rust/tests/ui/dst/dst-bad-deep-2.rs

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// Try to initialise a DST struct where the lost information is deeply nested.
// This is an error because it requires an unsized rvalue. This is a problem
// because it would require stack allocation of an unsized temporary (*g in the
// test).
#![feature(unsized_tuple_coercion)]
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pub fn main() {
let f: ([isize; 3],) = ([5, 6, 7],);
let g: &([isize],) = &f;
let h: &(([isize],),) = &(*g,);
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//~^ ERROR the size for values of type
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}