Fix compiling of each block params in strict mode

Fixes #1820
Closes #1821

Author: arturmakaranka

lib/handlebars/compiler/javascript-compiler.js

@@ -535,7 +535,9 @@ JavaScriptCompiler.prototype = {
 
   resolvePath: function(type, parts, i, falsy, strict) {
     if (this.options.strict || this.options.assumeObjects) {
-      this.push(strictLookup(this.options.strict && strict, this, parts, type));
+      this.push(
+        strictLookup(this.options.strict && strict, this, parts, i, type)
+      );
       return;
     }
 
@@ -1152,9 +1154,8 @@ JavaScriptCompiler.isValidJavaScriptVariableName = function(name) {
   );
 };
 
-function strictLookup(requireTerminal, compiler, parts, type) {
+function strictLookup(requireTerminal, compiler, parts, i, type) {
   let stack = compiler.popStack(),
-    i = 0,
     len = parts.length;
   if (requireTerminal) {
     len--;

spec/builtins.js

@@ -324,6 +324,15 @@ describe('builtin helpers', function() {
         );
     });
 
+    it('each with block params and strict compilation', function() {
+      expectTemplate(
+        '{{#each goodbyes as |value index|}}{{index}}. {{value.text}}!{{/each}}'
+      )
+        .withCompileOptions({ strict: true })
+        .withInput({ goodbyes: [{ text: 'goodbye' }, { text: 'Goodbye' }] })
+        .toCompileTo('0. goodbye!1. Goodbye!');
+    });
+
     it('each object with @index', function() {
       expectTemplate(
         '{{#each goodbyes}}{{@index}}. {{text}}! {{/each}}cruel {{world}}!'