- Harden coverage generation, by not attempting to compile

runtime/vm/compiler.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/compiler.h"
 
 #include "vm/assembler.h"
 
 #include "vm/ast_printer.h"
 #include "vm/block_scheduler.h"
@@ skipping 839 matching lines @@
 RawError* Compiler::CompileAllFunctions(const Class& cls) {
   Error& error = Error::Handle();
   Array& functions = Array::Handle(cls.functions());
   Function& func = Function::Handle();
   // Class dynamic lives in the vm isolate. Its array fields cannot be set to
   // an empty array.
   if (functions.IsNull()) {
     ASSERT(cls.IsDynamicClass());
     return error.raw();
   }
+  // Compile all the regular functions.
   for (int i = 0; i < functions.Length(); i++) {
     func ^= functions.At(i);
     ASSERT(!func.IsNull());
     if (!func.HasCode() &&
         !func.is_abstract() &&
         !func.IsRedirectingFactory()) {
       error = CompileFunction(func);
       if (!error.IsNull()) {
         return error.raw();
       }
     }
   }
+  // Inner functions get added to the closures array. As part of compilation
+  // more closures can be added to the end of the array. Compile all the
+  // closures until we have reached the end of the "worklist".
+  GrowableObjectArray& closures =
+      GrowableObjectArray::Handle(cls.closures());
+  if (!closures.IsNull()) {
+    for (int i = 0; i < closures.Length(); i++) {
+      func ^= closures.At(i);
+      if (!func.HasCode()) {
+        error = CompileFunction(func);
+        if (!error.IsNull()) {
+          return error.raw();
+        }
+      }
+    }
+  }
   return error.raw();
 }
 
 
 RawObject* Compiler::ExecuteOnce(SequenceNode* fragment) {
   Isolate* isolate = Isolate::Current();
   LongJump* base = isolate->long_jump_base();
   LongJump jump;
   isolate->set_long_jump_base(&jump);
   if (setjmp(*jump.Set()) == 0) {
@@ skipping 44 matching lines @@
       Object::Handle(isolate->object_store()->sticky_error());
     isolate->object_store()->clear_sticky_error();
     isolate->set_long_jump_base(base);
     return result.raw();
   }
   UNREACHABLE();
   return Object::null();
 }
 
 }  // namespace dart