Merge branch 'thejh-bugfix-1099' into stable

lib/nodes.js

@@ -1719,6 +1719,9 @@
         }
         return _results;
       }).call(this);
+      if (tests.length === 0) {
+        return 'false';
+      }
       tests = tests.join(cnj);
       if (o.level < LEVEL_OP) {
         return tests;

src/nodes.coffee

@@ -1340,6 +1340,7 @@ exports.In = class In extends Base
     [cmp, cnj] = if @negated then [' !== ', ' && '] else [' === ', ' || ']
     tests = for item, i in @array.base.objects
       (if i then ref else sub) + cmp + item.compile o, LEVEL_OP
+    return 'false' if tests.length is 0
     tests = tests.join cnj
     if o.level < LEVEL_OP then tests else "(#{tests})"
 

test/array_literals.coffee

@@ -58,6 +58,7 @@ test "mixed shorthand objects in array lists", ->
   eq arr[2].b, 1
   eq arr[3], 'b'
 
+
 test "array splats with nested arrays", ->
   nonce = {}
   a = [nonce]

test/operators.coffee

@@ -184,6 +184,10 @@ test "#768: `in` should preserve evaluation order", ->
   ok a() not in [b(),c()]
   eq 3, share
 
+test "#1099: empty array after `in` should compile to `false`", ->
+  eq 1, [5 in []].length
+  eq false, do -> return 0 in []
+
 
 # Chained Comparison