Expose a lower bound of malloc'd memory via heap statistics

test/fuzzer/parser.cc

Index: test/fuzzer/parser.cc
diff --git a/test/fuzzer/parser.cc b/test/fuzzer/parser.cc
index aee4c0dab77bf00b106cc0f4aa632f7590b20898..be70b439efe45e76f01d663add1d103a4a1f75e6 100644
--- a/test/fuzzer/parser.cc
+++ b/test/fuzzer/parser.cc
@@ -33,7 +33,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
 
   v8::internal::Handle<v8::internal::Script> script =
       factory->NewScript(source.ToHandleChecked());
-  v8::internal::Zone zone;
+  v8::internal::Zone zone(i_isolate->allocator());
   v8::internal::ParseInfo info(&zone, script);
   info.set_global();
   v8::internal::Parser parser(&info);