src/jdk.vm.ci/share/classes/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotJVMCIRuntime.java

@@ -327,11 +327,13 @@
     /**
      * Called from the VM.
      */
     @SuppressWarnings({"unused"})
     private CompilationRequestResult compileMethod(HotSpotResolvedJavaMethod method, int entryBCI, long jvmciEnv, int id) {
-        return getCompiler().compileMethod(new HotSpotCompilationRequest(method, entryBCI, jvmciEnv, id));
+        CompilationRequestResult result = getCompiler().compileMethod(new HotSpotCompilationRequest(method, entryBCI, jvmciEnv, id));
+        assert result != null : "compileMethod must always return something";
+        return result;
     }
 
     /**
      * Shuts down the runtime.
      *