1 files changed, 66 insertions, 0 deletions
diff --git a/tests/run-make/arguments-non-c-like-enum/test.c b/tests/run-make/arguments-non-c-like-enum/test.c
new file mode 100644
index 000000000..0a1621e49
--- /dev/null
+++ b/tests/run-make/arguments-non-c-like-enum/test.c
@@ -0,0 +1,66 @@
+#include <stdint.h>
+#include <assert.h>
+
+#include <stdio.h>
+
+/* This is the code generated by cbindgen 0.12.1 for the `enum TT`
+ * type in nonclike.rs . */
+enum TT_Tag {
+  AA,
+  BB,
+};
+typedef uint8_t TT_Tag;
+
+typedef struct {
+  uint64_t _0;
+  uint64_t _1;
+} AA_Body;
+
+typedef struct {
+  TT_Tag tag;
+  union {
+    AA_Body aa;
+  };
+} TT;
+
+/* This is the code generated by cbindgen 0.12.1 for the `enum T` type
+ * in nonclike.rs . */
+enum T_Tag {
+  A,
+  B,
+};
+typedef uint8_t T_Tag;
+
+typedef struct {
+  uint64_t _0;
+} A_Body;
+
+typedef struct {
+  T_Tag tag;
+  union {
+    A_Body a;
+  };
+} T;
+
+/* These symbols are defined by the Rust staticlib built from
+ * nonclike.rs. */
+extern uint64_t t_add(T a, T b);
+extern uint64_t tt_add(TT a, TT b);
+
+int main(int argc, char *argv[]) {
+  (void)argc; (void)argv;
+
+  /* This example works. */
+  TT xx = { .tag = AA, .aa = { ._0 = 1, ._1 = 2 } };
+  TT yy = { .tag = AA, .aa = { ._0 = 10, ._1 = 20 } };
+  uint64_t rr = tt_add(xx, yy);
+  assert(33 == rr);
+
+  /* This one used to return an incorrect result (see issue #68190). */
+  T x = { .tag = A, .a = { ._0 = 1 } };
+  T y = { .tag = A, .a = { ._0 = 10 } };
+  uint64_t r = t_add(x, y);
+  assert(11 == r);
+
+  return 0;
+}