GDB exits while debugging

This started after the update to Qt Creator 4.7.2.

GDB exits while debugging a C++ application. There are no error messages. The only message in the Application Output is:

Debugging has finished

The first two or three debug sessions work without problems. Then in the next sessions GDB exists randomly, either while stepping or while stopping in a breakpoint or when simply continuing.

Restart Qt Creator and it works again for the first two or three sessions.

The issue doesn't happen when starting GDB stand alone.

This was not happening with Qt Creator 4.7.1

The memory size for the qtcreator process (reported by System Monitor) increases between every debug session: starts with 756 Mib in the first session, then 759 Mib, 773 Mib, 784 Mib, and so on.

Update:

Run Qt Creator from terminal and got the following output (4 debug sessions, the last 2 ended abruptly)

TOKEN: 33 CMD: "-break-delete 1"
SOFT ASSERT: "good" in file /work/build/qt-creator/src/plugins/debugger/gdb/gdbengine.cpp, line 2061
Invalid run control state transition from "RunControlState::Stopped" to "RunControlState::Starting"
SOFT ASSERT: "m_currentIndex < m_stackFrames.size()" in file /work/build/qt-creator/src/plugins/debugger/stackhandler.cpp, line 190
SOFT ASSERT: "m_currentIndex < m_stackFrames.size()" in file /work/build/qt-creator/src/plugins/debugger/stackhandler.cpp, line 190
Invalid run control state transition from "RunControlState::Stopped" to "RunControlState::Starting"
SOFT ASSERT: "m_currentIndex < m_stackFrames.size()" in file /work/build/qt-creator/src/plugins/debugger/stackhandler.cpp, line 190
SOFT ASSERT: "m_currentIndex < m_stackFrames.size()" in file /work/build/qt-creator/src/plugins/debugger/stackhandler.cpp, line 190
Invalid run control state transition from "RunControlState::Stopped" to "RunControlState::Starting"
SOFT ASSERT: "m_currentIndex < m_stackFrames.size()" in file /work/build/qt-creator/src/plugins/debugger/stackhandler.cpp, line 190
SOFT ASSERT: "m_currentIndex < m_stackFrames.size()" in file /work/build/qt-creator/src/plugins/debugger/stackhandler.cpp, line 190
Invalid run control state transition from "RunControlState::Stopped" to "RunControlState::Starting"
SOFT ASSERT: "m_currentIndex < m_stackFrames.size()" in file /work/build/qt-creator/src/plugins/debugger/stackhandler.cpp, line 190
SOFT ASSERT: "m_currentIndex < m_stackFrames.size()" in file /work/build/qt-creator/src/plugins/debugger/stackhandler.cpp, line 190