Created attachment 1280420 [details]
Patch to qt-creator.spec to require python-lldb

Description of problem:
Debugging won't start if LLDB is used as the debugger.

Version-Release number of selected component (if applicable):
4.1.0-2.fc25.2 
The bug may be present in other Fedora versions. I've only tested with 25.

How reproducible: Always

Steps to Reproduce:
1. Create a project and set debugger to LLDB 
2. Start debugging

Actual results:
"Debugging starts" is displayed, but the process to be debugged is not launched and no further feedback is given, unless you view the debugger log, where you see the following:

ERROR: Lldb stderr: Traceback (most recent call last):
  File "<string>", line 1, in <module>

ERROR: Lldb stderr: ImportError: No module named lldb.embedded_interpreter
Traceback (most recent call last):
  File "<string>", line 1, in <module>
NameError: name 'run_one_line' is not defined
Traceback (most recent call last):
  File "<string>", line 1, in <module>
NameError: name 'run_one_line' is not defined
Traceback (most recent call last):
  File "<string>", line 1, in <module>
NameError: name 'run_one_line' is not defined
Traceback (most recent call last):
  File "<string>", line 1, in <module>
NameError: name 'run_one_line' is not defined
Traceback (most recent call last):
  File "<string>", line 1, in <module>
NameError: name 'run_one_line' is not defined
Traceback (most recent call last):
  File "<string>", line 1, in <module>
NameError: name 'run_one_line' is not defined

ERROR: Lldb stderr: error: python failed attempting to evaluate 'print('@\nlldbstartupok@\n')'

Expected results:
Debugging begins successfully.

Additional info:
The solution is to install package 'python-lldb'. Attaching a proposed (untested) patch to qt-creator.spec.