Vector: deque iterator not dereferencable

Hi, i've got a problem with a stl vector, and i cant find any information about this error. the error is:

deque iterator not dereferencable

while(!Servers->empty()){
if (RequestServerInfo(&Servers->front())!=0){
MisScanned++;
}

else{
if (DealWithServerInfo(&Servers->front())!=0){ //ERROR LOCATION
MisScanned++;
}

after some debugging, i found that the error was at the DealWithServerInfo function call. however, i dont see why..

can anyone help. oh yeh, the time before this error occurs is different every time, somethimes its there in 2 secs, and the next time its there in 2 mins.

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Vector: deque iterator not dereferencable

momentc
Can you post how you fixed this. I appear to be having the same problem using a queue structure, but from what I have read queues should be thread safe.
galg
The ISO/IEC C++ Standard knows nothing about threads: it assumes all code it written in a single threaded environment. Therefore none of the containers in the C++ Standard are thread safe. So if you need to use such a container in a multithreaded application then you have to ensure that you use them in a thread safe manner.
Nedrum
Ok, the problem is solved. it seems like another thread was trying to acces the vector at the same time. this is now solved. sorry for bothering
DummyJone
thanks for the answer. however, that was my first thought... but as soon as it gave that error, i paused the app, and looked at the content of Servers, and found out that it had more then 4000 items in it....

Weird thing is that i dont get the error anymore. but as soon as it occours, i'll post it
wpcheah
Looks like the deque is empty, in which case calling front would result in undefined behavior.
Vector: deque iterator not dereferencable

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