Only capture function instantiator when compiling local function (fixes #28757).

runtime/vm/parser.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/parser.h"
 #include "vm/flags.h"
 
 #ifndef DART_PRECOMPILED_RUNTIME
 
 #include "lib/invocation_mirror.h"
@@ skipping 12868 matching lines @@
   if (!innermost_function().IsNull()) {
     // TODO(regis): Shortcut this lookup if no generic functions in scope.
     intptr_t type_param_func_level = FunctionLevel();
     const TypeParameter& type_parameter =
         TypeParameter::ZoneHandle(Z, innermost_function().LookupTypeParameter(
                                          ident, &type_param_func_level));
     if (!type_parameter.IsNull()) {
       if ((resolved == NULL) || (resolved_func_level < type_param_func_level)) {
         // The identifier is a function type parameter, possibly shadowing
         // 'resolved'.
-        if (type_param_func_level < FunctionLevel()) {
+        if ((FunctionLevel() > 0) &&
+            (type_param_func_level < FunctionLevel())) {
           // Make sure that the function instantiator is captured.
           CaptureFunctionInstantiator();
         }
         // TODO(regis): Finalize type parameter and return as type node.
         // For now, map to dynamic type.
         Type& type = Type::ZoneHandle(Z, Type::DynamicType());
         return new (Z) TypeNode(ident_pos, type);
       }
     }
   }
@@ skipping 1453 matching lines @@
         // TODO(regis): Shortcut this lookup if no generic functions in scope.
         intptr_t type_param_func_level = FunctionLevel();
         TypeParameter& type_param = TypeParameter::ZoneHandle(
             Z, innermost_function().LookupTypeParameter(
                    ident, &type_param_func_level));
         if (!type_param.IsNull()) {
           if ((primary == NULL) ||
               (primary_func_level < type_param_func_level)) {
             // The identifier is a function type parameter, possibly shadowing
             // already resolved 'primary'.
-            if (type_param_func_level < FunctionLevel()) {
+            if ((FunctionLevel() > 0) &&
+                (type_param_func_level < FunctionLevel())) {
               // Make sure that the function instantiator is captured.
               CaptureFunctionInstantiator();
             }
             return new (Z) PrimaryNode(qual_ident_pos, type_param);
           }
         }
       }
       if (primary == NULL) {
         // Check whether the identifier is a type parameter.
         if (!current_class().IsNull()) {
@@ skipping 667 matching lines @@
     const ArgumentListNode& function_args,
     const LocalVariable* temp_for_last_arg,
     bool is_super_invocation) {
   UNREACHABLE();
   return NULL;
 }
 
 }  // namespace dart
 
 #endif  // DART_PRECOMPILED_RUNTIME