# \#vcat

**URL:** https://discourse.julialang.org/tag/vcat/569.md

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## [Type stability problem (Vcat, Tuple and function)](https://discourse.julialang.org/t/type-stability-problem-vcat-tuple-and-function/53862)

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**Author:** [@Marcell\_Havlik](https://discourse.julialang.org/u/Marcell_Havlik)\
**Replies:** 8\
**Last updated:** [January 25, 2021, 1:24pm UTC](https://discourse.julialang.org/t/type-stability-problem-vcat-tuple-and-function/53862 "2021-01-25T13:24:43Z")

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Hey Julianners, I am working on type stability and I just can’t understand what is going on here. Finally I could minimalise my example to 3 line. @code\_warntype (vcat(\[randn(1,1,3) for i in 1:3\]...)) baz() = (vcat(\[ra…