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2. exception - How to handle free() errors in C? - Stack Overflow

   stackoverflow.com/questions/6530306

   The free function causes the space pointed to by ptr to be deallocated, that is, made available for further allocation. If ptr is a null pointer, no action occurs. Otherwise, if the argument does not match a pointer earlier returned by the calloc, malloc, or realloc function, or if the space has been deallocated by a call to free or realloc ...

3. Error: free (): invalid next size (fast): - Stack Overflow

   stackoverflow.com/questions/4729395

   You may be trying to free a pointer that wasn't allocated by malloc (or delete an object that wasn't created by new) or you may be trying to free/delete such an object more than once. You may be overflowing a buffer or otherwise writing to memory to which you shouldn't be writing, causing heap corruption.

4. Error 'free (): double free detected in tcache 2' - Stack...

   stackoverflow.com/questions/77758425/error-free-double-free-detected-in-tcache-2

   Check why the first fopen call fails; check errno.It is likely some allocation happens in the first fopen call, even though it ends up failing.

5. Error: free () double free detected in tcache 2 - Stack Overflow

   stackoverflow.com/questions/71073997

   These lines of code are giving me the error: free() double free detected in tcache 2 when I attempt to run the program.

6. c++ - free(): double free detected in tcache 2 - Stack Overflow

   stackoverflow.com/questions/63413418

   The double free occurs when the stack of main is cleaned up: first delete is in the destructor of singleOutput, and the second delete is in the destructor of outputs, which holds an element that has the same pointer as singleOutput.

7. C - Error is "free (): invalid next size (normal) - Stack...

   stackoverflow.com/questions/28897965

   When you encounter errors, start with the 1. one , it might be the cause of the following errors. ==17917== Invalid write of size 8 ==17917== at 0x5E53E04: __GI ...

8. Error free (): invalid next size (fast): 0x08912058 - Stack...

   stackoverflow.com/questions/18155266

   As part of an exercise, I am modifying this class that represents a different way of creating arrays: template<class T> class Array { public: Array(int size, T defaultvalue) : _size(size) ...

9. c - Why am I getting this memory access error 'double free or ...

   stackoverflow.com/questions/12548868

   Double free means free(x) was called twice in a row with the same value of x. Somewhere in your code free(x) is called and then most likely in another piece of code free(x) is called again. The easiest way to isolate the problem is to use gdb and observe what is happening as you step through your code.

10. c++ memory error: free (): invalid next size (fast) - Stack...

    stackoverflow.com/questions/14792934

    So I found my problem. As Mats Petersson suggested, my problem was in fact an array overrun. It turns out that I had this little gem buried in my utilities for my unit tests:

11. How do I free my port 80 on localhost Windows? - Stack Overflow

    stackoverflow.com/questions/788348

    I installed XAMPP 1.6.8 and for some reason it didn't work. Later realized port 80 is not free or not listening. How can I release it or make it free? Thanks a lot!