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  1. #include <iostream>
  2.  
  3.  
  4. class Object
  5. {
  6. public:
  7.     Object()
  8.     {
  9.         _value = new int{42};
  10.     }
  11.  
  12.     ~Object()
  13.     {
  14.         delete _value;
  15.         _value = nullptr;
  16.     }
  17.  
  18.     int getInt()
  19.     {
  20.         return *_value;
  21.     }
  22.  
  23.     int* _value;
  24. };
  25.  
  26. class Object2
  27. {
  28. public:
  29.     Object2(Object* object)
  30.     {
  31.         _object = object;
  32.     }
  33.  
  34.     ~Object2()
  35.     {
  36.         delete _object;
  37.         _object = nullptr;
  38.     }
  39.  
  40.     int getInt()
  41.     {
  42.         return _object->getInt();
  43.     }
  44.  
  45.     Object* _object;
  46. };
  47.  
  48. void function_calling_object2(Object& object)
  49. {
  50.     Object2 object2(&object);
  51.  
  52.     std::cout << "function_calling_object2: " << object2.getInt() << std::endl;
  53. }
  54.  
  55. int main() {
  56.     Object object;
  57.     std::cout << "Object in main 1: " << object.getInt() << std::endl;
  58.     function_calling_object2(object);    
  59.     std::cout << "Object in main 2: " << object.getInt() << std::endl;
  60.     return 0;
  61. }
Runtime error #stdin #stdout #stderr 0s 3476KB
comments (?)
stdin
copy 
Standard input is empty
stdout
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Object in main 1: 42
function_calling_object2: 42
stderr
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*** Error in `./prog': munmap_chunk(): invalid pointer: 0xbf80a3fc ***
======= Backtrace: =========
/lib/i386-linux-gnu/i686/cmov/libc.so.6(+0x75e72)[0xb759be72]
/lib/i386-linux-gnu/i686/cmov/libc.so.6(+0x76525)[0xb759c525]
/usr/lib/i386-linux-gnu/libstdc++.so.6(_ZdlPv+0x1f)[0xb777e82f]
./prog[0x80488c8]
/lib/i386-linux-gnu/i686/cmov/libc.so.6(__libc_start_main+0xf5)[0xb753f8f5]
./prog[0x8048971]
======= Memory map: ========
08048000-08049000 r-xp 00000000 09:03 16255889   /home/MgDJk5/prog
08049000-0804a000 rw-p 00000000 09:03 16255889   /home/MgDJk5/prog
08540000-08561000 rw-p 00000000 00:00 0          [heap]
b7524000-b7526000 rw-p 00000000 00:00 0 
b7526000-b76cf000 r-xp 00000000 09:03 16394299   /lib/i386-linux-gnu/i686/cmov/libc-2.17.so
b76cf000-b76d0000 ---p 001a9000 09:03 16394299   /lib/i386-linux-gnu/i686/cmov/libc-2.17.so
b76d0000-b76d2000 r--p 001a9000 09:03 16394299   /lib/i386-linux-gnu/i686/cmov/libc-2.17.so
b76d2000-b76d3000 rw-p 001ab000 09:03 16394299   /lib/i386-linux-gnu/i686/cmov/libc-2.17.so
b76d3000-b76d6000 rw-p 00000000 00:00 0 
b76d6000-b76f1000 r-xp 00000000 09:03 16394343   /lib/i386-linux-gnu/libgcc_s.so.1
b76f1000-b76f2000 rw-p 0001a000 09:03 16394343   /lib/i386-linux-gnu/libgcc_s.so.1
b76f2000-b76f3000 rw-p 00000000 00:00 0 
b76f3000-b7734000 r-xp 00000000 09:03 16394296   /lib/i386-linux-gnu/i686/cmov/libm-2.17.so
b7734000-b7735000 r--p 00040000 09:03 16394296   /lib/i386-linux-gnu/i686/cmov/libm-2.17.so
b7735000-b7736000 rw-p 00041000 09:03 16394296   /lib/i386-linux-gnu/i686/cmov/libm-2.17.so
b7736000-b7812000 r-xp 00000000 09:03 16679929   /usr/lib/i386-linux-gnu/libstdc++.so.6.0.18
b7812000-b7813000 ---p 000dc000 09:03 16679929   /usr/lib/i386-linux-gnu/libstdc++.so.6.0.18
b7813000-b7817000 r--p 000dc000 09:03 16679929   /usr/lib/i386-linux-gnu/libstdc++.so.6.0.18
b7817000-b7818000 rw-p 000e0000 09:03 16679929   /usr/lib/i386-linux-gnu/libstdc++.so.6.0.18
b7818000-b781f000 rw-p 00000000 00:00 0 
b7821000-b7825000 rw-p 00000000 00:00 0 
b7825000-b7826000 r-xp 00000000 00:00 0          [vdso]
b7826000-b7845000 r-xp 00000000 09:03 16394256   /lib/i386-linux-gnu/ld-2.17.so
b7845000-b7846000 r--p 0001f000 09:03 16394256   /lib/i386-linux-gnu/ld-2.17.so
b7846000-b7847000 rw-p 00020000 09:03 16394256   /lib/i386-linux-gnu/ld-2.17.so
bf7ea000-bf80b000 rw-p 00000000 00:00 0          [stack]
https://ideone.com/cLdXfc
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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