Rustdoc does not combine documentation in re-exports of extern functions

[cuttestkittensrule]

With the code

mod native {
    extern "C" {
        /// bar.
        pub fn bar();
    }
}

/// foo
pub use native::bar;

I expected to have the documentation in the private module and the re-export to be combined

Instead, only the documentation in the private module in shown

Meta

rustdoc --version --verbose:

rustdoc 1.86.0-nightly (3f43b1a63 2025-01-03)
binary: rustdoc
commit-hash: 3f43b1a636738f41c48df073c5bcb97a97bf8459
commit-date: 2025-01-03
host: x86_64-unknown-linux-gnu
release: 1.86.0-nightly
LLVM version: 19.1.6