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Sign upasync fn ICEs in macro on stable #67778
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Reproduced with lastest nighlty: ICE from macro resolving I believe. rust/src/librustc/hir/map/definitions.rs Lines 511 to 513 in e380efa cc @petrochenkov |
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triage: P-high, removing nomination tag. (instead, going to proritize going through the P-high issues that have accumulated over last two weeks.) |
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Visiting from triage.. the next step is to reduce the reproducer. |
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Reduced (playground): macro_rules! doc_comment {
($x: expr, $($tt: tt)*) => {
#[doc = $x]
$($tt)*
};
}
macro_rules! paged_routes {
($($rest: tt)* ) => {
doc_comment! {
concat!("", ""),
async fn name() {}
}
paged_routes! {
$($rest)*
}
};
() => {}
}
impl Mastodon {
paged_routes! {
}
}
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I was migrating my library (Mammut) to use reqwest
0.10and be async, and the compiler ICEd. I don't know how to reduce it further than this.I tried this code:
XAMPPRocky/Mammut@f30bdec#diff-b4aea3e418ccdb71239b96952d9cddb6
I expected to see this happen: A successful build or another compile error
Instead, this happened:
thread 'rustc' panicked at 'no entry found for key', src/libcore/option.rs:1188:5Meta
I also tried this on the latest nightly and it emits the same error.
rustc --version --verbose:Backtrace: