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Old January 6th, 2005, 05:19 AM
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Default weird access violation

hi everyone,
in wrote a program in visual c++ 6.0, and got an access violation exception after writing to a recently allocatd struct.
something like:

p=new struct_c // didn't get NULL here
p->something=value // here i got an access violation

now, i checked the code and found that before these lines i wrote to some address that was not allocated yet. when i fixed this bug, the access violation was gone.

to conclude:
1. i wrote an address that wasn't allocated and got no no error
2. i succeeded to allocated memory for my struct
3. when i wrote to the field of the struct i got the error.

i can't figure out how did the new command gave me an address and yet later i got access violation for using it.

my best guess is that visual c has it's own registration of used memory and the new command uses a different mechanism (??)

anyone has a clue??

Yosi

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