[R-SIG-Mac] data.table fails to load on R-4.6-x86_64

[Prof Brian Ripley]

On 16/03/2026 12:57, Duncan Murdoch wrote:
> On 2026-03-16 8:23 a.m., Jeroen Ooms wrote:
>> Using the latest CRAN binary:
>> https://cloud.r-project.org/bin/macosx/big-sur-x86_64/contrib/4.6/ 
>> data.table_1.18.2.1.tgz
>>
>> We get
>>
>> unable to load shared object
>> '/Library/Frameworks/R.framework/Versions/4.6-x86_64/Resources/ 
>> library/data.table/libs/data_table.so':
>> dlopen(/Library/Frameworks/R.framework/Versions/4.6-x86_64/Resources/ 
>> library/data.table/libs/data_table.so,
>> 0x0006): Symbol not found: _IS_GROWABLE

We weren't told precisely what version of R was used ... pace the 
posting guide.

> It loads for me on my slightly out of date system:
> 
> R version 4.5.2 (2025-10-31)
> Platform: aarch64-apple-darwin20
> Running under: macOS Sequoia 15.7.4

Note he has '4.6' hence for R-devel, not 4.5.x.

The exported entry points in R-devel have been under rapid change, the 
most pervasive of which were rolled back temporarily (but are expected 
to reappear before 4.6.0 is released).

Most of the binary packages at

https://cran.r-project.org/bin/macosx/big-sur-x86_64/contrib/4.6/

are months old, including the data.table one.

I would expect to have to install packages using compiled code from 
source on R-devel, maybe frequently.


-- 
Brian D. Ripley,                  ripleybd using icloud.com
Emeritus Professor of Applied Statistics, University of Oxford