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-rw-r--r--tests/sig_wild.ur9
1 files changed, 9 insertions, 0 deletions
diff --git a/tests/sig_wild.ur b/tests/sig_wild.ur
new file mode 100644
index 00000000..3f714772
--- /dev/null
+++ b/tests/sig_wild.ur
@@ -0,0 +1,9 @@
+signature S = sig
+ type t
+ val x : t
+end
+
+structure M : S = struct
+ type t = _
+ val x = 0
+end