Closed as not planned
Description
I have a project that is split into two repositories:
The hi repository specifies through cargo to be dependent on the master branch of hashc.
hashc repository crates contain some static_assert_size! assertions, which are implemented in the following way (exactly as it is in rustc itself):
pub macro static_assert_size($ty:ty, $size:expr) {
const _: [(); $size] = [(); ::std::mem::size_of::<$ty>()];
}Building hashc on its own with the following assertions in place does not produce an error:
#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
mod size_asserts {
use hash_utils::assert::static_assert_size;
use super::*;
static_assert_size!(Statement, 64);
static_assert_size!(Terminator, 104);
static_assert_size!(RValue, 40);
}However, building hi repository trips one of the assertions as having a mismatching size:
error[E0308]: mismatched types
--> /Users/alex/.cargo/git/checkouts/hashc-3190687590a997bc/556827f/compiler/hash-utils/src/assert.rs:6:28
|
5 | pub macro static_assert_size($ty:ty, $size:expr) {
| ---------------------------- in this expansion of `static_assert_size!`
6 | const _: [(); $size] = [(); ::std::mem::size_of::<$ty>()];
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected an array with a fixed size of 104 elements, found one with 96 elements
|
::: /Users/alex/.cargo/git/checkouts/hashc-3190687590a997bc/556827f/compiler/hash-ir/src/ir.rs:1534:37
|
1534 | static_assert_size!(Terminator, 104);
| ------------------------------------
| | |
| | help: consider specifying the actual array length: `96`
| in this macro invocation
It is bizarre that this is happening on the same machine with the same toolchain, but the crates are being required through a repository rather than a local crate.
rustc --version --verbose:
rustc 1.73.0-nightly (6ef7d16be 2023-08-19)
binary: rustc
commit-hash: 6ef7d16be0fb9d6ecf300c27990f4bff49d22d46
commit-date: 2023-08-19
host: x86_64-apple-darwin
release: 1.73.0-nightly
LLVM version: 17.0.0