src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/codegen/CodeGenerator.java

*** 3281,3291 ****
          body.accept(this);
          if(repeatLabel != continueLabel) {
              emitContinueLabel(continueLabel, liveLocalsOnContinue);
          }
  
!         if (loopNode.hasPerIterationScope() && lc.getParentBlock().needsScope()) {
              // ES6 for loops with LET init need a new scope for each iteration. We just create a shallow copy here.
              method.loadCompilerConstant(SCOPE);
              method.invoke(virtualCallNoLookup(ScriptObject.class, "copy", ScriptObject.class));
              method.storeCompilerConstant(SCOPE);
          }
--- 3281,3291 ----
          body.accept(this);
          if(repeatLabel != continueLabel) {
              emitContinueLabel(continueLabel, liveLocalsOnContinue);
          }
  
!         if (loopNode.hasPerIterationScope() && lc.getCurrentBlock().needsScope()) {
              // ES6 for loops with LET init need a new scope for each iteration. We just create a shallow copy here.
              method.loadCompilerConstant(SCOPE);
              method.invoke(virtualCallNoLookup(ScriptObject.class, "copy", ScriptObject.class));
              method.storeCompilerConstant(SCOPE);
          }