do.call() mangles expressions in arguments (PR#174)

f<-function(x)x
f(expression(print("Oops")))

expression(print("Oops"))

do.call("f",list(expression(print("Oops"))))

[1] "Oops"

Something in the do_docall code causes an extra eval of the
argument. Causes trouble with math expressions in labels in 
boxplot (do.call("title",...))

--please do not edit the information below--

Version:
 platform = i586-unknown-linux
 arch = i586
 os = linux
 system = i586, linux
 status = Patched (unreleased snapshot)
 status.rev = 0
 major = 0
 minor = 64.0
 year = 1999
 month = April
 day = 22
 language = R

Search Path:
 .GlobalEnv, Autoloads, package:base

-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-devel-request@stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._