[Bug python/16470] Crash when inspecting STL containers with GDB pretty print

["qiyao at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=16470

--- Comment #3 from Yao Qi <qiyao at gcc dot gnu.org> ---
I can't reproduce it on GDB 7.6, 7.6.1 and mainline on X86-Fedora16. :(

$ ./gdb -i mi --data-directory=./data-directory/                                
=thread-group-added,id="i1"                                                     
~"GNU gdb (GDB) 7.6\n"
~"Copyright (C) 2013 Free Software Foundation, Inc.\n"                          
~"License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>\nThis is free software: you are free to
change and redistribute it.\nThere is NO WARRANTY, to the extent permitted by
law.  Type \"show copying\"\nand \"show warranty\" for details.\n"              
~"This GDB was configured as \"i686-pc-linux-gnu\".\nFor bug reporting
instructions, please see:\n"                                                    
~"<http://www.gnu.org/software/gdb/bugs/>.\n"                                   
(gdb)                                                                           
set print pretty on                                                             
&"set print pretty on\n"                                                        
=cmd-param-changed,param="print pretty",value="on"                              
^done                                                                           
(gdb)                                                                           
set print object on                                                             
&"set print object on\n"                                                        
=cmd-param-changed,param="print object",value="on"                              
^done                                                                           
(gdb)                                                                           
set print static-members on                                                     
&"set print static-members on\n"                                                
^done                                                                           
(gdb)                                                                           
set print vtbl on                                                               
&"set print vtbl on\n"                                                          
=cmd-param-changed,param="print vtbl",value="on"                                
^done                                                                           
(gdb)                                                                           
set print demangle on                                                           
&"set print demangle on\n"                                                      
^done                                                                           
(gdb)                                                                           
set demangle-style gnu-v3                                                       
&"set demangle-style gnu-v3\n"                                                  
=cmd-param-changed,param="demangle-style",value="gnu-v3"                        
^done                                                                           
(gdb)                                                                           
-enable-pretty-printing                                                         
^done                                                                           
(gdb)                                                                           
-gdb-set print object on                                                        
^done                                                                           
(gdb)                                                                           
source /tmp/1.txt                                                               
&"source /tmp/1.txt\n"                                                          
^done                                                                           
(gdb)                                                                           
-file-exec-and-symbols --thread-group i1 /tmp/1.exe                             
^done                                                                           
(gdb)                                                                           
-break-insert --thread-group i1 -f /tmp/1.cc:12                                 
^done,bkpt={number="1",type="breakpoint",disp="keep",enabled="y",addr="0x0804863e",func="main()",file="1.cc",fullname="/tmp/1.cc",line="12",thread-groups=["i1"],times="0",original-location="/tmp/1.cc:12"} 
(gdb)                                                                           
-break-insert --thread-group i1 -t -f main                                      
^done,bkpt={number="2",type="breakpoint",disp="del",enabled="y",addr="0x080485ee",func="main()",file="1.cc",fullname="/tmp/1.cc",line="6",thread-groups=["i1"],times="0",original-location="main"} 
(gdb)                                                                           
-exec-run --thread-group i1                                                     
=thread-group-started,id="i1",pid="11180"                                       
=thread-created,id="1",group-id="i1"                                            
^running
*running,thread-id="all"
(gdb) 
=library-loaded,id="/lib/ld-linux.so.2",target-name="/lib/ld-linux.so.2",host-name="/lib/ld-linux.so.2",symbols-loaded="0",thread-group="i1"
=library-loaded,id="/usr/lib/libstdc++.so.6",target-name="/usr/lib/libstdc++.so.6",host-name="/usr/lib/libstdc++.so.6",symbols-loaded="0",thread-group="i1"
=library-loaded,id="/lib/libm.so.6",target-name="/lib/libm.so.6",host-name="/lib/libm.so.6",symbols-loaded="0",thread-group="i1"
=library-loaded,id="/lib/libgcc_s.so.1",target-name="/lib/libgcc_s.so.1",host-name="/lib/libgcc_s.so.1",symbols-loaded="0",thread-group="i1"
=library-loaded,id="/lib/libc.so.6",target-name="/lib/libc.so.6",host-name="/lib/libc.so.6",symbols-loaded="0",thread-group="i1"
=breakpoint-modified,bkpt={number="2",type="breakpoint",disp="del",enabled="y",addr="0x080485ee",func="main()",file="1.cc",fullname="/tmp/1.cc",line="6",thread-groups=["i1"],times="1",original-location="main"}
*stopped,reason="breakpoint-hit",disp="del",bkptno="2",frame={addr="0x080485ee",func="main",args=[],file="1.cc",fullname="/tmp/1.cc",line="6"},thread-id="1",stopped-threads="all",core="2"
=breakpoint-deleted,id="2"
(gdb) 
-var-create --thread-group i1 - * x
^done,name="var1",numchild="0",value="{...}",type="std::list<int,
std::allocator<int> >",thread-id="1",dynamic="1",has_more="1"
(gdb) 
-var-create --thread 1 --frame 0 - * x
^done,name="var2",numchild="0",value="{...}",type="std::list<int,
std::allocator<int> >",thread-id="1",dynamic="1",has_more="1"
(gdb) 
-var-list-children var2
^done,numchild="3",children=[child={name="var2.[0]",exp="[0]",numchild="0",type="int",thread-id="1"},child={name="var2.[1]",exp="[1]",numchild="0",type="int",thread-id="1"},child={name="var2.[2]",exp="[2]",numchild="0",type="int",thread-id="1"}],has_more="0"
(gdb) 
-exec-continue --thread 1
^running
*running,thread-id="all"
(gdb) 
=breakpoint-modified,bkpt={number="1",type="breakpoint",disp="keep",enabled="y",addr="0x0804863e",func="main()",file="1.cc",fullname="/tmp/1.cc",line="12",thread-groups=["i1"],times="1",original-location="/tmp/1.cc:12"}
*stopped,reason="breakpoint-hit",disp="keep",bkptno="1",frame={addr="0x0804863e",func="main",args=[],file="1.cc",fullname="/tmp/1.cc",line="12"},thread-id="1",stopped-threads="all",core="0"
(gdb) 
-var-update 1 var2
^done,changelist=[{name="var2",value="{...}",in_scope="true",type_changed="false",new_num_children="1",dynamic="1",has_more="0"},{name="var2.[0]",value="1",in_scope="true",type_changed="false",has_more="0"}]
(gdb) 
-gdb-exit
^exit
=thread-exited,id="1",group-id="i1"
=thread-group-exited,id="i1"

$ cat /tmp/1.txt
python
import sys
sys.path.insert(0, '/home/yao/Source/gnu/gdb_printers/python')
from libstdcxx.v6.printers import register_libstdcxx_printers
register_libstdcxx_printers (None)
end

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