src/java.base/share/classes/java/lang/invoke/LambdaForm.java

*** 629,639 ****
       * before invocation.
       * (In principle, the JVM could do this very lazily,
       * as a sort of pre-invocation linkage step.)
       */
      public void prepare() {
!         if (COMPILE_THRESHOLD == 0) {
              compileToBytecode();
          }
          if (this.vmentry != null) {
              // already prepared (e.g., a primitive DMH invoker form)
              return;
--- 629,639 ----
       * before invocation.
       * (In principle, the JVM could do this very lazily,
       * as a sort of pre-invocation linkage step.)
       */
      public void prepare() {
!         if (COMPILE_THRESHOLD == 0 && !isCompiled) {
              compileToBytecode();
          }
          if (this.vmentry != null) {
              // already prepared (e.g., a primitive DMH invoker form)
              return;
*** 643,657 ****
          // TO DO: Maybe add invokeGeneric, invokeWithArguments
      }
  
      /** Generate optimizable bytecode for this form. */
      MemberName compileToBytecode() {
-         MethodType invokerType = methodType();
-         assert(vmentry == null || vmentry.getMethodType().basicType().equals(invokerType));
          if (vmentry != null && isCompiled) {
              return vmentry;  // already compiled somehow
          }
          try {
              vmentry = InvokerBytecodeGenerator.generateCustomizedCode(this, invokerType);
              if (TRACE_INTERPRETER)
                  traceInterpreter("compileToBytecode", this);
              isCompiled = true;
--- 643,657 ----
          // TO DO: Maybe add invokeGeneric, invokeWithArguments
      }
  
      /** Generate optimizable bytecode for this form. */
      MemberName compileToBytecode() {
          if (vmentry != null && isCompiled) {
              return vmentry;  // already compiled somehow
          }
+         MethodType invokerType = methodType();
+         assert(vmentry == null || vmentry.getMethodType().basicType().equals(invokerType));
          try {
              vmentry = InvokerBytecodeGenerator.generateCustomizedCode(this, invokerType);
              if (TRACE_INTERPRETER)
                  traceInterpreter("compileToBytecode", this);
              isCompiled = true;