Failure to compile unit tests for procedural macros on stable-x86_64-pc-windows-gnu #128944
Description
I tried the following code.
In the proc-macro nested crate macros-derive:
use proc_macro::TokenStream;
#[proc_macro_derive(NoDerive)] // does nothing
pub fn derive_print_type(_input: proc_macro::TokenStream) -> proc_macro::TokenStream {
TokenStream::new()
}
#[cfg(test)]
mod tests {
#[test]
fn test() {}
}In the main crate:
use macros_derive::NoDerive;
fn main() {
_ = S;
}
#[derive(NoDerive)]
struct S;
I expected to see this happen: cargo test runs to completion.
Instead, compilation of the test target fails:
Compiling macros v0.1.0 (…\proc-macro failure\macros)
Compiling macros-derive v0.1.0 (…\proc-macro failure\macros\derive)
error: Error calling dlltool 'dlltool.exe': program not founderror: could not compile
macros-derive(lib test) due to 1 previous error
warning: build failed, waiting for other jobs to finish...
If I add dlltool from self-contained folder (from inside the toolchain folder) to PATH, the compilation fails with:
error: Dlltool could not create import library
Stable version:
rustc 1.80.0 (0514789 2024-07-21)
binary: rustc
commit-hash: 0514789
commit-date: 2024-07-21
host: x86_64-pc-windows-gnu
release: 1.80.0
LLVM version: 18.1.7
Nightly version (same result):
rustc 1.82.0-nightly (ca5d25e 2024-08-09)
binary: rustc
commit-hash: ca5d25e
commit-date: 2024-08-09
host: x86_64-pc-windows-gnu
release: 1.82.0-nightly
LLVM version: 19.1.0