This looks like a good change, thank you for coming up with it.  Could you put 
the statements on separate lines from the conditional expressions?  Instead of

if (!m_exe_ctx.HasTargetScope()) result.AppendError 
(GetInvalidTargetDescription());

more like this -

if (!m_exe_ctx.HasTargetScope()) 
    result.AppendError (GetInvalidTargetDescription());

or

if (!m_exe_ctx.HasTargetScope())
{
    result.AppendError (GetInvalidTargetDescription());
}

(in this case I think not using the braces will look cleaner).  I know we have 
a few examples of the if (cond) stmt; in lldb already but they are something we 
need to clean up at some point.

J


> On Sep 16, 2014, at 10:06 PM, Paul Osmialowski <[email protected]> wrote:
> 
> Many times during my recent activities I saw invalid frame error message. I 
> found it totally useless - it does not give any clue why the error happened. 
> It turned out that it can occur due to obvious reasons: no target selected, 
> no process launched etc. With this patch it is easier to guess root cause of 
> this error and save hours of unnecessary investigation.
> 
> http://reviews.llvm.org/D5374
> 
> Files:
>  source/Interpreter/CommandObject.cpp
> <D5374.13769.patch>_______________________________________________
> lldb-commits mailing list
> [email protected]
> http://lists.cs.uiuc.edu/mailman/listinfo/lldb-commits

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