Add ducktype test from #7 as a failure case.

TPolzer · TPolzer · commit 05ee0e08a094 · 2018-11-16T23:14:25.000+01:00
diff --git a/tests/testdataducktype.err b/tests/testdataducktype.err
@@ -0,0 +1 @@
+1 2 3
diff --git a/tests/testprogducktype.in b/tests/testprogducktype.in
@@ -0,0 +1,7 @@
+SET(n = 3)
+SET(a = 0) # a is 0
+REPI(i, n, SPACE)
+    INT(1, 10, a[i]) # no, changed my mind, a is an array
+END
+NEWLINE
+ASSERT(UNIQUE(a))
