CMake project parsing freezes

CMake project parsing freezes if I clicked "CMake Run" in project context menu when previous parsing process in progress.
Current parsing process stops but new not started.

Project parsing working icon has infinite animation:

Message in terminal:

SOFT ASSERT: "!m_reader.isParsing()" in file /home/qt/work/build/qt-creator/src/plugins/cmakeprojectmanager/cmakebuildsystem.cpp, line 239

Steps to reproduce:
1. Click "CMake Run" in project context menu
2. Click again "CMake Run" before parsing process is finished