Segfault when printing a copy of symbolic object

[jpflori]

See:  http://groups.google.com/group/sage-support/browse_thread/thread/ea1de9abbd6ca23d/ce3ed9f17c96bd81#ce3ed9f17c96bd81

Sage segfaults when printing a copy of something symbolics :

 sage: copy(x) 

------------------------------------------------------------ 
 Unhandled SIGSEGV: A segmentation fault occurred in Sage. 
 This probably occurred because a *compiled* component 
 of Sage has a bug in it (typically accessing invalid memory) 
 or is not properly wrapped with _sig_on, _sig_off. 
 You might want to run Sage under gdb with 'sage -gdb' to debug this. 
 Sage will now terminate (sorry). 
 ------------------------------------------------------------

This does not happen with "deepcopy":

sage: deepcopy(x)
x

[jpflori]

Duplicated and hopefully fixed in #10099.