[ARM] Need to run debugging session twice when debugging multithreaded application

Here is:
cpptools v0.13.0
VSCode 1.16.1
Windows 8

I use VS Code to develop application for the ARM Cortem-Mx MCUs. When starting debugger with multithreaded application (with OpenOCD threads support) I need to run debugger session twice - first time VS Code drops debugging session. Standalone gdb-OpenOCD session runs flawlessly.

That is not a big problem, cause debugger functions properly after the second start, but it looks like something is broken.

Here is the debug log of the VSCode for the first debugger start:
first.txt

And here is for the second one:
second.txt

Note: when application starts there is no OS running yet, so OpenOCD reports there is a fake thread (thread id 1). This thread terminates on OS start and new real threads created.

The problem may be related to #978 issue.

Inizia confrontando i log di debug allegati first.txt e second.txt, quindi esamina il comportamento descritto per il thread fake di OpenOCD e la issue correlata #978. Riproduci il comportamento del primo e del secondo avvio con un'applicazione ARM multithread e verifica che un avvio del debugger rimanga connesso quando il thread iniziale viene sostituito.