[R] why does these warning mean?

[Peng Jiang]

Hi ,

  I don't know whether it is a Mac specific problem. I hope it does  
not bother you.

When I start R each time I got the following warning , I reinstall for  
many times the problem still exists.

  R(4053,0xa0619fa0) malloc: *** error for object 0x15630350: double  
free
*** set a breakpoint in malloc_error_break to debug
R(4053,0xa0619fa0) malloc: *** error for object 0x15630f10: double free
*** set a breakpoint in malloc_error_break to debug
R(4053,0xa0619fa0) malloc: *** error for object 0x15630350: double free
*** set a breakpoint in malloc_error_break to debug
R(4053,0xa0619fa0) malloc: *** error for object 0x15630f60: double free
*** set a breakpoint in malloc_error_break to debug


My sessionInfo() is
  > sessionInfo()
R version 2.7.0 (2008-04-22)
i386-apple-darwin8.10.1

locale:
zh_CN.UTF-8/zh_CN.UTF-8/C/C/zh_CN.UTF-8/zh_CN.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base



--------------------------
Peng Jiang
江鹏
Ph.D. Candidate

Antai College of Economics & Management
安泰经济管理学院
Department of Mathematics
数学系
Shanghai Jiaotong University (Minhang Campus)
800 Dongchuan Road
200240 Shanghai
P. R. China