Windows: qdb.exe blocks Qt Creator's working directory from being deleted (even after Qt Creator exit)

Even after Qt Creator exits, qdb.exe holds a handle to the working directory it is (indirectly) launched in. This means one cannot delete the working directory without manually terminating qdb.exe.

How to reproduce

• Make sure you do not have any old instances of qdb.exe running
• Launch cmd.exe

  C:\> mkdir %TMP%\testdir&& cd %TMP%\testdir
  C:\Users\kakoehne\AppData\Local\Temp\testdir> C:\Qt\Tools\QtCreator\bin\qtcreator.exe 
  # (exit Qt Creator again)
  C:\Users\kakoehne\AppData\Local\Temp\testdir> cd .. && rmdir /q /s %TMP%\testdir
  *The process cannot access the file because it is being used by another process.*
  

Analysis

Looking for the cause in Process Explorer, it turns out that qdb.exe continues running, and keeps an open file handle to the working directory: