Find References to Symbol Under Cursor does not find all of them

To reproduce:

1. Load Creator master branch into Creator.
2. Open consoleprocess.cpp, line 102, and do "Find References to Symbol Under Cursor" for m_process.
3. As a result I get only 2 hits (line 102 and 128), while other occurrences (e.g. 593, 594, 595 and so on) are missing.