Eagerly finalize bool class, before bool constants are used in the compiler.

runtime/vm/bootstrap.cc

Index: runtime/vm/bootstrap.cc
diff --git a/runtime/vm/bootstrap.cc b/runtime/vm/bootstrap.cc
index 8cb5d77959a201811b6f6610f17ec7738f822993..07da82231471b0caaa1f1448f18549d5d5bfc0b2 100644
--- a/runtime/vm/bootstrap.cc
+++ b/runtime/vm/bootstrap.cc
@@ -355,9 +355,12 @@ RawError* Bootstrap::LoadandCompileScripts() {
     // Eagerly compile the _Closure class as it is the class of all closure
     // instances. This allows us to just finalize function types
     // without going through the hoops of trying to compile their scope class.
-    const Class& cls =
+    Class& cls =
         Class::Handle(zone, isolate->object_store()->closure_class());
     Compiler::CompileClass(cls);
+    // Eagerly compile Bool class, bool constants are used from within compiler.
+    cls = isolate->object_store()->bool_class();
+    Compiler::CompileClass(cls);
   }
 
   // Restore the library tag handler for the isolate.