I think at least a warning is appropriate here (and also for a URL), so
have modified the code to have one in each case.
There is a reason why the chdir code is later, after the parsing, for it
was thought more important to get an error from parsing than from failing
to chdir.
On Tue, 19 Jul 2
For R v2.1.1 patched and R v2.2.0 devel:
Calling source(file, chdir=TRUE) with is.character(file) != TRUE, that
is, with 'file' as a connection, will generate an error. Example:
> file <- textConnection("cat('Hello world\n')")
> source(file, chdir=TRUE)
Error in source(file, chdir = TRUE) : Ob
