2 files changed, 26 insertions, 0 deletions
diff --git a/test/typecheck/fail/overlap_field_wreg.sail b/test/typecheck/fail/overlap_field_wreg.sail
new file mode 100644
index 00000000..4c4d858d
--- /dev/null
+++ b/test/typecheck/fail/overlap_field_wreg.sail
@@ -0,0 +1,13 @@
+
+typedef A = const struct {bool field_A; int shared}
+typedef B = const struct {bool field_B; int shared}
+
+val (bool, int) -> A effect {undef, wreg} makeA
+
+function makeA (x, y) =
+{
+  (A) record := undefined;
+  record.field_A := x;
+  record.shared := y;
+  record
+}
diff --git a/test/typecheck/pass/overlap_field.sail b/test/typecheck/pass/overlap_field.sail
new file mode 100644
index 00000000..82e685ee
--- /dev/null
+++ b/test/typecheck/pass/overlap_field.sail
@@ -0,0 +1,13 @@
+
+typedef A = const struct {bool field_A; int shared}
+typedef B = const struct {bool field_B; int shared}
+
+val (bool, int) -> A effect {undef} makeA
+
+function makeA (x, y) =
+{
+  (A) record := undefined;
+  record.field_A := x;
+  record.shared := y;
+  record
+}