QtCreator eating all the memory while indexing, then crashing

When I opened one of my projects, QtCreator did an Analyze (successfull) and then started Indexing.
The indexing progress bar stayed empty, and QtCreator ate up the memory very fast.
After 10-15 seconds, the system became totally unresponsive and had to be reseted.

I tried removing all documentations from the QtCreator help configuration, the result was the same.

I then tried to grow the memory to 1.5GB.
The system responded again after a good minute, when QtCreator crashed.
In the Windows Task Manager, I saw then that at the time of the crash, the peak memory of QtCreator was 1.1 GB and the current used memory 50 MB.

The Windows problem details were:

Problem signature:
  Problem Event Name:	APPCRASH
  Application Name:	qtcreator.exe
  Application Version:	0.0.0.0
  Application Timestamp:	4b5266a3
  Fault Module Name:	CPlusPlus.dll
  Fault Module Version:	0.0.0.0
  Fault Module Timestamp:	4b52669f
  Exception Code:	c0000005
  Exception Offset:	0002d583
  OS Version:	6.1.7600.2.0.0.256.1
  Locale ID:	1036
  Additional Information 1:	6159
  Additional Information 2:	6159b45a555b2ff07c222bd5a42c6120
  Additional Information 3:	216c
  Additional Information 4:	216cc2d3bf907a9b9a5b2d45cdc6ca0a

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When I clicked on "Debug the program", Visual Studio 2008 could not attach to qtcreator.exe, so I don't have more details.

Note: I'm not sure it it's linked, but this bug happens when opening the project for which the bug QTCREATORBUG-849 occured.
On the command prompt, I did

qmake
nmake
nmake distclean

Then I deleted all the generated files (debug, release folders, moc, ui and qrc files), started QtCreator and opened the project. The problem remains.