Fix opening of shadowing, principal-signatured modules that open other modules

1 files changed, 16 insertions, 0 deletions

diff --git a/tests/openRedef.ur b/tests/openRedef.ur
new file mode 100644
index 00000000..2d8161c3
--- /dev/null
+++ b/tests/openRedef.ur
@@ -0,0 +1,16 @@
+structure M = struct
+    con num = int
+    val zero = 0
+end
+
+structure N = struct
+    open M
+    con num = num * num
+    val zero = zero + 1
+end
+
+structure O = struct
+    open N
+
+    val one : num = (zero + 1, zero)
+end