# Does GC.@preserve v preserve elements of vector v?

**URL:** <https://discourse.julialang.org/t/does-gc-preserve-v-preserve-elements-of-vector-v/119375>\
**Category:** General Usage\
**Created:** [September 13, 2024, 3:11pm UTC](https://discourse.julialang.org/t/does-gc-preserve-v-preserve-elements-of-vector-v/119375 "2024-09-13T15:11:11Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![grasph](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/grasph/32/25684_2.png) [@grasph](https://discourse.julialang.org/u/grasph)\
**Post date:** [September 13, 2024, 3:11pm UTC](https://discourse.julialang.org/t/does-gc-preserve-v-preserve-elements-of-vector-v/119375/1 "2024-09-13T15:11:11Z")

</div>

Hello,

I need to preserve from GC a list of arrays define at runtime.

In the following code, will the GC.@preserve statement preserve the content of v[1] to be garbage collected and ensure p to be valid ?

```julia
v = [[1, 2], [2, 3, 4]]
p = pointer(v[1])
GC.@preserve v unsafe_load(p)

```

Thanks in advance for your answers,  
Philippe.