Bug 16136

Summary: adding recursive attribute to an name and printing it leads to crash
Product: R Reporter: Frank Schwidom <schwidom>
Component: Low-levelAssignee: R-core <R-core>
Status: NEW ---    
Severity: enhancement    
Priority: P5    
Version: R 3.0.2   
Hardware: All   
OS: AIX   

Description Frank Schwidom 2015-01-06 14:17:56 UTC
> na <- as.name( 'a')
> attr( na, 'na') <- na
> na


 *** caught segfault ***
address 0xff018ffc, cause 'memory not mapped'

Possible actions:
1: abort (with core dump, if enabled)
2: normal R exit
3: exit R without saving workspace
4: exit R saving workspace



adding attributes to names should be forbidden, because 
of the global effect of this operation.


if attaching attributes to names it could be only 
take effect in local environments. the printing
routine should then recognize the recursion and
print labels like "reader-macros" in common lisp.