1 files changed, 9 insertions, 0 deletions
diff --git a/src/test/ui/proc-macro/issue-37788.rs b/src/test/ui/proc-macro/issue-37788.rs
new file mode 100644
index 000000000..73b1f0d58
--- /dev/null
+++ b/src/test/ui/proc-macro/issue-37788.rs
@@ -0,0 +1,9 @@
+// aux-build:test-macros.rs
+
+#[macro_use]
+extern crate test_macros;
+
+fn main() {
+    // Test that constructing the `visible_parent_map` (in `cstore_impl.rs`) does not ICE.
+    std::cell::Cell::new(0) //~ ERROR mismatched types
+}