# Valid code leads to allocation memory excess or segmentation violation

**URL:** <https://forums.developer.nvidia.com/t/valid-code-leads-to-allocation-memory-excess-or-segmentation-violation/253197>\
**Category:** nvc, nvc++ and nvfortran\
**Tags:** nvbugs\
**Created:** [May 13, 2023, 12:19pm UTC](https://forums.developer.nvidia.com/t/valid-code-leads-to-allocation-memory-excess-or-segmentation-violation/253197 "2023-05-13T12:19:59Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![juergen.reuter](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/juergen.reuter/32/38283_2.png) [@juergen.reuter](https://forums.developer.nvidia.com/u/juergen.reuter)\
**Post date:** [May 13, 2023, 12:19pm UTC](https://forums.developer.nvidia.com/t/valid-code-leads-to-allocation-memory-excess-or-segmentation-violation/253197/1 "2023-05-13T12:19:59Z")

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The attached code, when compiled with nvfortran 23.1 and executed, leads to the error message:  
0: ALLOCATE: 3298534884208 bytes requested; not enough memory  
There could be an error in calculating the address space indices or so!?  
When removing the finalizers and a bit of oter code the code leads to a segmentation violation.  
Reproducer has ca. 1.8k lines.  
[alloc\_exceed\_mem.f90](https://forums.developer.nvidia.com/uploads/short-url/rzudZIXA1Tpw9mRzv67Fp2dSMM7.f90) (55.0 KB)

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**Author:** ![MatColgrove](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/matcolgrove/32/14047_2.png) [@MatColgrove](https://forums.developer.nvidia.com/u/MatColgrove)\
**Post date:** [May 15, 2023, 5:02pm UTC](https://forums.developer.nvidia.com/t/valid-code-leads-to-allocation-memory-excess-or-segmentation-violation/253197/2 "2023-05-15T17:02:56Z")

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Hi Juergen,

Looks like this one may have been fixed already as I can reproduce the issue in 23.1 but not in 23.3. Can you try updating to 23.3 to see if it fix it for you as well?

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```auto
% nvfortran alloc_exeed_mem.f90 -V23.1; a.out
* Test output: sf_base_13
* Purpose: initialize and fill a pair generator object

* Initialize configuration data

* Initialize generator object

0: ALLOCATE: 3298534884208 bytes requested; not enough memory
% nvfortran alloc_exeed_mem.f90 -V23.3 ; a.out
* Test output: sf_base_13
* Purpose: initialize and fill a pair generator object

* Initialize configuration data

* Initialize generator object

 inside sf_test_generator_init ++++++++++++++++
* Generate free r values

```

-Mat

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<div class="post-metadata">

**Author:** ![juergen.reuter](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/juergen.reuter/32/38283_2.png) [@juergen.reuter](https://forums.developer.nvidia.com/u/juergen.reuter)\
**Post date:** [May 17, 2023, 3:04pm UTC](https://forums.developer.nvidia.com/t/valid-code-leads-to-allocation-memory-excess-or-segmentation-violation/253197/3 "2023-05-17T15:04:53Z")

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Yes, I confirm that I don’t see this problem any more with nvfortran 23.3.

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**Author:** ![system](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/system/32/68080_2.png) [@system](https://forums.developer.nvidia.com/u/system)\
**Post date:** [May 31, 2023, 3:05pm UTC](https://forums.developer.nvidia.com/t/valid-code-leads-to-allocation-memory-excess-or-segmentation-violation/253197/4 "2023-05-31T15:05:30Z")

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Closed on May 31, 2023, 3:05pm UTC

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