Segmentation fault with unique_ptr

Segmentation fault with unique_ptr

[tassos_souris]

Hi to everyone,

I am using g++-4.9 with -std=c++14 option (no optimization flag). For some
reason i have the following singly_linked_list class. The usage is this:
1) Construct a singly linked list
2) push_front() at least 100000000 values (this is important -- i.e for 1000
values i don't get a segfault)
3) Destroy the singly linked list

At step 3 i get a segfault. What is wrong with the code?
I would appreciate it if you could take a peek and help.
(ps: bardon me if this isn't the right forum for such questions)


 



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Re: Segmentation fault with unique_ptr

[Kyrill Tkachov]

On 13/02/15 11:15, tassos_souris wrote:
> Hi to everyone,
>
> I am using g++-4.9 with -std=c++14 option (no optimization flag). For some
> reason i have the following singly_linked_list class. The usage is this:
> 1) Construct a singly linked list
> 2) push_front() at least 100000000 values (this is important -- i.e for 1000
> values i don't get a segfault)
> 3) Destroy the singly linked list
>
> At step 3 i get a segfault. What is wrong with the code?
> I would appreciate it if you could take a peek and help.
> (ps: bardon me if this isn't the right forum for such questions)

Your question will probably be lost in the torrent of automated bug 
tracker emails that go on this list. We'll need more information than 
that, including source code.
Please follow the instructions at https://gcc.gnu.org/bugs/ and submit a 
bug report if you think it's appropriate. Personally, I think you're 
just running out of memory (creating too large a list for your system), 
but I could be wrong.

Kyrill

>
>   
>
>
>
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> View this message in context: http://gcc.1065356.n5.nabble.com/Segmentation-fault-with-unique-ptr-tp1120921.html
> Sent from the gcc - bugs mailing list archive at Nabble.com.
>

Re: Segmentation fault with unique_ptr

[tassos_souris]

the main function is as simple as this:



Compile with: g++-4.9 -std=c++14 -g -o main main.cpp
and run with ./main. I get segfault. gdb in bt shows that the segfault
happens inside unique_ptr destructor. So it is not a memory issue. 
Also since the code runs with less size (i.e size=1000 no problem) i assume
that something is wrong with unique_ptr and not my code. That's of course
only an assumption don't get me wrong :)

Thanks for looking at it



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