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src/hotspot/share/gc/z/zArguments.cpp

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@@ -80,10 +80,15 @@
   FLAG_SET_DEFAULT(UseDynamicNumberOfGCThreads, true);
 
   // CompressedOops/UseCompressedClassPointers not supported
   FLAG_SET_DEFAULT(UseCompressedOops, false);
   FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
+  FLAG_SET_DEFAULT(UseSharedSpaces, false);  // requires CompressedOops and CompressedClassPointers
+
+  if (DumpSharedSpaces) {
+    vm_exit_during_initialization("DumpSharedSpaces (-Xshare:dump) is not supported with ZGC.");
+  }
 
   // ClassUnloading not (yet) supported
   FLAG_SET_DEFAULT(ClassUnloading, false);
   FLAG_SET_DEFAULT(ClassUnloadingWithConcurrentMark, false);
 
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