1 files changed, 20 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_fail/tcfail128.stderr b/testsuite/tests/typecheck/should_fail/tcfail128.stderr
new file mode 100644
index 0000000000..a3c99a9548
--- /dev/null
+++ b/testsuite/tests/typecheck/should_fail/tcfail128.stderr
@@ -0,0 +1,20 @@
+
+tcfail128.hs:18:16:
+    No instance for (Data.Array.Base.MArray b0 FlatVector IO)
+      arising from a use of `thaw'
+    Possible fix:
+      add an instance declaration for
+      (Data.Array.Base.MArray b0 FlatVector IO)
+    In a stmt of a 'do' block: v <- thaw tmp
+    In the expression:
+      do { let sL = ...
+               dim = length sL
+               ....;
+           v <- thaw tmp;
+           return () }
+    In an equation for `main':
+        main
+          = do { let sL = ...
+                     ....;
+                 v <- thaw tmp;
+                 return () }