fixes #10651

tests/js/tbasicenum.nim

@@ -1,10 +0,0 @@
-discard """
-  output: "ABCDC"
-"""
-
-type
-  MyEnum = enum
-    A,B,C,D
-# trick the optimizer with an seq:
-var x = @[A,B,C,D]
-echo x[0],x[1],x[2],x[3],MyEnum(2)

tests/js/tbasics.nim

@@ -0,0 +1,37 @@
+discard """
+  output: '''ABCDC
+1
+14
+ok'''
+"""
+
+type
+  MyEnum = enum
+    A,B,C,D
+# trick the optimizer with an seq:
+var x = @[A,B,C,D]
+echo x[0],x[1],x[2],x[3],MyEnum(2)
+
+# bug #10651
+
+var xa: seq[int]
+var ya = @[1,2]
+xa &= ya
+echo xa[0]
+
+proc test =
+  var yup: seq[int]
+  try:
+    yup.add 14
+    echo yup.pop
+  finally:
+    discard
+
+test()
+
+when true:
+  var a: seq[int]
+
+  a.setLen(0)
+
+  echo "ok"