Problem with Map Iterator
Aseem Rastogi
aseem@india.tejasnetworks.com
Mon May 15 13:22:00 GMT 2006
could be because when u have erased the map node pointed to by iterMap,
iterMap++ crashes as the memory location pointed to by iterMap becomes
invalid.
so, instead of erasing in loop, do a clear () on map after the loop.
see inline.
hope this helps.
Sanjib Talukdar wrote:
>Hi,
>
>I am getting a segmentation fault error while executing the following
>code:
>
> if (!this->colDtlsByName.empty())
> {
> std::map< std::string, CS_DATAFMT*,
> std::less<std::string> >::iterator iterMap;
> for (iterMap = this->colDtlsByName.begin();
> iterMap != this->colDtlsByName.end(); ++iterMap)
> {
> CS_DATAFMT* obj = iterMap->second;
> if (obj != NULL)
> delete obj;
> this->colDtlsByName.erase(iterMap); ///////// Remove this line
> }
>
>>> call this->colDtlsByName.clear ();
>
> }
>
>The backtrace from gdb is as follows:
>
> #0 0xff0e29b4 in std::_Rb_tree_increment () from
>/usr/sfw/lib/libstdc++.so.6
> #1 0x0009854c in std::_Rb_tree_iterator<std::pair<std::string
>const, _cs_datafmt*> >::operator++ (this=0xfe77a0c4) at stl_tree.h:180
> #2 0x0005a84c in MACDBQueryHandler::clearColInfo
>(this=0xfe77bd30, inType=ALL)
> at MACDBQueryHandler.C:123
>
>The above code is in the method MACDBQueryHandler::clearColInfo() which
>is being invoked in the class destructor.
>We are using gcc version 3.4.3 on Solaris 10. The library libstdc++.so.6
>is pointing to libstdc++.so.6.0.3.
>
>Can anyone please point out the reason for the error?
>Thank You.
>Sanjib.
>
--
Nothing will work if u don't.
More information about the Gcc-help
mailing list