Fix missing parameters for pathed mustaches

Fixes #658

lib/handlebars/compiler/ast.js

@@ -83,14 +83,14 @@ var AST = {
     var id = this.id = rawParams[0];
     var params = this.params = rawParams.slice(1);
 
-    // a mustache is an eligible helper if:
-    // * its id is simple (a single part, not `this` or `..`)
-    var eligibleHelper = this.eligibleHelper = id.isSimple;
-
     // a mustache is definitely a helper if:
     // * it is an eligible helper, and
     // * it has at least one parameter or hash segment
-    this.isHelper = eligibleHelper && (params.length || hash);
+    this.isHelper = params.length || hash;
+
+    // a mustache is an eligible helper if:
+    // * its id is simple (a single part, not `this` or `..`)
+    this.eligibleHelper = this.isHelper || id.isSimple;
 
     // if a mustache is an eligible helper but not a definite
     // helper, it is ambiguous, and will be resolved in a later

lib/handlebars/compiler/compiler.js

@@ -265,13 +265,15 @@ Compiler.prototype = {
 
   helperSexpr: function(sexpr, program, inverse) {
     var params = this.setupFullMustacheParams(sexpr, program, inverse),
-        name = sexpr.id.parts[0];
+        id = sexpr.id,
+        name = id.parts[0];
 
     if (this.options.knownHelpers[name]) {
       this.opcode('invokeKnownHelper', params.length, name);
     } else if (this.options.knownHelpersOnly) {
       throw new Exception("You specified knownHelpersOnly, but used the unknown helper " + name, sexpr);
     } else {
+      this.ID(id);
       this.opcode('invokeHelper', params.length, name, sexpr.isRoot);
     }
   },

lib/handlebars/compiler/javascript-compiler.js

@@ -503,8 +503,8 @@ JavaScriptCompiler.prototype = {
     this.context.aliases.helperMissing = 'helpers.helperMissing';
     this.useRegister('helper');
 
+    var nonHelper = this.popStack();
     var helper = this.setupHelper(paramSize, name);
-    var nonHelper = this.nameLookup('depth' + this.lastContext, name, 'context');
 
     var lookup = 'helper = ' + helper.name + ' || ' + nonHelper + ' || helperMissing';
     if (helper.paramsInit) {