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splat-fn-ptr-ptr-tuple.rs: add let to avoid UB #161403

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Merged
rust-bors merged 1 commit into from
Aug 21, 2026
+6 −7
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splat-fn-ptr-ptr-tuple.rs: add let to avoid UB #161403

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13 changes: 6 additions & 7 deletions tests/ui/splat/splat-fn-ptr-ptr-tuple.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -66,25 +66,24 @@ fn main() {
assert_eq!((*fn_pp)(1u32, 2i8), (2i8, 1u32));

// Now with *mut and non-terminal splat
let mut fn_p = splat_non_terminal_arg as fn(#[rustc_splat] (u32, i8), f64) -> (i8, f64, u32);
let fn_pp: *mut fn(#[rustc_splat] (u32, i8), f64) -> (i8, f64, u32)
= ptr::from_mut(
&mut (splat_non_terminal_arg as fn(#[rustc_splat] (u32, i8), f64) -> (i8, f64, u32))
);
= ptr::from_mut(&mut fn_p);
unsafe {
assert_eq!((*fn_pp)(1, 2, 3.5), (2, 3.5, 1));
assert_eq!((*fn_pp)(1u32, 2i8, 3.5f64), (2i8, 3.5f64, 1u32));
}

let mut fn_p = splat_non_terminal_arg as _;
let fn_pp: *mut fn(#[rustc_splat] (u32, i8), f64) -> (i8, f64, u32)
= ptr::from_mut(&mut (splat_non_terminal_arg as _));
= ptr::from_mut(&mut fn_p);
unsafe {
assert_eq!((*fn_pp)(1, 2, 3.5), (2, 3.5, 1));
assert_eq!((*fn_pp)(1u32, 2i8, 3.5f64), (2i8, 3.5f64, 1u32));
}

let fn_pp = ptr::from_mut(
&mut (splat_non_terminal_arg as fn(#[rustc_splat] (u32, i8), f64) -> (i8, f64, u32))
);
let mut fn_p = splat_non_terminal_arg as fn(#[rustc_splat] (u32, i8), f64) -> (i8, f64, u32);
let fn_pp = ptr::from_mut(&mut fn_p);
unsafe {
assert_eq!((*fn_pp)(1, 2, 3.5), (2, 3.5, 1));
assert_eq!((*fn_pp)(1u32, 2i8, 3.5f64), (2i8, 3.5f64, 1u32));
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