8339159: api/java_rmi/Naming/Rebind.html crashes with SEGV from UTF8::quoted_ascii_length call

Reviewed-by: iklam, aboldtch

Author: David Holmes

src/hotspot/share/classfile/symbolTable.cpp

@@ -174,7 +174,8 @@ class SymbolTableConfig : public AllStatic {
       log_trace_symboltable_helper(&value, "Freeing permanent symbol");
       size_t alloc_size = SymbolTableHash::get_dynamic_node_size(value.byte_size());
       if (!SymbolTable::arena()->Afree(memory, alloc_size)) {
-        log_trace_symboltable_helper(&value, "Leaked permanent symbol");
+        // Can't access the symbol after Afree, but we just printed it above.
+        NOT_PRODUCT(log_trace(symboltable)(" - Leaked permanent symbol");)
       }
     }
     SymbolTable::item_removed();