Will check as soon as I will get back to the computer.
Meanwhile, I am thinking: can it be related to username? The Windows user name where I have this error is Ştefan (U+015E Latin Capital Letter S With Cedilla). Maybe there is some IPC code that does not translate correctly between unicode and ANSI, fails to compose some string etc. ? Can this be a cause?
"The only thing after crash that appears is an empty debug.log file"
The debug.log obtained last time is empty. The content of the first one is in the comment #1.
What does it means the whole log? I specified in the comment #2 there is no log among those asked in comment #1.
Is there any other log file you want me to attach here?
The issue still persist with the latest downloaded launcher from your website.
About your comments:
There is no subdirectory crash-reports/ nor launcher_log.txt file.
The only thing after crash that appears is an empty debug.log file (created by libcef.dll), in the installation directory (tested just now with default installation in D:\Minecraft, downloaded Java for Windows version 1,14,0).
Versions:
Launcher 2.1.5964 (2d12ae3b04458774a644a7bb7a3745a624f3ce46)
Bootstrap 601 (eb0baaa31a32c94aa60c82dca8abf285b476f18c)
UI 1314 (373b9dfcd01a47d4a56a375fc8698326d8398671)
The option for automatic sending crash reports to Mojang is activated. You should see the uploaded crash files on your server.
I suggest you to reopen the issue, or to pinpoint me perhaps to some custom options that might help. I would try to run this under WinDBG, but not having the PDB symbols (or the crash being inside Java VM which I have no experience with) limits me on showing at least a meaningful callstack.
I am confirming the username renaming from Ştefan to stefan fixes the issue.
So I guess Minecraft should consider using SIDs instead of usernames, or Unicode for handling paths.