src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/parser/Parser.java

*** 1960,1969 ****
--- 1960,1981 ----
              }
  
              switch (type) {
              case SEMICOLON:
                  // for (init; test; modify)
+                 if (varDeclList != null) {
+                     assert init == null;
+                     init = varDeclList.init;
+                     // late check for missing assignment, now we know it's a for (init; test; modify) loop
+                     if (varDeclList.missingAssignment != null) {
+                         if (varDeclList.missingAssignment instanceof IdentNode) {
+                             throw error(AbstractParser.message("missing.const.assignment", ((IdentNode)varDeclList.missingAssignment).getName()));
+                         } else {
+                             throw error(AbstractParser.message("missing.destructuring.assignment"), varDeclList.missingAssignment.getToken());
+                         }
+                     }
+                 }
  
                  // for each (init; test; modify) is invalid
                  if ((flags & ForNode.IS_FOR_EACH) != 0) {
                      throw error(AbstractParser.message("for.each.without.in"), token);
                  }