[PATCH] LLDB: Don't crash when creating a SBTarget programmatically

[Michail Pishchagin]

Hi, this is my first patch, hopefully I've done it the right way :-)

I'm automatically attaching to child processes by a custom breakpoint
action written in Python:

def breakpoint_callback(frame, bp_loc, dict):
    old_target = lldb.target
    # If we just use lldb.process here, it won't continue afterwards :-(
    thread = frame.GetThread()
    old_process = thread.GetProcess()

    handle = int(frame.FindVariable("handle").GetValue())
    # After we attach to PID it will automatically switch to correct
executable
    exe = old_target.GetExecutable().fullpath
    new_target = lldb.debugger.CreateTarget(exe)  # <-- crash here

I'm not using any remote sessions, everything is local. And my fix makes it
work correctly.

-Michail
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