Fixing issue #276 -- unsoaked cached indexes.

lib/nodes.js

@@ -353,7 +353,7 @@
       return this.base instanceof LiteralNode && this.base.value.match(NUMBER);
     };
     ValueNode.prototype.cacheIndexes = function(o) {
-      var _len, _ref2, _ref3, copy, i, index, indexVar, prop;
+      var _len, _ref2, _ref3, copy, first, i, index, indexVar, prop;
       copy = new ValueNode(this.base, this.properties.slice(0));
       if (this.base.isComplex()) {
         _ref2 = this.base.compileReference(o);
@@ -367,8 +367,11 @@
           _ref3 = prop.index.compileReference(o);
           index = _ref3[0];
           indexVar = _ref3[1];
-          this.properties[i] = new IndexNode(index);
+          this.properties[i] = (first = new IndexNode(index));
           copy.properties[i] = new IndexNode(indexVar);
+          if (prop.soakNode) {
+            first.soakNode = true;
+          }
         }
       }
       return [this, copy];

src/nodes.coffee

@@ -346,9 +346,10 @@ exports.ValueNode = class ValueNode extends BaseNode
       [@base, copy.base] = @base.compileReference o
     for prop, i in copy.properties
       if prop instanceof IndexNode and prop.index.isComplex()
-        [index, indexVar] = prop.index.compileReference o
-        this.properties[i] = new IndexNode index
+        [index, indexVar]  = prop.index.compileReference o
+        this.properties[i] = first = new IndexNode index
         copy.properties[i] = new IndexNode indexVar
+        first.soakNode     = yes if prop.soakNode
     [this, copy]
 
   # Override compile to unwrap the value when possible.

test/test_existence.coffee

@@ -147,3 +147,5 @@ ok (maybe_close plus1, 41)?() is 42
 ok (maybe_close 'string', 41)?() is undefined
 
 ok 2?(3) is undefined
+
+ok calendar?[Date()] is undefined