Methods in recommended packages are not found

[danno11]

I'm not sure if this is a real issue or if I'm not using the package correctly, but the C-code referenced in .Call() doesn't seem to be looked up. For example:

lookup(stats::cor) doesn't give C code from
.Call(C_cor)

lookup(stats::lm.fit) doesn't give the C code from :
.Call(C_Cdqrls, x, y, tol, FALSE)

[jimhester]

I think this is because recommended packages like stats are not on CRAN (and therefore not in the CRAN GitHub mirror). They would need to be special cased.