segmentation fault after max level of parenthesis (PR#7990)

Full_Name: Matthias Laabs
Version: 2.1.0 (source compiled)
OS: debian linux (sarge)
Submission from: (NULL) (195.143.236.2)


Hi!
R crashes with a segmentation fault when I use more than 85 parenthesis (it
actually happened by accidently hitting a wrong shortcut in emacs ... )

code:
 sum(((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((()


cheers from Berlin,

Matthias