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Rollup merge of #82258 - tmiasko:foreign-hir-stats, r=davidtwco

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Implement -Z hir-stats for nested foreign items

An attempt to compute HIR stats for crates with nested foreign items results in an ICE.

```rust
fn main() {
    extern "C" { fn f(); }
}
```

```
thread 'rustc' panicked at 'visit_nested_xxx must be manually implemented in this visitor'
```

Provide required implementation of visitor method.
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Dylan DPC 2021-02-23 16:10:22 +01:00 committed by GitHub
commit 2982ba50fc
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5
compiler/rustc_passes/src/hir_stats.rs
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@ -114,6 +114,11 @@ impl<'v> hir_visit::Visitor<'v> for StatCollector<'v> {
self.visit_impl_item(nested_impl_item)
}
fn visit_nested_foreign_item(&mut self, id: hir::ForeignItemId) {
let nested_foreign_item = self.krate.unwrap().foreign_item(id);
self.visit_foreign_item(nested_foreign_item);
}
fn visit_nested_body(&mut self, body_id: hir::BodyId) {
let nested_body = self.krate.unwrap().body(body_id);
self.visit_body(nested_body)