Set local function type as uninstantiated when applicable (fix issue 12127).

runtime/vm/parser.cc

Index: runtime/vm/parser.cc
===================================================================
--- runtime/vm/parser.cc	(revision 25677)
+++ runtime/vm/parser.cc	(working copy)
@@ -5369,6 +5369,10 @@
       function_type.set_malformed_error(error);
     }
 
+    // The function type was initially marked as instantiated, but it may

[zra, 2013/07/31 21:32:33]

Why might it be wrong the first time?

[regis, 2013/07/31 23:16:44]

See comment on line 5269. The local variable and its still unknown type must be
entered in the symbol table before parsing the function signature.

+    // actually be uninstantiated.
+    function_type.ResetIsFinalized();
+
     // The function variable type should have been patched above.
     ASSERT((function_variable == NULL) ||
            (function_variable->type().raw() == function_type.raw()));