Well, I know nothing about the R GUI code, but it looks like the issue might be 
in either -[RScriptEditorTypeSetter actionForControlCharacterAtIndex:] or 
-[NoodleLineNumberView drawHashMarksAndLabelsInRect:].  The backtrace is a bit 
odd; I don’t know what sigactionSegv and -[RController handleReadConsole:] are 
doing in the middle of it.  Anyway, this looks like quite a useful backtrace to 
me!  :->

Cheers,
-B.


> On Jun 28, 2020, at 12:25 PM, Brandon Hurr <brandon.h...@gmail.com> wrote:
> 
> Thanks Ben. 
> 
> I fired up R did a 20 second sample as I loaded files and it went into a 
> hang. 
> https://gist.github.com/bhive01/77ccd888da1ee74da12a5c91cfc3d727 
> <https://gist.github.com/bhive01/77ccd888da1ee74da12a5c91cfc3d727>
> 
> Seems to have the symbols you describe. Is that more helpful?
> 
> Brandon


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