[R-pkg-devel] R3.6.0 suppressing S3 overwrite messages

Roy Mendelssohn - NOAA Federal roy@mende|@@ohn @end|ng |rom no@@@gov
Sat May 18 22:34:16 CEST 2019

Thanks again.  I use httr explicitly,  I believe hoardr is used by another package that I use.  I don't think the conflict will cause problems given how I am using them,  but your explanation clarifies what is going on for me to check on.


> On May 18, 2019, at 1:23 PM, Duncan Murdoch <murdoch.duncan using gmail.com> wrote:
> On 18/05/2019 4:03 p.m., Duncan Murdoch wrote:
>> On 18/05/2019 3:42 p.m., Roy Mendelssohn - NOAA Federal via
>> R-package-devel wrote:
>>> My memory is that this was discussed here,  but i can't find the emails, including in the archives ( i did find a similar query from Yihui on r-dev.).  Probably there,  I am just not seeing it.  In the package I am working on for submission,  when I load the package i get:
>> There was a thread about this on R-help, started by Rolf Turner on April
>> 29, subject "Message produced under R 3.6.0.".
>> Users can suppress those messages, but I don't think package writers
>> can:  they indicate true bugs, and the packages mentioned (ggplot2,
>> crul, hoardr in your case) need to be fixed to get rid of them.
> Sorry, that claim isn't correct.  For example, hoardr has a conflict with httr, but it's really a weakness of S3 that is causing this:  they both define things with class "cache_info", and the warning you're seeing is because both have print.cache_info methods.  However, the classes are unrelated.  I think the problem is that R can only have one print.cache_info method active, and you somehow got both hoardr and httr loaded at the same time.
> Either one of them could work around this S3 limitation by changing the name of the class (e.g. to "hoardr_cache_info" or "httr_cache_info"), but I don't think it was fair of me to suggest some flaw in either of those packages for the collision.
> Duncan Murdoch

"The contents of this message do not reflect any position of the U.S. Government or NOAA."
Roy Mendelssohn
Supervisory Operations Research Analyst
Environmental Research Division
Southwest Fisheries Science Center
***Note new street address***
110 McAllister Way
Santa Cruz, CA 95060
Phone: (831)-420-3666
Fax: (831) 420-3980
e-mail: Roy.Mendelssohn using noaa.gov www: http://www.pfeg.noaa.gov/

"Old age and treachery will overcome youth and skill."
"From those who have been given much, much will be expected" 
"the arc of the moral universe is long, but it bends toward justice" -MLK Jr.

More information about the R-package-devel mailing list