LLDB: <built-in function SBProcess_GetSTDOUT> returned NULL without setting an error

When launching the debuger inside Qt Creator, very frequently the following error happens: eSystemError: <built-in function SBProcess_GetSTDOUT> returned NULL without setting an error

When it happens, the debugger will hang when interacting with it in the UI or when hitting a breakpoint. The only solution is to abort the debugger (2 times) and relaunch hoping that the error does not happen again.

lldb version:

=========

lldb-1200.0.44.2, Apple Swift version 5.3.2 (swiftlang-1200.0.45 clang-1200.0.32.28)

Full error:

=======

eERROR: Lldb stderr: Exception in thread Thread-1:
eERROR: Lldb stderr: Traceback (most recent call last):
e File "/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/threading.py", line 932, in _bootstrap_inner
e self.run()
e File "/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/threading.py", line 870, in run
e self._target(*self._args, **self._kwargs)
e File "/opt/packages/qtcreator/4.15/Qt Creator.app/Contents/Resources/debugger/lldbbridge.py", line 1012, in loop
e self.handleEvent(event)
e File "/opt/packages/qtcreator/4.15/Qt Creator.app/Contents/Resources/debugger/lldbbridge.py", line 1427, in handleEvent
eERROR: Lldb stderr: self.handleInferiorOutput(self.process.GetSTDOUT, "stdout")
e File "/opt/packages/qtcreator/4.15/Qt Creator.app/Contents/Resources/debugger/lldbbridge.py", line 1435, in handleInferiorOutput
e msg = proc(1024)
e File "/Applications/Xcode.app/Contents/SharedFrameworks/LLDB.framework/Resources/Python3/lldb/_init_.py", line 8616, in GetSTDOUT
eERROR: Lldb stderr: return _lldb.SBProcess_GetSTDOUT(self, dst)
eSystemError: <built-in function SBProcess_GetSTDOUT> returned NULL without setting an error