# Inconsistency with \`reduce(vcat, v)\` when the vector has a single element

**URL:** <https://discourse.julialang.org/t/inconsistency-with-reduce-vcat-v-when-the-vector-has-a-single-element/75694>\
**Category:** General Usage\
**Tags:** type-stability\
**Created:** [February 3, 2022, 12:35am UTC](https://discourse.julialang.org/t/inconsistency-with-reduce-vcat-v-when-the-vector-has-a-single-element/75694 "2022-02-03T00:35:07Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![sijo](https://avatars.discourse-cdn.com/v4/letter/s/da6949/32.png) [@sijo](https://discourse.julialang.org/u/sijo)\
**Post date:** [February 3, 2022, 8:53am UTC](https://discourse.julialang.org/t/inconsistency-with-reduce-vcat-v-when-the-vector-has-a-single-element/75694/4 "2022-02-03T08:53:42Z")

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See also a [previous discussion](https://discourse.julialang.org/t/why-is-reduce-with-concatenation-type-unstable/45023/2) and the linked issues:

[https://github.com/JuliaLang/julia/issues/31169](https://github.com/JuliaLang/julia/issues/31169)

[https://github.com/JuliaLang/julia/issues/34380](https://github.com/JuliaLang/julia/issues/34380)

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_[View the full topic](https://discourse.julialang.org/t/inconsistency-with-reduce-vcat-v-when-the-vector-has-a-single-element/75694)._