diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..1c50873
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,108 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "libc"
+version = "0.2.134"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "329c933548736bc49fd575ee68c89e8be4d260064184389a5b77517cddd99ffb"
+
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+checksum = "d2499b7bd9834270bf24cfc4dd96be59020ba6fd7f3276b772aee2de66e82b63"
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+ "mini_paste-proc_macro",
+]
+
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+
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+ "unicode-ident",
+]
+
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+ "proc-macro2",
+]
+
+[[package]]
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+ "safer-ffi",
+]
+
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+ "quote",
+ "syn",
+]
+
+[[package]]
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+ "libc",
+ "mini_paste",
+ "proc-macro-hack",
+ "require_unsafe_in_body",
+ "safer_ffi-proc_macro",
+]
+
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+ "proc-macro-hack",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
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+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..901746c
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "ra-bug"
+version = "0.0.0"
+edition = "2021"
+license = "MIT OR Apache-2.0"
+
+[features]
+default = ["c_api"]
+c_api = []
+
+[dependencies]
+safer-ffi = { version = "0.0.10", features = ["proc_macros"] }
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..c02159e
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,30 @@
+// This one works
+#[safer_ffi::derive_ReprC]
+#[ReprC::opaque]
+pub struct NotGated {
+    bar: String,
+}
+
+// This one doesn't work
+#[cfg_attr(feature = "c_api", safer_ffi::derive_ReprC, ReprC::opaque)]
+pub struct Gated {
+    bar: String,
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_foobar() {
+        let not_gated = NotGated {
+            bar: "yeet".to_string(),
+        };
+        let gated = Gated {
+            bar: "yeet".to_string(),
+        };
+        // Intellisense works for `not_gated` but fails on `gated`, go ahead and try it
+        assert_eq!(gated.bar, "yeet");
+        assert_eq!(not_gated.bar, "yeet");
+    }
+}