Put PushArgument into the environment instead of raw values.

runtime/vm/il_printer.cc

Index: runtime/vm/il_printer.cc
diff --git a/runtime/vm/il_printer.cc b/runtime/vm/il_printer.cc
index a06589eb0c26b42c08c640de1f52feec99f87e16..bf84dc4803af79f400ff89691dd40837e50fd5f7 100644
--- a/runtime/vm/il_printer.cc
+++ b/runtime/vm/il_printer.cc
@@ -775,9 +775,7 @@ void Environment::PrintTo(BufferFormatter* f) const {
   for (intptr_t i = 0; i < values_.length(); ++i) {
     if (i > 0) f->Print(", ");
     values_[i]->PrintTo(f);
-    if ((locations_ != NULL) &&
-        (i < location_count_) &&
-        !locations_[i].IsInvalid()) {
+    if ((locations_ != NULL) && !locations_[i].IsInvalid()) {
       f->Print(" [");
       locations_[i].PrintTo(f);
       f->Print("]");