Fix problem of excessive attempts to optimize, fix excessive deoptimizations for load/store indexed…

runtime/vm/exceptions.cc

Index: runtime/vm/exceptions.cc
===================================================================
--- runtime/vm/exceptions.cc	(revision 9677)
+++ runtime/vm/exceptions.cc	(working copy)
@@ -13,7 +13,7 @@
 
 namespace dart {
 
-DEFINE_FLAG(bool, print_stack_trace_at_throw, false,
+DEFINE_FLAG(bool, print_stacktrace_at_throw, false,
     "Prints a stack trace everytime a throw occurs.");
 
 
@@ -153,7 +153,7 @@
   } else {
     stacktrace ^= existing_stacktrace.raw();
   }
-  if (FLAG_print_stack_trace_at_throw) {
+  if (FLAG_print_stacktrace_at_throw) {
     OS::Print("Exception '%s' thrown:\n", exception.ToCString());
     OS::Print("%s\n", stacktrace.ToCString());
   }
@@ -284,7 +284,7 @@
 
   // Type errors in the core library may be difficult to diagnose.
   // Print type error information before throwing the error when debugging.
-  if (FLAG_print_stack_trace_at_throw) {
+  if (FLAG_print_stacktrace_at_throw) {
     if (!malformed_error.IsNull()) {
       OS::Print("%s\n", malformed_error.ToCString());
     }