src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core/src/org/graalvm/compiler/core/target/Backend.java

*** 193,206 ****
       */
      @SuppressWarnings("try")
      public InstalledCode createInstalledCode(DebugContext debug, ResolvedJavaMethod method, CompilationRequest compilationRequest, CompilationResult compilationResult,
                      SpeculationLog speculationLog, InstalledCode predefinedInstalledCode, boolean isDefault, Object[] context) {
          Object[] debugContext = context != null ? context : new Object[]{getProviders().getCodeCache(), method, compilationResult};
!         CodeInstallationTask[] tasks = new CodeInstallationTask[codeInstallationTaskFactories.size()];
          for (int i = 0; i < codeInstallationTaskFactories.size(); i++) {
              tasks[i] = codeInstallationTaskFactories.get(i).create();
          }
          try (DebugContext.Scope s2 = debug.scope("CodeInstall", debugContext);
                          DebugContext.Activation a = debug.activate()) {
              for (CodeInstallationTask task : tasks) {
                  task.preProcess(compilationResult);
              }
--- 193,209 ----
       */
      @SuppressWarnings("try")
      public InstalledCode createInstalledCode(DebugContext debug, ResolvedJavaMethod method, CompilationRequest compilationRequest, CompilationResult compilationResult,
                      SpeculationLog speculationLog, InstalledCode predefinedInstalledCode, boolean isDefault, Object[] context) {
          Object[] debugContext = context != null ? context : new Object[]{getProviders().getCodeCache(), method, compilationResult};
!         CodeInstallationTask[] tasks;
!         synchronized (this) {
!             tasks = new CodeInstallationTask[codeInstallationTaskFactories.size()];
              for (int i = 0; i < codeInstallationTaskFactories.size(); i++) {
                  tasks[i] = codeInstallationTaskFactories.get(i).create();
              }
+         }
          try (DebugContext.Scope s2 = debug.scope("CodeInstall", debugContext);
                          DebugContext.Activation a = debug.activate()) {
              for (CodeInstallationTask task : tasks) {
                  task.preProcess(compilationResult);
              }