
    CHECK_THROW(!used);

    locked = used->getLock(chunksize);
    CHECK_THROW(!locked);
}


Trace-log:
...
Trace(HttpDownload): getRandomChunk()
Trace(HttpDownload): doGet()
Trace(HttpDownload): createConnection(http://localhost/test.bin)
Trace(HttpParser): Parser()
Trace(HttpDownload): m_connections.insert(Connection(http://localhost/test.bin, 0x8084940, 0x8066828, 0, 0));
Trace(HttpDownload): getLocks()
Error: doGet failed: hncore/plugins/http/src/download.cpp:210: Check `!used' failed
...