Strange QByteArray mismatch

[giusepped]

I use zlib to decompress gzip data from http responses.
Sometimes it does work.
I have this piece of code (buffers is a a QHash of QByteArray to make buffering):

....
                              buffers.value(host)->append(data);
                              qDebug()<<"SOCKET FLUSH-----------------"<<
                                      proxySocket->property("flush")<<
                                      proxySocket->property("current-length")<<
                                      proxySocket->property("length")<<buffers<<
                                      buffers.value(host)->isEmpty();
                              // did we buffer?
 
                              if (!buffers.value(host)->isEmpty())
                                  {
 
                                  content = QByteArray(buffers.value(host)->data());
                                  qDebug()<<"FLUSHED BUFFER-------"<<content;
                                  }
                            compressed = decompress(content);

....
                              buffers.value(host)->append(data);
                              qDebug()<<"SOCKET FLUSH-----------------"<<
                                      proxySocket->property("flush")<<
                                      proxySocket->property("current-length")<<
                                      proxySocket->property("length")<<buffers<<
                                      buffers.value(host)->isEmpty();
                              // did we buffer?

                              if (!buffers.value(host)->isEmpty())
                                  {

                                  content = QByteArray(buffers.value(host)->data());
                                  qDebug()<<"FLUSHED BUFFER-------"<<content;
                                  }
                            compressed = decompress(content);

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In the output I have:

SOCKET FLUSH----------------- QVariant(, ) QVariant(int, 2262) QVariant(int, 2262) QHash(("", 0x47a68c0)

SOCKET FLUSH----------------- QVariant(, ) QVariant(int, 2262) QVariant(int, 2262) QHash(("", 0x47a68c0)

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but the size of compressed is 0! How is it possible? I have 2262 byte in content, why the decompression does not work? Also if I print the size of content at the end of the code, it is lower than the size of the buffer, e.g. 2262

---

Added after 8 minutes:

First, I found that data() is not the correct way to pass the data, because data() returns a char*, a pointer.

content = QByteArray(*buffers.value(host));

content = QByteArray(*buffers.value(host));

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This is right.