rust/tests/incremental/issue-92163-missing-sourcefile/auxiliary/second_crate.rs

// compile-flags:--extern first_crate

// Note: adding `first_crate` to the extern prelude
// (instead of using `extern_crate`) appears to be necessary to
// trigger the original incremental compilation bug.
// I'm not entirely sure why this is the case

pub fn make_it() -> first_crate::Foo {
    panic!()
}
Import `SourceFile`s from crate before decoding foreign `Span` Fixes #92163 Fixes #92014 When writing to the incremental cache, we encode all `Span`s we encounter, regardless of whether or not their `SourceFile` comes from the local crate, or from a foreign crate. When we decode a `Span`, we use the `StableSourceFileId` we encoded to locate the matching `SourceFile` in the current session. If this id corresponds to a `SourceFile` from another crate, then we need to have already imported that `SourceFile` into our current session. This usually happens automatically during resolution / macro expansion, when we try to resolve definitions from other crates. In certain cases, however, we may try to load a `Span` from a transitive dependency without having ever imported the `SourceFile`s from that crate, leading to an ICE. This PR fixes the issue by calling `imported_source_files()` when we encounter a `SourceFile` with a foreign `CrateNum`. This ensures that all `SourceFile`s from that crate are imported into the current session. 2021-12-21 13:01:10 -06:00			`// compile-flags:--extern first_crate`

			// Note: adding `first_crate` to the extern prelude
			// (instead of using `extern_crate`) appears to be necessary to
			`// trigger the original incremental compilation bug.`
			`// I'm not entirely sure why this is the case`

			`pub fn make_it() -> first_crate::Foo {`
			`panic!()`
			`}`