Questions tagged [invalid-pointer]
30 questions
0
votes
2 answers
C: Realloc invalid pointer?
This is my task from school:
Write a function insertString that inserts the string s2 into s1 at index n.s1 has been allocated using malloc and should be resized (the function is void again).
The program gave me a NULL on PC and when I switched to…
Jusauria
- 13
- 2
0
votes
1 answer
How to resolve 'munmap_chunk(): invalid pointer Aborted' when using strchr
I am writing a function in C using strchr. Basically, given a string from parameter, the code will identify any '\n' exists in (char content[]) and copy the string before '\n' to str using strncpy. String after '\n' is copied using strchr. The…
Calmen Chia
- 325
- 1
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0
votes
2 answers
Why does finite recursive behaviour cause a crash ? (free(): invalid pointer)
Below is my code just a function called kk that will be recursively called for 10 times so impossible to cause stack overflow, but it crashes with
Error in `./3': free(): invalid pointer: 0x0000000000602100
Who knows the reason??
string…
Caiyi Zhou
- 143
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- 9
0
votes
1 answer
undefined behaviour to use raw pointer from a deleted shared_ptr?
I have following code
#include
#include
#include
int main()
{
void* p_any = nullptr;
{
auto p_src = std::make_shared(10); // new instance
p_any = p_src.get(); …
rnd_nr_gen
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- 55
0
votes
0 answers
How to find the invalid pointer in a C++ tree program?
My program is simple, make a tree (min heap), and through a inorder traversal to store data to an array, then destroy the tree (heap).
When I run to the store step, the program crash. I can't find why, even I know the bug position (I comment some…
user6778787
- 1
- 2
0
votes
0 answers
dlopen fails to load library, invalid pointer
I have a library "libqscr.so", that I load into my program during the runtime using dlopen. It was working perfectly, after I rebooted my PC, dlopen started giving me this error:
*** Error in `/path/to/program': realloc(): invalid pointer:…
Nafees
- 509
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- 16
0
votes
1 answer
Templated Dequeue invalid pointer: Fails on deleting class
My templated queue's dequeue function works fine for a queue of string, but if I use my custom Robot class, it crashes upon trying to delete the pointer. I'm curious as to why.
For example, in main.cpp
#include
#include…
Wezabi
- 3
- 3
0
votes
1 answer
Delphi XE3 Invalid Pointer when trying to free FSQL (TStringList)
I'm creating a new app in XE3 but using some units created in D2007.
I"m getting an error when freeing a TStringList data item. Here's the code that creates the data item FSQL:
procedure TPayorDM.DataModuleCreate(Sender: TObject);
begin
FPayorDRM…
Rich R
- 367
- 4
- 15
-1
votes
1 answer
Does returning a pointer from a function make it invalid to reallocate?
So I'm currently trying to write a C program to track the longest word(s) from argv.
It's been going great! Until I tried to reallocate a character double pointer, it seems to think it's an invalid pointer.
The exact error I'm getting is;
realloc():…
Niall Ryan
- 3
- 3
-1
votes
4 answers
Invalid pointer after a call to delete
I have this simple code in a file called virtual.cpp:
#include
class Parent
{
public:
virtual ~Parent(){ std::cout << "Parent Destructor" << std::endl; }
virtual void VirtualFunction()
{
std::cout <<…
vaeVictis
- 484
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- 13
-1
votes
2 answers
Why does this C code give me a segmentation fault?
Using the CS50 library, this is my code but it keeps giving me a segmentation fault. I have tried to figure out where it keeps doing a segmentation fault, and for some reason it has to do with my function. Why does it keep doing this?
#import…
Deegan
- 1
-1
votes
3 answers
What exactly happens when I do buffer1.push_back(buffer2.front()) in C++?
Help me understand this.
Here is the context.
I am writing a program in C++.
I have 2 buffers (deque). Let's call them buffer1 and buffer2;
I have 2 threads: one thread is filling buffer1 with random values. The other one is copying the oldest…
Filipe Santos
- 61
- 2
- 9
-2
votes
1 answer
Valgrind gets stuck in infinite loop
While testing a C programming project I encountered this error:
realloc(): invalid pointer
I tried to find the cause of the problem using Valgrind. When when I ran the code in Valgrind, it got stuck in an infinite loop in a different part of my…
joephek09
- 11
- 1
-3
votes
2 answers
C free variables used with strtok
I already saw post similar to this one, but I found a little difference that drive me in the wrong way.
I have this code:
char * token_one = strtok(my_buffer, " ,.-");
char * token_two = strtok(NULL, " ,.-");
free(token_one);
free(token_two);
I…
user4789408
- 1,196
- 3
- 14
- 31
-3
votes
1 answer
invalid pointer when passing string in c++
I have two c++ classes, let's call one hier and the other one cp. During startup, hier creates an instance of cp. cp reads in a text file with two columns, which are called resp_r and resp_l, and stores the contents in two arrays of the same name.…
musterschüler
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