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Branched from #1076
R core just removed access to a bunch of APIs, just in time to put our new r-devel build (#1076) to good use.
The main change is that we no longer unlock our private namespaces and environments. Instead we wait until they are fully initialised to lock them. In debug builds we never lock them to allow hot-reloading when a .R file changes.
Otherwise we follow what we've been doing in rlang, lobstr, vctrs, and other packages regarding compatibility with C API. E.g. in
zap_srcref()orobj_size(). We use new APIs (with polyfills for old R compats) or new workaround approaches.I've also proactively removed usage of
ATTRIB()andSET_ATTRIB()as well (except in the altrep utils) since these have been promoted from NOTE to WARNING on CRAN.