Fix super ==: Test first for null before call inf super ==.

runtime/vm/object.cc

Index: runtime/vm/object.cc
===================================================================
--- runtime/vm/object.cc	(revision 13897)
+++ runtime/vm/object.cc	(working copy)
@@ -3361,10 +3361,21 @@
   set_kind_tag(AbstractBit::update(value, raw_ptr()->kind_tag_));
 }
 
+
 void Function::set_is_inlinable(bool value) const {
   set_kind_tag(InlinableBit::update(value, raw_ptr()->kind_tag_));
 }
 
+
+bool Function::IsInlineable() const {
+  // '==' call is handled specially.
+  const String& equality_name = String::Handle(Symbols::New("=="));

[hausner, 2012/10/22 20:00:29]

I expect this will be called quite often. It might be beneficial to allocate the
string "==" in the symbol table instead of creating a new one each time (and
then throwing it away during canonicalization).

[srdjan, 2012/10/22 20:30:51]

Symbols::New does not create new symbol each time, but returns one if it already
exists in the symbol table.

+  return InlinableBit::decode(raw_ptr()->kind_tag_) &&
+         HasCode() &&
+         name() != equality_name.raw();
+}
+
+
 intptr_t Function::NumParameters() const {
   return num_fixed_parameters() + NumOptionalParameters();
 }