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Pure Virtual Function Called Error

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This was EXACTLY our problem case (wrong ref-count caused by race conditions). Counterintuitive polarizing filters Non payment on (Phone) Handset Lease Why does a full moon seem uniformly bright from earth, shouldn't it be dimmer at the "border"? Destruct the derived class instance member variables. Because of this difference in behavior, it is recommended that you never invoke an object's virtual function while it is being constructed or destroyed. Source

So, in a concrete example... An abstract class's vtbl can have a pointer to a special function. No Smart Pointer Panacea Reference-counted smart pointers are very helpful in avoiding these kinds of problems. template class Foo { public: Foo() {}; ~Foo() {}; public: void _MethodThatDestructs() {}; void SomeMethod1() { this->_MethodThatDestructs(); }; /* OK */ }; share|improve this answer answered Nov 16 '12 http://stackoverflow.com/questions/14549489/how-to-fix-pure-virtual-function-called-runtime-error

Pure Virtual Method Called Terminate Called Without An Active Exception

This is specified explicitly in 12.7 [class.cdtor]/3. As we'll see, the Common Language Runtime (CLR) from Microsoft's .NET Framework, and Sun Studio 11's dbx debugger, work this way. share|improve this answer edited Sep 19 '08 at 4:24 answered Sep 19 '08 at 4:11 BCS 25.6k43146247 It is not a bug in the compiler, if that is what Since you provided an implementation for it, the compiler finds the function and it works.

However, I do not know how to rework my code to prevent this from happening. Sun Studio 11: "Pure virtual function called" (same as for the first two programs). Can you comment on that? Pure Virtual Method Called C++ Cheers –Tony D Nov 11 '15 at 3:52 add a comment| up vote 7 down vote Here are a few cases in which a pure virtual call can happen.

Are illegal immigrants more likely to commit crimes? For example: std::vector objContainer; if (!objContainer.empty()) const BaseClass& objRef = objContainer.front(); // Do some processing using objRef and then you erase the first // element of objContainer objContainer.erase(objContainer.begin()); const std::string& I.e. What is the purpose of diodes in flip-dot displays?

Beware that destructors are automatically called in case of stack unwinding, it might therefore be dangerous to wait indefinitely while failing; especially if the thread is waiting for data that should Pure Virtual Function Call Skyrim class A { A *pThis; public: A() : pThis(this) { } void callFoo() { pThis->foo(); // call through the pThis ptr which was initialized in the constructor } virtual void foo() This is a different kind of dangling pointer. If you're lucky, this will look enough like garbage that the program will crash immediately.

  • If the member function is defined, the program runs without problems.
  • Unfortunately you do not show the relevant code.
  • more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed
  • class AbstractShape { public: virtual double area() const = 0; double value() const; // Meyers 3rd Item 7: virtual ~AbstractShape(); protected: AbstractShape(double valuePerSquareUnit); private: double valuePerSquareUnit_; protected: AbstractShape(double valuePerSquareUnit); private: double
  • This could be achieved with a Strategy pattern: provide a customizable interface, your strategy provide a manager class that encapsulate the functionality and defers to the strategy for the customizable parts
  • It has nothing to do with mere formulation.
  • At least author and title should be there, maybe also the publication date. –Wolf Jun 11 '15 at 10:53 @Jeff Hillman: very informative article.
  • Even with smart pointers, you can still run into these kinds of problems ...

Pure Virtual Method Called Java

share|improve this answer answered Sep 19 '08 at 4:15 Braden 1,05189 add a comment| up vote 0 down vote I'd guess there is a vtbl created for the abstract class for http://stackoverflow.com/questions/99552/where-do-pure-virtual-function-call-crashes-come-from This error is generated when debugging a program that executes a call on a virtual function whose body is not found. Pure Virtual Method Called Terminate Called Without An Active Exception In real life, it's never that simple, except sometimes in retrospect. Pure Virtual Function Call Fix a classic case of dead-lock.

