I am trying to build R-devel on Darwin with two-level namespaces
and without using --bundle_loader path/to/R.bin, so that all symbols
must come from libR.dylib. This goes well, until during the methods
package build all.rda must be made from all.R. Then I get
dumping R code in package 'methods'
Error: Object "dataClass" not found
Execution halted
I can get past this point by copying an old all.rda from 1.6.2
to library/methods/R, but not surprisingly (!!) I then get into trouble
when trying to start R.