1 files changed, 17 insertions, 0 deletions
diff --git a/test/aryunasgn.awk b/test/aryunasgn.awk
new file mode 100644
index 00000000..ccb3fd23
--- /dev/null
+++ b/test/aryunasgn.awk
@@ -0,0 +1,17 @@
+BEGIN {
+    a[i] = "null"                         # i is initially undefined
+    for (i in a) {                        # i is null string
+        print length(i), a[i] # , typeof(i)  # 0 null
+        print (i==0), (i=="")             # 1 1  should be  0 1
+    }
+    print a[""]                           # null
+    print a[0]                            #
+
+    b[$2] = "null also"                   # $2 is also undefined
+    for (j in b) {
+        print length(j), a[j] # , typeof(i)  # 0 null
+        print (j==0), (j=="")             # 1 1  should be  0 1
+    }
+    print b[""]                           # null
+    print b[0]                            #
+}