When you call it indirectly, through bar(), the compiler must use the dynamic type, so it does a virtual call that gets resolved at runtime. this contact form Programmers, in any language, need to design in terms of object ownership. Not the answer you're looking for? Where "working" in the sense that it reproduces the problem. Pure Virtual Function Call R6025

Beware that destructors are automatically called in case of stack unwinding, it might therefore be dangerous to wait indefinitely while failing; especially if the thread is waiting for data that should Sun's compiler generated the same message, but Sun's debugger provided some additional information. Because of this difference in behavior, it is recommended that you never invoke an object's virtual function while it is being constructed or destroyed. have a peek here What to do with my pre-teen daughter who has been out of control since a severe accident?

I've seen an amusing variation of this in a multithreaded program: an object is being destructed on thread A, while thread B is attempting to call a virtual function. Pure Virtual Function Call Error share|improve this answer edited Jan 2 '10 at 10:11 answered Jan 2 '10 at 10:05 Prasoon Saurav 58.7k29200313 add a comment| up vote 1 down vote This behavior is not undefined, Construction consists of base class and non-static data member initialisation before the constructor's initialisation list and body are processed; it's pretty much the same in reverse during destruction.

Pointing Out Blame There's at least one other problem that can lead to this message, which doesn't seem to be explicitly described anywhere in print or on the net. (There have

The most common error I've seen that causes this is calling a virtual function from a base class constructor or destructor. Access violation reading location 0xfeeefeee." This is clearly "dead beef" behavior; when memory was freed, the runtime overwrote it with garbage. and as opposed to languages like Java and C#, in C++ this is safe to do (and does exactly what I expect, but maybe not what someone who doesn't know the Pure Virtual Method Called Destructor I get the error "pure virtual function" called.

Misuse of parentheses for multiplication Steepest descent/gradient descent as dynamical system Fill in the Minesweeper clues To find the number of X completed, when can I subtract two numbers and when That might be the most-derived subclass, or anywhere in between. Member functions, including virtual functions (10.3), can be called during construction or destruction (12.6.2). Check This Out Dispatch to pure virtual functions can happen as illustrated here, without threading, async, reinterpret_cast etc.. –Tony D Nov 11 '15 at 3:50 Separately, from the link you provide or

Never Call Virtual Functions during Construction or Destruction An Excerpt from Effective C++, Third Edition by Scott Meyers June 6, 2005 http://www.artima.com/cppsource/nevercall.html share|improve this answer edited Dec 5 '13 at 7:25 This is the debugger's way of saying, "You just used something in a block of memory, but this isn't a block of memory I think you should be using." Once the Construct the derived class instance member variables. up vote 78 down vote favorite 22 I sometimes notice programs that crash on my computer with the error: "pure virtual function call".

The memory might have been left exactly the way it was. But I agree for partially constructed (or corrupted) objects when virtual table is simply incorrect. Execute the body of the derived class constructor. Something odd might happen to p1, so let's make a copy of it.

Thinking for yourself doesn't mean thinking by yourself, however; there is some good existing work that can help you. Are illegal immigrants more likely to commit crimes? Join them; it only takes a minute: Sign up pure virtual method called error up vote 1 down vote favorite I have the following definitions: class PartitioningMethod { public: virtual void For another formulation, during construction and destruction of class T, the dynamic type is T, so that calls behave the same as if the object was instantiated as T (which it

but then that is not an error! :| –Nawaz Jan 6 '11 at 7:26 That's really what my question is. :-) There may not be another way to trigger I tried it on VC++ 2010 Beta 2 and on g++ 4.4.1 on Ubuntu 9.10. The rules for virtual invocation are different. Some function created an object, and pointed two pointers at it.

Browse other questions tagged c++ pure-virtual or ask your own question. Join them; it only takes a minute: Sign up What can cause a pure virtual function call in C++? The object is still an AbstractShape at this point. Construct the base class instance member variables.