Re: [Jsoncpp-devel] Bug?

[Scott S. <sis...@gm...>]

I had opened a question about this on Stackoverflow. Someone pointed out
that the other value wasn't being checked, but he followed up with the
following comments later on.

"That's not the problem, however, since other is not null in this case.
Rather it looks like the other object may have been deleted. How are you
managing the lifetimes of the objects in the std::map container? Is it
possible that one of the values was deleted without being removed from the
map?"

On Tue, Oct 13, 2009 at 8:27 PM, Scott Sibley <sis...@gm...> wrote:

> Looks like other.cstr_ should be checked as well.
>
> #0  0x00212bd8 in strcmp () from /lib/libc.so.6
> #1  0x0012ed2f in Json::Value::CZString::operator< (this=0x8317300, other=@0xbfffeeac)
>
>     at src/lib_json/json_value.cpp:221
> #2  0x001361b0 in std::less<Json::Value::CZString>::operator() (this=0x83173a0, __x=@0x8317300,
>     __y=@0xbfffeeac)
>
>     at /usr/lib/gcc/i586-redhat-linux/4.4.1/../../../../include/c++/4.4.1/bits/stl_function.h:230
> #3  0x00136101 in std::_Rb_tree<Json::Value::CZString, std::pair<Json::Value::CZString const, Json::Value>, std::_Select1st<std::pair<Json::Value::CZString const, Json::Value> >, std::less<Json::Value::CZString>, std::allocator<std::pair<Json::Value::CZString const, Json::Value> > >::_M_lower_bound (this=0x83173a0,
>
>     __x=0x83172f0, __y=0x83173a4, __k=@0xbfffeeac)
>
>     at /usr/lib/gcc/i586-redhat-linux/4.4.1/../../../../include/c++/4.4.1/bits/stl_tree.h:986
> #4  0x001348da in std::_Rb_tree<Json::Value::CZString, std::pair<Json::Value::CZString const, Json::Value>, std::_Select1st<std::pair<Json::Value::CZString const, Json::Value> >, std::less<Json::Value::CZString>, std::allocator<std::pair<Json::Value::CZString const, Json::Value> > >::find (this=0x83173a0, __k=@0xbfffeeac)
>
>     at /usr/lib/gcc/i586-redhat-linux/4.4.1/../../../../include/c++/4.4.1/bits/stl_tree.h:1421
> #5  0x0013383a in std::map<Json::Value::CZString, Json::Value, std::less<Json::Value::CZString>, std::allocator<std::pair<Json::Value::CZString const, Json::Value> > >::find (this=0x83173a0, __x=@0xbfffeeac)
>
>     at /usr/lib/gcc/i586-redhat-linux/4.4.1/../../../../include/c++/4.4.1/bits/stl_map.h:659
> #6  0x00131779 in Json::Value::operator[] (this=0x8317280, key=0xbfffef74 "col1")
>     at src/lib_json/json_value.cpp:1055
> #7  0x00131ba8 in Json::Value::isMember (this=0x8317280, key=0xbfffef74 "col1")
>     at src/lib_json/json_value.cpp:1169
> #8  0x0805cf4d in CFG::CFG_Fetch_Raw (this=0x825846c, section=0x8317280, key=0xbfffef74 "col1", defval=0x0)
>     at CFG.cpp:48
> #9  0x08050e5b in Generic::CFGSetup (this=0x825846c, k=0x8255e2c "display_qt") at Generic.cpp:89
> #10 0x0804df6a in LCDControl::ConfigSetup (this=0xbffff2a8) at LCDControl.cpp:81
> #11 0x0804d93b in LCDControl::Start (this=0xbffff2a8, argc=1, argv=0xbffff404) at LCDControl.cpp:15
> #12 0x0804f224 in main (argc=1, argv=0xbffff404) at Main.cpp:7
>
> bool
> Value::CZString::operator<( const CZString &other ) const
> {
>    if ( cstr_ )
>
>       return strcmp( cstr_, other.cstr_ ) < 0; //src/lib_json/json_value.cpp:221
>
>    return index_ < other.index_;
> }
>
>