Duncan
Thanks for responding -- but your response did not help my mood.
Executing:
.Call("_systemfonts_system_fonts_c")
triggered the segfault (as you proposed).
Dennis
Dennis Fisher MD
P < (The "P Less Than" Company)
Phone / Fax: 1-866-PLessThan (1-866-753-7784)
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> On Nov 3, 2020, at 1:00 PM, Duncan Murdoch <murdoch.dun...@gmail.com> wrote:
>
> On 03/11/2020 3:43 p.m., Dennis Fisher wrote:
>> R 4.0.3
>> OS X 10.15.7
>> Colleagues
>> When I run flextable, it generates a segfault. I traced the problem to
>> systemfonts::system_fonts()
>>>> require("systemfonts")
>>> Loading required package: systemfonts
>>>> system_fonts()
>>>
>>> *** caught segfault ***
>>> address 0x0, cause 'memory not mapped'
>>>
>>> Traceback:
>>> 1: system_fonts_c()
>>> 2: system_fonts()
>>>
>>> Possible actions:
>>> 1: abort (with core dump, if enabled)
>>> 2: normal R exit
>>> 3: exit R without saving workspace
>>> 4: exit R saving workspace
>>>
>> I updated my OS and R, deleted and reinstalled the systemfonts package --
>> problem persists.
>> I also opened Apple's font application and "validated" all font files (I
>> have never installed any special fonts nor is there anything non-standard
>> (e.g., Homebrew) on my system.
>> Of note, I can run other functions in systemfonts without problems -- only
>> system_fonts triggers the segfault.
>> Another similar setup on OS X does not trigger the same problem, so the
>> problem is more likely something in my system rather than a problem in R.
>> Does anyone have any ideas on how one might address this?
>
> For what it's worth, I have the same R version and macOS version, and it
> works fine. Debugging it will be hard: all the work happens in a function
> called using
>
> .Call("_systemfonts_system_fonts_c")
>
> If I could reproduce the bug and wanted to track it down, I think I'd do it
> by adding a bunch of Rprintf() commands into the source of
> _systemfonts_system_fonts_c and rebuilding the package. It would be really
> tedious; I'm glad I'm not doing this!
>
> Duncan Murdoch
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