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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
commit | 218caa410aa38c29984be31a5229b9fa717560ee (patch) | |
tree | c54bd55eeb6e4c508940a30e94c0032fbd45d677 /tests/ui/issues/issue-36278-prefix-nesting.rs | |
parent | Releasing progress-linux version 1.67.1+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-218caa410aa38c29984be31a5229b9fa717560ee.tar.xz rustc-218caa410aa38c29984be31a5229b9fa717560ee.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/issues/issue-36278-prefix-nesting.rs')
-rw-r--r-- | tests/ui/issues/issue-36278-prefix-nesting.rs | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/tests/ui/issues/issue-36278-prefix-nesting.rs b/tests/ui/issues/issue-36278-prefix-nesting.rs new file mode 100644 index 000000000..a809f7f13 --- /dev/null +++ b/tests/ui/issues/issue-36278-prefix-nesting.rs @@ -0,0 +1,20 @@ +// run-pass +// Issue 36278: On an unsized struct with >1 level of nontrivial +// nesting, ensure we are computing dynamic size of prefix correctly. + +use std::mem; + +const SZ: usize = 100; +#[allow(unused_tuple_struct_fields)] +struct P<T: ?Sized>([u8; SZ], T); + +type Ack<T> = P<P<T>>; + +fn main() { + let size_of_sized; let size_of_unsized; + let x: Box<Ack<[u8; 0]>> = Box::new(P([0; SZ], P([0; SZ], [0; 0]))); + size_of_sized = mem::size_of_val::<Ack<_>>(&x); + let y: Box<Ack<[u8 ]>> = x; + size_of_unsized = mem::size_of_val::<Ack<_>>(&y); + assert_eq!(size_of_sized, size_of_unsized); +} |