--- old/src/hotspot/share/jvmci/jvmciEnv.cpp	2019-04-24 13:36:12.000000000 -0700
+++ new/src/hotspot/share/jvmci/jvmciEnv.cpp	2019-04-24 13:36:11.000000000 -0700
@@ -120,8 +120,8 @@
   JVMCI_EXCEPTION_CONTEXT;
 
   // Now we need to check the SystemDictionary
-  if ((sym->char_at(0) == 'L' || sym->char_at(0) == 'Q') &&
-    sym->char_at(sym->utf8_length()-1) == ';') {
+  if ((sym->starts_with('L') || sym->starts_with('Q')) &&
+      sym->ends_with(';')) {
     // This is a name from a signature.  Strip off the trimmings.
     // Call recursive to keep scope of strippedsym.
     TempNewSymbol strippedsym = SymbolTable::new_symbol(sym->as_utf8()+1,