[boundchecked]

If you count optimizing your ill-formed function into an inlined panic [1] as "bug eliminated at compile-time", then it may be true!

https://godbolt.org/z/M7Gr3TazE

[gdprrrr]

While it would obviously be nice to error at compile time, the docs of the slice type clearly say the code mudt panic in this case. Depending on the context, [T; 3] may be better