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-rw-r--r--tests/incremental/issue-79661-missing-def-path-hash.rs14
1 files changed, 14 insertions, 0 deletions
diff --git a/tests/incremental/issue-79661-missing-def-path-hash.rs b/tests/incremental/issue-79661-missing-def-path-hash.rs
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+++ b/tests/incremental/issue-79661-missing-def-path-hash.rs
@@ -0,0 +1,14 @@
+// aux-build:issue-79661.rs
+// revisions: rpass1 rpass2 rpass3
+
+// Regression test for issue #79661
+// We were failing to copy over a DefPathHash->DefId mapping
+// from the old incremental cache to the new incremental cache
+// when we ended up forcing a query. As a result, a subsequent
+// unchanged incremental run would crash due to the missing mapping
+
+extern crate issue_79661;
+use issue_79661::Wrapper;
+
+pub struct Outer(Wrapper);
+fn main() {}