Fix errors with strict lookup in compat mode (#2150)

Fixes #2149, fixes #1741

lib/handlebars/compiler/javascript-compiler.js

@@ -1175,20 +1175,34 @@ function strictLookup(requireTerminal, compiler, parts, startPartIndex, type) {
     stack = compiler.nameLookup(stack, parts[i], type);
   }
 
-  if (requireTerminal) {
+  if (!requireTerminal) {
+    return stack;
+  }
+
+  if (startPartIndex > len) {
+    // Compat mode already consumed all parts via depthedLookup; the stack
+    // holds the resolved value, not an object to look the property up on.
+    // Use container.strictLookup to traverse depths with a strict error on miss.
     return [
-      compiler.aliasable('container.strict'),
-      '(',
-      stack,
-      ', ',
+      compiler.aliasable('container.strictLookup'),
+      '(depths, ',
       compiler.quotedString(parts[len]),
       ', ',
       JSON.stringify(compiler.source.currentLocation),
       ' )',
     ];
-  } else {
-    return stack;
   }
+
+  return [
+    compiler.aliasable('container.strict'),
+    '(',
+    stack,
+    ', ',
+    compiler.quotedString(parts[len]),
+    ', ',
+    JSON.stringify(compiler.source.currentLocation),
+    ' )',
+  ];
 }
 
 export default JavaScriptCompiler;